volume 1 · no. 2 · december 2010 ne ws · repor ts · research ne ws · ar ticles · correspondence socie t y and association ne ws · book ne ws · for thcoming ...
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the enigma of
calonectria
species occurring on leaves of
Ilex
aquifolium
in europe
christian lechat
, Pedro w. crous
and Johannes z. groenewald
ascoFrance, 64 route de chizé, F-79360, villiers en Bois, France; corresponding author e-mail: lechat@ascofrance.fr
cBs-Knaw Fungal Biodiversity centre, uppsalalaan 8, 3584 ct utrecht, the netherlands
abstract:
species of
calonectria
are common saprobes and plant pathogens on a wide range of hosts
occurring in subtropical to tropical regions of the world. the aim of the present study was to resolve
the status of new
calonectria
collections obtained on
Ilex
leaves from France. Based on dna sequence
data of their
-tubulin and histone gene regions, as well as morphology, the new collections matched
the ex-type strain of
cylindrocladium ilicicola
. on the host and in culture, yellow to brownish-yellow
perithecia were observed that did not strain red in 3 % Koh. Based on these results,
c. ilicicola
and
its purported teleomorph,
ca. pyrochroa
, were shown to represent two distinct species, as the latter
has bright red perithecia that strain purple in Koh. a new combination,
ca. lauri
, based on
tetracytum
lauri,
is subsequently proposed for
c. ilicicola
.
calonectria lauri
is distinct from
ca. ilicicola
, a pathogen
commonly associated with cylindrocladium black rot of peanut. Finally,
ca. canadiana
is proposed as
new name for
cy. canadiense
, which is a nursery pathogen involved with root rot of several tree genera
in quebec, canada.
article info:
submitted: 1 september 2010; accepted: 29 september 2010; Published: 2 november 2010.
nt
roduc
tI
species of
calonectria
are members of
nectriaceae
hypocreales
ascomycetes
) (lombard 2010a–c).
nectriaceae
are characterised by having uniloculate,
orange to purple, supercial ascomata (rossman
et al.
1999).
calonectria
is easily distinguished
from other members of the family based on its
cylindrocladium
anamorphs. Formerly
cylindrocladium
also included members of
cylindrocladiella
, a genus
that accommodates
cylindrocladium
-like species with
small conidia (Boesewinkel 1982, victor
et al
. 1998) and
nectricladiella
teleomorphs (schoch
et al
. 2000). other
morphologically similar genera that have also since been
separated from this complex include
Xenocylindrocladium
(decock
et al
. 1997),
curvicladiella
(crous
et al
. 2006a)
and
dematiocladium
(crous
et al
. 2005). Following the
approach of crous
et al.
(2006b, 2008, 2009a, b) with
other fungal groups, lombard
et al.
(2009, 2010a–d)
chose to use the older
calonectria
name for the genus,
irrespective whether the teleomorph or
cylindrocladium
anamorph, unnamed microconidial, megaconidial, or
chlamydospore-like synanamorph was observed. all
taxa are since accommodated in
calonectria
, which is a
monophyletic genus (lombard
et al
. 2010a–c).
most species of
calonectria
occur commonly in
soil, especially in subtropical to tropical regions of
the world. although the genus was originally regarded
as saprobic (graves 1915), taxa have since been
proven to be important plant pathogens, associated
with a wide host range of plants, causing disease
symptoms ranging from leaf spots to stem cankers,
damping off, cutting rot, root and fruit rot (crous
et al
2004b, 2006a, lombard
et al
. 2009, 2010a, d). major
diseases attributed to
calonectria
infections include
cylindrocladium black rot of
arachis hypogea
(peanut),
and red crown rot of
glycine max
(soybean) (crous
et
al
. 1993, wright
et al.
2010), as well as root rot and
leaf diseases of numerous diverse hosts (crous
et al
2004b, 2006a).
over the past few years, a species of
calonectria
was collected from leaves of
Ilex aquifolium
in
France. Presently four species of
calonectria
have
been described from
Ilex
(
aquifoliaceae
), namely
calonectria morganii
on
Ilex paraguayensis
in
argentina, and
Ilex vomitoria
in Florida (usa);
calonectria avesiculata
on
Ilex
spp. in georgia and
Florida (usa),
cylindrocladium ilicicola
(as
calonectria
pyrochroa
) on
Ilex aquifolium
on clare Island (Ireland),
and
calonectria spathulata
on
Ilex paraguariensis
in
Key words:
hypocreales
calonectria
cylindrocladium
Ilex aquifolium
tuB
hIs
systematics
Ima Fu
gus
volu
me
1
o 2: 101–108
echat
et al
Brazil (crous 2002). hawksworth & sivanesan (1976)
also reported a
calonectria
species on
Ilex aquifolium
from slapton, south devon, england, which appears
to be undescribed, with ascospores 3-septate, 14–22
×3–4 µm. the collection obtained from France and
treated in this study, is morphologically distinct from
taxa presently reported from
Ilex
In recent years there have been several revisions
focused on either
calonectria
or its anamorph
genus,
cylindrocladium
(rossman 1979, Peerally
1991, crous & wingeld 1994, crous 2002). the
rst attempt to provide a molecular phylogeny of the
genus was that of schoch
et al
. (2001) based on
-tubulin dna sequences. this gene region, however,
proved insufciently variable to reliably distinguish all
species complexes in the genus (Kang
et al
. 2001a,
b, henricot & culham 2002, crous
et al
. 2004b,
2006a). since then, a concerted effort has been made
to generate a multi-gene phylogeny for taxa in the
genus, and identify the best suited gene for species
delimitation (lombard
et al
. 2009, 2010a–d). Based
on these ndings, a combination of
-tubulin dna
sequence data, supplemented with either calmodulin
or elongation factor 1-
, proved the most effective in
distinguishing all known taxa.
the aim of the present study was to compare the
new collections on
Ilex
from France to all species known
in the genus, using morphology and dna sequence
analysis of their
-tubulin and histone gene regions in
order to determine if it represented a novel taxon.
ate
Ia
ls
an
d
met
hods
solates
single ascospore isolates were obtained from leaves
of
Ilex aquifolium
as explained in crous & wingeld
(1994). Isolates were incubated on plates of 2 % malt
extract agar (mea), 2 % potato-dextrose agar (Pda)
and oatmeal agar (oa) (crous
et al.
2009c) for 7 d
at 25
c under continuous near-uv light, to promote
sporulation. reference strains are maintained in the
cBs-Knaw Fungal Biodiversity centre (cBs) utrecht,
the netherlands.
na isolation, amplication and analyses
genomic dna was isolated from fungal mycelium
grown on mea, using the ultracleantm microbial dna
Isolation Kit (moBio laboratories, Inc., solana Beach,
ca, usa) according to the manufacturer’s protocol.
two loci were amplied and sequenced as explained
in crous
et al
. (2004b) and lombard
et al
. (2010c),
namely, part of the β-tubulin gene (tuB), amplied with
primers t1 (o’donnell & cigelnik 1997) and cyltuB1r
(crous
et al
. 2004b); and part of the histone h3 gene
(hIs) using primers cylh3F and cylh3r (crous
et al
2004b). Part of the nuclear rdna operon spanning the
3’ end of the 18s nrrna gene (ssu), the rst internal
transcribed spacer (Its1), the 5.8s nrrna gene, the
second Its region (Its2) and the 5’ end of the 28s
nrrna gene (lsu) was amplied for some isolates as
explained in lombard
et al
. (2010c). the generated
sequences were compared with other fungal dna
sequences from ncBI’s genBank sequence database
using a blastn search; tuB sequences with high
similarity were added to the alignment and the result of
sequences of the other loci were used as conrmation
(not shown). the additional genBank sequences were
manually aligned using sequence alignment editor
v. 2.0a11 (rambaut 2002). Phylogenetic analyses
of the aligned sequence data were performed using
PauP (Phylogenetic analysis using Parsimony) v.
4.0b10 (swofford 2003) and consisted of neighbour-
joining analyses with the uncorrected (“p”), the Kimura
2-parameter and the hKy85 substitution models.
alignment gaps were treated as missing data and all
characters were unordered and of equal weight. any
ties were broken randomly when encountered. For
parsimony analyses, alignment gaps were treated as a
fth character state and all characters were unordered
and of equal weight. maximum parsimony analysis
was performed using the heuristic search option with
100 random (Its) or simple (lsu) taxa additions and
tree bisection and reconstruction (tBr) as the branch-
swapping algorithm. Branches of zero length were
collapsed and all multiple, equally parsimonious trees
were saved. the robustness of the trees obtained
was evaluated by 1 000 bootstrap replications (hillis
& Bull 1993). tree length (tl), consistency index
(cI), retention index (rI) and rescaled consistency
index (rc) were calculated. sequences derived in this
study were lodged at genBank (
),
the alignment in treeBase (
), and taxonomic novelties in mycoBank
; crous
et al
. 2004a).
morphology
characteristics in culture were determined after 7 d on
mea, Pda and oa (crous
et al.
2009c). morphological
descriptions were based on sporulating cultures on
synthetic nutrient-poor agar (sna) (nirenburg 1981,
lombard
et al
. 2009) and carnation leaf agar (cla)
(crous
et al
. 2009c). slide preparations were made
from sporulating cultures (sna for anamorph, cla for
teleomorph) in clear lactic acid, with 30 measurements
determined per structure, and observations made with
a nikon smz1500 dissecting microscope, and with
a zeiss axioscope 2 microscope using differential
interference contrast (dIc) illumination. colony
characters and pigment production were noted after
7 d of growth on mea, Pda and oa (crous
et al
2009c) incubated at 25 ºc. colony colours (surface
and reverse) were rated according to the colour charts
of rayner (1970).
calonectria lauri
sp. nov.
re
sul
Phylogeny
approximately 600, 480 and 680 bases were determined
for the isolates indicated in table 1 for tuB, hIs and
Its, respectively. of the β-tubulin gene, 522 bases
were used for phylogenetic analyses in the manually
adjusted alignment containing 32 isolates (including
the outgroup sequence). of these 522 characters
(including alignment gaps), 180 were parsimony-
informative, 47 were variable and parsimony-
uninformative, and 295 were constant. neighbour-
joining analysis using the three substitution models,
as well as the parsimony analysis, yielded trees with
exactly the same topologies. Parsimony analysis of
the alignment yielded a single most parsimonious tree
(tl 381 steps; cI 0.816; rI 0.953; rc 0.778),
which is shown in Fig. 1.
taxonomy
alonectria lauri
(vanderw.) lechat & crous,
comb. nov.
mycoBank mB517423
(Fig. 2)
Basionym
:
tetracytum
lauri
vanderw., Parasitica 1:
145. 1945. (as “
laurii
”).
candelospora
ilicicola
hawley, Proc. roy. Irish
acad. 31: 11. 1912. [non
calonectria ilicicola
Boedijn &
reitsma, 1950]
cylindrocladium ilicicola
(hawley) Boedijn & reitsma,
reinwardtia 1: 57. 1950.
typus
:
reland
, clare Island,
Ilex
aquifolium
,
hawley
, K (m)
61269!, holotype of
cy. ilicicola
, ImI 76542 isotype.
etherlands
south-east limburg, vijlenerbos, vijlen,
Ilex aquifolium
, aug.
1970,
h.a van der aa
, epitype cBs h-15110, ex-epitype culture
cBs 749.70.
ascomata
perithecial, solitary, scattered, subglobose
to ovoid, 450–550 µm high × 380–420 µm diam,
supercial, not obviously stromatic but difcult to
remove from the subtratum because basal cells of
ascomata remain immersed in the substratum, yellow to
brownish-yellow, dark-red at base, not changing colour
in 3 % Koh or lactic acid, warted except at ostiolar
region, ostiole papillate, composed of palisade-like,
cylindrical to narrowly ellipsoidal cells.
ascomatal wall
50–65 µm thick of two regions; outer region comprising
warts 50–55 µm thick, composed of globose to nearly
angular, thick-walled cells, 10–30 × 5–16 µm, yellow,
wall 1.5–2 µm thick; inner region 5–10 µm thick,
composed of attened, ellipsoidal cells, 12–18 × 3–5
µm, hyaline; warts globose to subglobose 25–40 × 15–
30 µm, yellow.
asci
clavate, long stipitate, 110–130 ×
17–22 µm, 8-spored, multiseriate.
ascospores
narrowly
fusiform with rounded ends, lightly curved, guttulate,
hyaline, smooth, (53–)60–86(–89) × 6.5–8(–9) µm,
3-septate, not conctricted at the septa or constricted
when overmature.
conidiophores
consisting of a
stipe bearing a penicillate arrangement of fertile
branches, a stipe extension, and a terminal vesicle;
stipe septate, hyaline, smooth, 40–150 × 3–5 µm; stipe
extensions septate, straight to exuous, 120–200 µm
long, 2.5–3 µm wide at the apical septum, terminating
in an obpyriform to ellipsoid vesicle, (5–) 7–8(–10)
µm diam.
conidiogenous apparatus
with primary
branches aseptate or 1-septate, 15–20 × 4–5 µm;
secondary branches aseptate, 8–15 × 4–5 µm; tertiary
branches aseptate, 10–15 × 4–5 µm, each terminal
branch producing 2–4 phialides; phialides doliiform
to reniform, hyaline, aseptate, 6–12 × 2.5–4 µm; apex
with minute periclinal thickening and inconspicuous
collarette.
conidia
cylindrical, rounded at both ends,
straight, (45–) 55–68(–73) × (4–)5–6(–7) µm (av. 60
× 5.5 µm), (1–)3-septate, lacking a visible abscission
scar, held in parallel cylindrical clusters by colourless
slime.
megaconidia
and
microconidia
unknown.
culture characteristics
: colonies on mea sienna to
brick on the surface, and sienna in reverse; sienna on
oa (surface); sienna to umber on Pda (surface), and
umber in reverse; chlamydospores on mea moderate,
occurring throughout the medium, with sparse to
moderate sporulation on aerial mycelium.
additional specimens examined
:
etherlands
, hilversum,
on leaves of
Ilex
aquifolium
, 11 nov. 2008,
w. gams
, cPc
15683 cBs 128031, cPc 15684, cPc 15685.
rance
Pressigny (52), on leaves of
Ilex aquifolium
, 05 dec. 2009,
a.
gardiennet
, ag09308, cBs h-20476
, c
ulture cPc 17978
cBs 126269; Forêt de chizé, villiers en Bois (79) on leaves
table 1.
collection details and genBank accession numbers of isolates of
calonectria lauri
included in this study.
train no.
ubstrate
ountry
ollector(s)
enBank accession no. (t
B,
, It
cPc 15683
leaves of
Ilex aquifolium
netherlands
w. gams
Fr694682, Fr694676, Fr694679
cBs 126269 cPc 17978
leaves of
I. aquifolium
France
a. gardiennet
Fr694683, Fr694677, Fr694680
cBs 553.69 ImI 299390
root of
Buxus sempervirens
Belgium
Fr694684, Fr694678, —
cBs 749.70
I. aquifolium
netherlands
h.a. van der aa
Fr694685, gq267250, gq280584
cBs: cBs Fungal Biodiversity centre, utrecht, the netherlands; cPc: culture collection of P.w. crous, housed at cBs; ImI: International
mycological Institute, caBI-Bioscience, egham, Bakeham lane, uK.
tuB: partial beta-tubulin gene; hIs: partial histone h3 gene; Its: Internal transcribed spacers 1 and 2 together with 5.8s nrdna.
echat
et al
Fig. 1.
single most parsimonious trees obtained from a heuristic search with 100 random taxon additions of the β-tubulin
sequence alignment. the scale bar shows 10 changes and bootstrap support values from 1000 replicates are shown at the
nodes. the tree was rooted to
cylindrocladiella lageniformis
(genBank ay725652).
calonectria lauri
sp. nov.
Fig. 2.
calonectria lauri
and its
cylindrocladium
anamorph.
a, B.
yellowish perithecia
in vivo
(a), and
in vitro
(B).
cylindrocladium
anamorph.
vertical section through perithecium, showing wall anatomy.
e.
ascospores.
F–
conidiophores.
I–
conidiogenous apparatus with phialides.
m.
ellipsoid to obpyriform vesicles.
n.
three-septate conidia. scale bars: a, B
200 µm, c, e–h, m 8 µm, d, J–l, n 10 µm, I 5.5 µm.
echat
et al
of
Ilex aquifolium
, 19 sept. 2006,
c. lechat
, cll696.
elg
um
gent, on roots of
Buxus sempervirens
, July 1969,
a. roos
ImI 299390 cBs 553.69.
notes
: the name
calonectria ilicicola
is already
occupied, and thus the next available epithet for this
species in
calonectria
is that of
tetracytum lauri
calonectria lauri
is phylogenetically closely related to
ca. citri
(known on
citrus
from Florida). morphologically
the two species can be separated in that
ca. citri
has
ellipsoid to pyriform or obovoid vesicles, and 3-septate
conidia that are slightly shorter and narrower, (25–)53–
60(–65)
3–4(–5) µm (crous 2002).
dI
scuss
the genus
calonectria
is based upon
calonectria
pyrochroa
(on
Platanus
leaf litter, France,
lectotype BPI), which rossman (1979) found to be
indistinguishable from
ca. daldiniana
(on
magnolia
grandiora
leaf litter, Italy, holotype ro). a separate
collection from decaying leaves of
Pittosporum
undulatum
collected in madeira (cuP-mm 2407)
produced a
cylindrocladium
anamorph with clavate
vesicles, which later led rossman (1983) to conclude
that the oldest anamorph epithet that could be linked
to
ca. pyrochroa
was
c. ilicicola
Brayford & chapman (1987) reported a wilting
disease of
laurus nobilis
in nurseries on the Isles
of scilly, and later on
arbutus andrachnoides
and
gaultheria shallon
in west devon, uK. the causal
organism was identied as
c. ilicicola
, but incorrectly
linked to the teleomorph name,
ca. ilicicola
. Based
on a molecular comparison of ex-type strains, crous
et al
. (1993) showed
ca. ilicicola
was the teleomorph
of
c. parasiticum
, a major pathogen associated with
cylindrocladium black rot of peanut. In a later study,
crous & wingeld (1994) accepted the relationship
between
ca. pyrochroa
and
c. ilicicola
, as there
were no cultures available at the time to refute this
proposed link (crous 2002). Following a revision of
cylindrocladium
strains in the cBs culture collection,
crous
et al.
(2006a) discovered a strain linked to a
specimen that closely matched the type of
c. ilicicola
and subsequently designated cBs 749.70 (on
Ilex
aquifolium
, the netherlands) as ex-epitype strain for
c. ilicicola
. sequence data derived from the ex-epitype
strain, and morphology, proved to be identical to that
of the new collection obtained from France (Figs 1–2),
conrming it to be
c. ilicicola
however, isolate cBs 126269 produced a
calonectria
teleomorph in culture, which is clearly
distinct from
ca. pyrochroa
. the latter species (and
its synonyms) have scarlet-red perithecia, which turn
purple in 2 % Koh (rossman 1979). the present
collection (on the host and on cla in culture), forms
yellow to brownish yellow perithecia that do not
discolour in Koh (except at the perithecial base).
the teleomorph of
c. ilicicola
could therefore not be
ca. pyrochroa
as currently accepted (lombard
et al.
2010c). Because the name
ca. ilicicola
is already
occupied by the pathogen causing cylindrocladium
black rot of peanut (crous
et al
. 1993), a new name,
ca. lauri
, is proposed for this species, which appears
to occur commonly on
laurus
,
Ilex,
as well as several
other hosts in europe (Brayford & chapman 1987).
Presently no cultures are available of
ca. pyrochroa
and further collections will have to be made from
Platanus
leaf litter in France to help clarify the
morphology of its
cylindrocladium
anamorph.
aPPen
IX
In the recent treatment of the genus
calonectria
lombard
et al
. (2010c) allocated the name
cylindrocladium canadense
to
calonectria
as
ca.
canadensis
(J.c. Kang, crous & c.l. schoch) l.
lombard, m.J. wingf. & crous, but overlooked the
older existing name,
ca. canadensis
(ellis & everh.)
Berl. & voglino. a new combination is required to
resolve this homonym as follows:
alonectria canadiana
l. lombard, m.J. wingf.
& crous,
nom. nov.
mycoBank mB517424
Basionym
:
cylindrocladium canadense
J.c. Kang,
crous & c.l. schoch, syst. appl. microbiol. 24: 210.
2001.
calonectria canadensis
(J.c. Kang, crous & c.l.
schoch) l. lombard, m.J. wingf. & crous, stud. mycol.
66: 56. 2010, non
calonectria canadensis
(ellis & everh.)
Berl. & voglino, addendum to syll. Fung. 4: 212. 1886.
ac
Kn
owl
dg
ement
the authors thank the technical staff, arien van Iperen
(cultures), marjan vermaas (photo plates), and mieke starink-
willemse (dna isolation, amplication and sequencing) for
their invaluable assistance. drew minnis (usda, Beltsville,
usa) is also thanked for bringing the homonym associated
with epithet “
canadensis
” to our attention. Finally, we thank
alain gardiennet for the supply of specimens.
reFe
en
Boesewinkel hJ (1982)
cylindrocladiella
, a new genus to
accommodate
cylindrocladium
parvum
and other small-
spored species of
cylindrocladium
.
canadian Journal of
Botany
60
: 2288–2294.
calonectria lauri
sp. nov.
Brayford d, chapman au (1987)
cylindrocladium
ilicicola
on
cuttings of evergreen ornamental shrubs in the uK.
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: 413–414.
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groenewald Jz, wingeld mJ (2005)
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© 2010 International mycological association
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ow to describe a new fungal species
Keith a. seifert
and amy y. rossman
Biodiversity (mycology), eastern cereal and oilseed research centre, agriculture & agri-Food canada, ottawa, ontario K1a
0c6 canada; corresponding author e-mail: Keith.seifert@agr.gc.ca
systematic mycology & microbiology laboratory, usda-ars, rm. 246, B0101a, 10300 Baltimore ave., Beltsville, md 20705,
usa
for the International commission on the taxonomy of Fungi, www.fungaltaxonomy.org
abstract:
the formal requirements and best practices for the publication
of descriptions of new fungal species are discussed. expectations for dna
sequences and cultures are considered. a model manuscript offers one
possible approach to writing such a paper
article info:
submitted: 9 october 2010; accepted: 15 october 2010; Published: 2 november 2010.
nt
roduc
tI
every fungal species is unique. therefore, every
description of a fungal species is also unique.
the morphological, physiological, ecological, and
molecular diversity in fungi means that descriptions
and illustrations differ from one taxonomic group
to another. there are no formal standards for the
description and illustration of species, but there are
some formal (or ‘legal’) requirements for proposing
names that are imposed by the International code of
Botanical nomenclature (IcBn; mcneill
et al.
2006).
Furthermore, community standards of scientic rigor
are enforced by editors and reviewers.
For the beginner, it is useful to have models to assist
with the preparation of descriptions and illustrations. In
this paper, formal requirements and best practices that
should be considered for any description are outlined,
and a model manuscript for describing a new species
is provided. several ‘tricks of the trade’ and cautionary
notes are also included.
additional hints can found in the now somewhat
dated code of Practice developed by the IctF (sigler &
hawksworth 1987), and the guidebook for mycologists
by hawksworth (1974). although not exclusively
concerned with fungi, the book by winston (1999) also
provides a valuable perspective.
For
ma
l r
qu
ement
the International code of Botanical nomenclature
(IcBn) governs the naming of fungi. this is a complex
document, but you should read the relevant articles of
the code for exact wording of the regulations. the IcBn
is updated every six years, after each International
Botanical congress, and is available on the world
wide web (see references). the most recently
published code must be followed, and previous codes
are considered obsolete. although there have been
discussions about a possible independent mycological
code, or a Biocode covering all organisms, these are
still in the dialogue stage. the Phylocode (cantino &
de queiroz 2010) promotes phylogenetically based
non-linnaean nomenclature and is not relevant for the
description of new species as presented here.
In taxonomic language, species must be ‘effectively’,
‘legitimately’ and ‘validly’ published. these three words
have special meanings in taxonomic terminology (as
do ‘illegitimate’ and ‘invalid’), and they should not be
used in other ways in taxonomic manuscripts.
to be
effectively
published (arts. 29–31), i.e. to
be made available, a description of a new species
must be published in a journal that can be read
by the scientic community. species published
in newspaper articles, or mentioned in oral
presentations at scientic meetings, for example,
are not considered effectively published. at present,
Key words:
culture collections
herbaria
International code of Botanical nomenclature
latin diagnoses
molecular phylogenetics
Ima Fu
gus
volu
me
1
o 2: 109–116
eifert &
ossman
descriptions of new species cannot be published
exclusively
on electronic media such as cd-roms,
dvds or on the Internet. effective publication is
only accepted by the IcBn when at least two paper
copies are archived in a scientic library or other
despositary; however, we feel that many more
printed copies should be deposited, preferably on
each continent. several mycological journals now
publish articles including new species online and
deposit printed copies in permanent libraries to
meet effective publication requirements; the date
of publication of the paper copy remains the ofcial
date, not the often earlier date of publication on-
line. academic Phd or other theses presented to
universities as part of degree requirements are not
considered effective publications, even if copies
are distributed to other universities, unless they
have an IsBn number or clearly state that they are
to be intended effective publications (art. 30.5).
to be
legitimately
published (art. 6), i.e. legally
acceptable, a new species must have a unique
binomial, i.e. it cannot have the same species
epithet as another species validly published in the
same genus.
to be
validly
published (arts 32–45), a new species
must be clearly designated as a new species, have
a latin diagnosis, and a single, clearly designated
and permanently preserved ‘type’, which xes
the application of the name. usually, the type is
preserved in a public herbarium (holmgren
et
al.
1990) that will make the material available to
interested scientists, has an on-line database of
holdings, and that will assign a unique accession
number, which you will then quote to clearly identify
the type specimen. If there duplicates of the type
specimen, or cultures derived from it, these must
be explicitly distinguished from the holotype; the
others are referred to as ‘isotypes’ or as ‘ex-type
cultures’. to safeguard against loss and to facilitate
access by other mycologists, isotypes should
be deposited in several herbaria, on different
continents if possible.
there are many nuances to the concept of a type
(arts 7–10). For a new species, you will normally
propose a ‘holotype’. the holotype is usually a
dried, physiologically inert specimen (or a dried
culture) that includes all diagnostic morphological
characters of the species. For microscopic fungi,
several separate individuals can be present as long
as they are part of one sample collection, i.e. made
at one time in a precise locality. living cultures are
now allowed as holotypes (art. 8.4), but only if they
are preserved in a metabolically inactive state (i.e.
by lyophilization or in liquid nitrogen), ideally in an
internationally recognized culture collection (see
world Federation for culture collections, s.d.).
this practice is not widely used in mycology except
for yeasts. cultures can be dried for use as type
specimens (constantinescu 1983); take care to dry
an uncontaminated, optimally developed culture,
not an old one that has started to degenerate. If
you wish to designate a microscope slide as a type,
or to include one with the type, it is worth the effort
to make a permanent preparation using the method
described by Kohlmeyer & Kohlmeyer (1972).
nF
or
ma
l r
qu
ement
to successfully describe a new species, the author
must convince readers (especially reviewers and
editors) that:
the species is really undescribed.
the species is being described in the most
appropriate genus, and if molecular data are
available, the genus including the new species
remains monophyletic.
the species is described, illustrated or otherwise
characterized adequately so that it can be
recognized again by subsequent workers.
a sufcient number of cultures or specimens were
examined. Ideally, new species should be described
based on more than one specimen or culture, and
some journals demand this. with limited material
but clear taxonomic novelty, the author may be able
to write a convincing argument for the proposal of
a new species that is acceptable to editors and
reviewers.
manuscripts that do not satisfy these criteria should
not be published until they can be met. normally, peer
reviewers and editors assess whether these criteria
are satised.
In recent decades, partly as a result of the spirit
of the un convention on Biological diversity (cBd),
taxonomists are encouraged, and sometimes legally
required by national laws, to deposit type specimens
in public reference collections in the country where
the specimens were originally collected. If cultures
were isolated, there may be a similar requirement
or expectation from the originating country. cultures
of new species should be deposited in two or three
internationally recognized public culture collections,
which agree to make them available to other
researchers. this latter practice is a condition for valid
publication of new bacterial species (lapage
et al.
1992), and is enforced as an editorial policy by some
journals that publish new fungal species.
It is critical that type specimens and cultures are
available to other taxonomists who want to study
and compare them with other material. the IcBn
ow to describe a new fungal species
recommends (rec. 7a), but cannot enforce, that type
specimens be deposited in public institutions with
a policy to allow scientic researchers to examine
material. a frequent problem is the unavailability
of type or other specimens from under-resourced
collections, or collections not curated by a mycologist.
some historical collections may never be sent on loan
because of their fragility and extreme importance.
some nations forbid specimens or cultures from being
sent abroad, under their interpretations of the cBd. a
parallel situation is the reluctance of some industrial
researchers (e.g. pharmaceutical companies) to
allow access to cultures that they own. Balancing the
question of open access to specimens or cultures
against the legal or proprietary interests attached to
that material is complicated, but must be considered
when depositing type specimens. the scientic process
demands reproducibility, and if this cannot be assured,
responsible journals will not allow publication. the risk
for the authors of species that cannot be re-examined
or studied by other taxonomists is that the species
will not be accepted by future scientists, and that the
efforts and work of the authors of such species will be
wasted and ignored.
almost all mycological journals now require
that names and certain nomenclatural information
for all newly proposed fungal taxa, including new
combinations, be deposited in mycoBank (crous
et al.
2004), and that the mycoBank accession number be
included as part of the description. while the minimum
requirements are the deposit of the latin diagnosis and
information on the type specimen, it is good practice
to include as much information as possible, including
illustrations, the english description, and links to
molecular data, because this critical information will
then be freely available to all scientists.
re
qu
ement
s
or cul
ur
s
an
ol
cul
r d
ata
at present, there are no formal requirements that you
must have cultures or dna sequences of a fungus
before you can describe a new species. nevertheless,
dna sequences and cultures signicantly enhance the
value of a species description and you should make
every effort to generate these resources.
mycologists describing new species should
indicate whether they have tried to obtain cultures
and what methods were attempted. not all species
can be cultured using currently available methods,
but for most groups, culturing should be relatively
straightforward after consulting the literature on related
species. cultures are essential for some groups where
the modern morphological taxonomy is based entirely
on
in vitro
characters, especially hyphomycetes such
as
alternaria
,
aspergillus, cladosporium, Fusarium,
Penicillium
and
trichoderma
; new species in these
genera should not be described in the absence of
cultures or sequences. For other ascomycetes, single-
spore cultures may yield unexpected anamorphs that
will allow the description of a more complete life cycle.
dna sequences can be usually obtained from all
but the most recalcitrant materials (such as fossils).
there is a growing expectation that descriptions of
all new species should be accompanied by molecular
data, driven in part by the need for dna sequence data
to integrate new species into molecular phylogenies.
the growth of molecular ecology, which relies on
databases of reference sequences for identication
of environmental sequences, has also highlighted the
importance of sequencing all newly described species.
therefore, an increasing number of journals, editors
or reviewers insist on cultures or dna sequences
before a manuscript is accepted for publication. If
you do not have cultures or dna sequences, your
new species can only be published in a journal with
different policies. we encourage mycologists who
lack resources for culturing or dna sequencing to
collaborate with colleagues who can assist with this,
often in return for co-authorship.
eifert &
ossman
nt
roduc
tI
the paragraphs of the introduction should be
presented in a logical order, i.e. how they tell the best
story. remember, most people reading a scientic
paper will only read the Introduction and discussion,
so the account of your discovery should be complete
and complementary between these two sections.
normally, you will tell the reader about the larger
projects (if any) that led to the discovery of the new
species, provide information on its ecological niche
and associated organisms, and give references to
complementary publications where appropriate.
Information should be provided about the taxonomy
of genus in which the species is being described,
such as the number of species already known, a brief
review of recent revisions or monographs, perhaps
discussion of controversies about the generic concept,
and something about the biology of the species. Be
diligent about citing all relevant literature.
If you have dna sequence data, usually one
paragraph will provide a brief review of the existing
state of molecular knowledge for the group your
species belongs to, and explain to the reader what
experiments you have done with your own species to
t it into the existing context.
another paragraph gives information about why
the new species is suspected to be undescribed.
this should be basic information that leads into the
formal part of the paper. some of this information
may be repeated and presented in more detail in the
discussion.
some papers may require a longer introduction.
manuscripts including molecular or physiological data
are often longer. situations where the new fungus
could be described in one of several different genera
also may require a longer introduction. sometimes
this will include a more extensive review of historical
literature, or discussions of taxonomic characters of
particular signicance. you must judge whether this
information is most suitable in the introduction, which
the reader will read before the description itself, or if it
is more logical to place it in the discussion.
usually the Introduction concludes with a statement
like, “therefore, we decided that our fungus represents
an undescribed species, which is described and
illustrated here as
genus species
sp. nov.”
ate
Ia
ls
an
d
met
hods
this section is often omitted from taxonomic papers
that include only morphological data, but it is preferable
to include as many details as possible. some of the
following subheadings and paragraphs might be
appropriate.
ollecting and eld sites
how the specimens were collected and transported
to the laboratory and preserved or incubated prior to
examination may be relevant. Information about specic
eld sites is usually given in the ‘material examined’
section, but it might be appropriate to provide more
details here if they are relevant to understanding the
species.
ultures and media
give recipes for the isolation media employed, or cite a
reference for the media. give brand names for extracts
used, such as malt extract, yeast extract, and the agar
used for the media. describe the inoculation methods,
incubation conditions such as temperature and lighting
mod
l m
an
uscr
IPt
title:
genus species
sp. nov., an undescribed fungus (
taxonomic
group
) from
habit
in
country
with
interesting biological properties
abstract:
If your title is sufciently engaging, a prospective reader will probably look next at
the abstract. the abstract should include all details necessary for the reader who does not
have access to the whole article (i.e. someone looking at the abstract only on-line or in an
abstract journal) so that they will know whether it is worth their time or money to obtain the
full article. when describing a new species, you should include a summary of the diagnostic
characters of the new species, especially the spore characters and dimensions. make sure
to include information about where your fungus was found and what it was growing on. If you
have molecular data, it is useful to mention what genes you have sequenced, and what this
information tells us about the fungus, such as what family or order it belongs to, and what are
the most closely related species. mention if a key to related species or comparative synoptic
table is included, a feature that will increase potential readership.
article info:
submitted: dd month yyyy; accepted: dd month yyyy; Published: dd month yyyy.
Key words:
these should not
reproduce words in the
title. It is useful to list
special techniques used
in the description, e.g.
electron microscopy, dna
sequencing, or chemo-
taxonomic methods.
ow to describe a new fungal species
regime, and length of incubation before examination.
determine the cardinal growth temperatures (minimum,
optimum and maximum) if possible. list the culture
collections where the cultures are maintained, with
accession numbers, either here or in a table.
Isolation methods
explain all isolation methods used, such as explants
from sporophores or infected host tissues, removal of
spores directly from sporulating structures, transfer
of actively discharged spores from Petri dish lids or
spore prints, etc. If the substrate was treated before
isolation, e.g. by some form of surface sterilization,
these methods should be explained. give the recipes
for the isolation media employed including any
antibacterial compound added, or cite a reference
for those media. describe the incubation conditions
such as temperature and lighting conditions. If single-
spore cultures were prepared, a good practice to be
undertaken when possible (choi 1999, crous 2002),
describe how this was done.
microscopy
give details of the kind of microscope used, including
the illumination systems (e.g. phase contrast,
differential interference contrast), the mounting media
and stains employed for routine examination and for
making measurements, and how many structures
of each microscopic character were measured. a
similar section, with details on dehydration protocols,
xation, staining, etc. should be given for electron
microscopy methods, if these were used. Permanent
microscopic preparations should be deposited with
the type if possible, which will make your observations
reproducible to later taxonomists, and limit the amount
of material they might use on specimens in future
studies.
techniques used for illustrations are often given
here, but may also be briey mentioned in the gure
legends. For example, whether drawings were made
with a drawing tube, a camera lucida, or by freehand,
and the type of camera used for photography, may
be relevant. It is essential to describe techniques
used for image enhancement of digital photographs,
such as the sharpening lters of Photoshop or other
imaging software, whether separate photographs were
combined into one image, or whether colours have
been altered (microscopy society of america, 2003).
modication of contrast has always been standard
practice in photography and need not be mentioned.
Physiological tests or chemotaxonomic
methods
For yeasts, substrate utilization and other physiological
tests are standard parts of taxonomic descriptions. For
some lichen groups, spot-tests with a standard set of
chemical reagents are essential. these methods must
be described carefully. If chemotaxonomic methods,
such as isozyme analysis or secondary metabolite
proling, were employed, complete methods should be
given to allow the resulting data to be reproduced.
na extraction, P
cr
amplication,
na
sequencing, and phylogenetic analysis
note what kind of material was used for dna
extraction, such as cultures, single spores, or naturally
occurring tissues, and give the details of the kits and
methods used for dna extraction. For dna isolations
from natural tissues, note whether procedures were
repeated to reduce the chance of sequencing a
contaminant or associated organism. give the details
of Pcr amplication prole used, the concentrations of
reagents used in the reactions, and information on the
brand and model of thermocycler used. Provide details
of any methods used to clean or otherwise process
the Pcr products before sequencing. If Pcr products
or other dna fragments were cloned for sequencing,
provide the relevant information for this procedure.
For the dna sequencing, provide details of the cycle
sequencing prole used, the concentration of reagents
used, the brand and model of the thermocycler, the
relevant information about the sequencing chemistry
used, and the brand and model of dna sequencer
employed. If you used a dna sequencing service, list
it here. cite the literature where Pcr and sequencing
primers were rst published. If you designed the
primers yourself, give details of how you did this.
Include details about how you did your phylogenetic
analyses, including literature citations for sequences
originating from published or unpublished work of
colleagues, the software used for analysis, and the
details of the parameters used for the analysis. diverse
methods of phylogenetic analysis are available. while
the choice of methods is largely a matter of preference,
there is a general agreement that it is critical to employ
measures of condence, such as the bootstrap,
Bayesian posterior probabilities, the ‘decay index’ or
congruence among independent data sets. If you have
used several sequences from a previously published
study, you should cite that study so that it is properly
credited (seifert
et al.
2008).
re
sul
many descriptions of new species will not have a
results section because all of the data are included in
the taxonomy section. however, if some experiments
were done with the fungus, such as physiological tests
or tests of antibiotic resistance, then these data should
be presented in the results section, in the same order
as the methods are described in the materials and
methods section. often, the results of physiological
tests are given in a table.
eifert &
ossman
general results of dna sequencing analyses are
usually given in this section. these can include details
of the length and composition of the dna fragments, and
the results of comparisons with other sequences (e.g.
Blast searches). If phylogenetic trees are presented,
the tree statistics may be given in this section, or
otherwise in the gure legends. describe what the data
shows, e.g. that the sequence is similar to those in a
particular genus, family or order, or that the sequence
is apparently unique, but leave the conclusions derived
from this for the discussion section. mention support
values for the critical nodes in your tree based on
bootstrap frequencies or other measures of condence.
If you have done analyses using different phylogenetic
methods, or have analyzed several genes, then
comparison of the results is appropriate here, but leave
the conclusions for the discussion section.
taX
my
genus species
authors
, sp. nov.
mycoBank: mBxxxxxxx.
Figs xxx–xxx
the latin diagnosis comes rst and is essential for
valid publication. It should list the diagnostic characters
only, i.e. those that separate it from similar ones, and
not be a complete translation of the description. many
journals now restrict the latin to a few lines. use
published latin diagnoses for models, then if possible
have yours checked by a mycologist or botanist
competent in scientic latin. If there is no such expert
in your own department, consult with colleagues in
other institutions. stearn’s Botanical latin (1992) is a
valuable resource for preparing latin diagnoses.
holotypus:
collection acronym, accession number.
Immediately after the latin diagnosis, clearly and
explicitly indicate the details of the single accession
that will serve as holotype. If you wish to list isotypes
or extype cultures here, be certain that they are clearly
distinguished from the holotype or you may have
problems with the validity of your new name (art. 37.7).
a full description follows. think of the descriptions and
illustrations together as providing a blue-print for your
new species. If someone wanted to build an exact scale-
model of the fungus, they should be able to do so using
your paper. where both asexual and sexual states (i.e.
anamorph and teleomorph) occur, the description of
the sexual state is traditionally given rst. In general,
a taxonomic description begins at the broadest scale
and moves towards the nest. macroscopic characters
are described next. use a colour standard, such as
ridgway (1912), rayner (1970), Kornerup & wancsher
(1984), or munsell (1905 and many subsequent editions)
to accurately describe colours. most details will be
visual, but sometimes texture and odour are useful
additions. when describing microscopic characters, be
as complete as possible about shape, colour, texture
and size for every component of the fungus. there are
standard terminologies for shape; check
ainsworth &
Bisby’s dictionary of the Fungi
(Kirk
et al.
2008, and
earlier editions, see under ‘shapes’) as a starting
point. Be aware that the terminology for describing
three dimensional shapes sometimes differs from the
terminology used to describe two dimensional shapes.
the full range of observed dimensions should be given
for all structures. means should be calculated for all
dimensions in the description (at least the spores),
along with a statistical measure of variation in these
measurements, such as standard error, standard
deviation, condence intervals or percentile ranges.
If you have isolated a culture, its features are
usually included in a separate paragraph. For some
fungi, colony characters are described rst; for others,
this information follows the morphological description.
at a minimum, give the growth rates on a specied
medium and explain the temperature and light regime,
and give a general impression of the colour and texture
of the colonies. If the fungus sporulates in culture, it
can be very helpful to compare the sizes and shapes
of the microscopic structures to what occurred on
the natural specimen. the detail employed in culture
descriptions varies considerably from one taxonomic
group to another, and you should consult published
descriptions for the group you are working with.
If you have done any physiological tests, or
determined cardinal temperatures, this information is
normally put in a separate paragraph in the description.
It can also be put into a table or in a graph, which may
be easier for a reader to follow.
substrate or host
: Provide a summary of the known
hosts or substrates as a separate paragraph, especially
if you have more than one specimen.
distribution
: summarize the known disttibution, by
continent, country (and by province or state for larger
countries), along with relevant information on the
biome, climactic or geological conditions.
etymology
: explain the meaning or derivation of the
species epithet, and note the language of origin of the
word(s) used for constructing the epithet. avoid species
epithets with more than ve syllables and those similar
to other epithets in the same genus. epithets that are
descriptive are most helpful, but names can be derived
from any source, including acronyms or the name of a
names of author or authors, and their abbreviations, should
follow the standards of Kirk & ansell (1992).
ow to describe a new fungal species
person, usually someone involved in the discovery of
the fungus or a mycologist who has made a signicant
contribution to the subject.
additional material examined
: most journals have
a specic format for this part of the paper. For all
specimens and cultures, including isotypes and ex-
type cultures, list country: Province/state/territory/
county/township, city/town/Park, specic location
details (gPs coordinates, including altitude), substrate
or host, date of collection and/or isolation, collector’s
name, collector’s number (if any), herbarium or culture
collection abbreviations and accession numbers
where the material is preserved. often, some of this
information is instead provided in a table including
genBank accession numbers for dna sequences.
dI
scuss
the discussion completes the story that began in the
Introduction. there are many ways to write this section,
but one rule is not to introduce new data that should
have been introduced in the ‘results’ or ‘taxonomy’
sections. mixing of the results and discussion in one
section is generally frustrating for the reader, unless
the section is very short.
It is often useful to start the discussion by
summarizing the diagnostic features of the fungus you
have described.
In a separate paragraph, you should compare your
fungus to other similar species of the same genus,
stating clearly how they differ. many papers will include
either a diagnostic key or synoptic table (or both), either
including all species of a smaller genus, or only the
most similar species of a larger genus, to assist the
reader in understanding why the new species is distinct.
If you have dna sequence data, there are often
several paragraphs of discussion relating to what they
show or do not show. discuss how the data support
the classication of your fungus and its recognition as
a distinct species. If you have done analyses using
different phylogenetic methods, or have analyzed
several genes, compare the results and explain your
conclusions carefully, especially if contradictory
evidence occurs in the different data sets or analyses.
It is often useful to conclude the paper with
discussion of the biology of the new species, either
demonstrated by the experiments done in the paper or
as an extension of eld observations. a limited amount
of speculation on this topic is usually tolerated by
reviewers and editors.
Illus
atI
the IcBn does not require that new species descriptions
have illustrations (Fig. 1), but few journals allow
the description of a new species without them, with
the exception of yeasts. usually, at least some of
the illustrations will be of the holotype specimen or
culture. the package of illustrations should present the
complete concept of the species to the reader so that
they can condently identify your fungus. Provide visual
information at several different size scales, from general
habitat to the most detailed microscopy. expectations vary
among different taxonomic groups, but often a mixture of
photographs and line drawings are included. Individual
photographs are visual data that are proof of observations.
electron micrographs are generally unhelpful to facilitate
identication, but scanning electron micrographs may
be necessary for documenting spore ornamentation or
tissue types, and transmission electron micrographs
may be necessary to prove ultrastructural observations
Fig. 1.
genus species
(specimen or culture number, noting whether it is type). a series of photographs of the fungus, showing the eld habit,
the appearance under the dissecting microscope, and microscopic photographs showing taxonomically relevant structures and preferably some
developmental sequence. all illustrations should include scale bars. In this particular example:
Fig. 1.
sarcinella questierii
(daom 235813).
Black growth on living leaves of
sp.
Black conidia on leaf surface.
development of
dictyoconidia from conidiogenous hyphae, with hyphopodia (h) arising from the same hyphae (differential interference contrast). Bars: a 1 cm,
B 25 µm, c 10 µm. B–c, composite images created with combinez (hadley 2006).
eifert &
ossman
of spore production (especially types of conidiogenesis).
line drawings are interpretations; they are not proof,
but can present a complex concept in one image and
be extremely helpful for someone trying to identify your
species. with colour photographs now published with
increasing frequency, and the relative economy and
ease of digital photography and computerized imaging,
the preparation of informative illustrations is one of the
most exciting aspects of describing a new species. Find
the best model illustrations for the group of organisms
where your species ts, and then do better!
ac
Kn
owl
dg
ement
In addition to the usual acknowledgements for a scientic
paper (e.g. mentors, sources of funding), it is traditional
to acknowledge any taxonomic specialists that you
have consulted during your decision to describe a new
species. similarly, it is customary to acknowledge the
curators of any collections who have provided specimens
or cultures that was used in your study. For this paper,
we wish to thank the other members of the International
commission on the taxonomy of Fungi, especially david
hibbett and david hawksworth, and the peer reviewers,
for valuable comments on earlier drafts of this paper. the
nal sentence usually identies funders of the research.
reFe
en
do your best to cite the relevant historical and
modern literature, including revisions, monographs,
identication keys, and molecular studies that you
have consulted. reviewers often see submitted papers
in some elds of taxonomy that only cite literature
more than 25 years old. study the guidelines of the
journal carefully for citation formats.
cantino Pd,
queiroz K de (2010)
International code of
Phylogenetic nomenclature.
version 4c.
choi y-w, hyde Kd, ho wh (1999) single spore isolation of
fungi.
Fungal diversity
: 29–38.
constantinescu o (1983) dried reference fungal cultures.
a review and a simpler technique.
Bulletin of the British
mycological society
17
: 139–143.
crous Pw (2002) adhering to good cultural practice (gcP).
mycological research
106
: 1377–1378.
crous Pw, gams w, stalpers Ja, robert v, stegehuis g
(2004) mycoBank: an online initiative to launch mycology
into the 21st century.
studies in mycology
50
: 19–22.
hadley a (2006)
combinez.
version 5. Published by the
author.
hawksworth dl (1974)
mycologist’s handbook: an introduction
to the principles of taxonomy and nomenclature in the fungi
and lichens.
Kew: commonwealth mycological Institute.
holmgren, PK, holmgren nh, Barnett lc (1990)
Index
herbariorum.
Part I.
the herbaria of the world.
th
edn.
[regnum vegetabile vol. 120.] utrecht: Bohn, scheltema
& holkema.
Kirk Pm, ansell ae (1992)
authors of Fungal names:
a list of authors of scientic names of fungi, with
recommended standard forms of their names, including
abbreviations.
[Index of Fungi supplement.] wallingford,
uK: caB International.
Kirk Pm, cannon PF, minter dw, stalpers Ja, eds (2008)
ainsworth and Bisby’s dictionary of the Fungi
. 10
th
edn.
wallingford, uK: caB International.
Kohlmeyer J, Kohlmeyer e (1972) Permanent microscopic
mounts.
mycologia
64
: 666–669.
Kornerup a, wanscher Jh (1984)
methuen handbook of
color.
rd
edn. london, uK: methuen.
lapage sP, sneath Pha, lessel eF, skerman vdB, seeliger
hPr, clark wa (eds) (1992)
International code of
nomenclature of Bacteria and satutes of the International
committee on systematic Bacteriology and statutes
of the Bacteriology and applied microbiology section
of the International union of microbiological societies.
Bacteriological code (1990 revision).
washington, dc,
usa: american society for microbiology.
mcneill J, Barrie Fr, Burdet hm, demoulin v, hawksworth
dl, marhold K, nicolson dh, Prado J, silva Pc, skog
Je, wiersema Jh, turland nJ, eds (2006)
International
code of Botanical nomenclature (vienna code)
. [regnum
vegetabile vol. 146.] liechtenstein: gantner verlag,
ruggell.
microscopy society of america (2003)
msa policy on digital
imaging.
www.microscopy.org/resources/digital_imaging.
cfm
munsell ah (1905)
a color notation
. Boston: g. h. ellis.
(for a pop-up computer
version).
rayner rw (1970)
a mycological colour chart
. Kew:
commonwealth mycological Institute.
ridgway r (1912)
color standards and color nomenclature.
washington, dc, usa: published by the author.
seifert Ka, crous Pw, Frisvad Jc (2008) act: appropriate
citation of taxonomy.
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59
(3): 4;
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sigler l, hawksworth dl (1987) International commission on the
taxonomy of Fungi (IctF): code of practice for systematic
mycologists.
mycologist
: 101–105;
mycopathologia
99
3–7;
microbiological sciences
: 83–86.
stearn wt (1992)
Botanical latin: history, grammar, syntax,
terminology and vocabulary
. 4
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& charles.
winston Je (1999)
describing species: practical taxonomic
procedure for biologists.
new york: columbia university
Press.
world Federation for culture collections. s.d.
© 2010 International mycological association
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hat is
Johansonia
Pedro w. crous
, robert w. Barreto
, acelino c. alfenas
, rafael F. alfenas
and Johannes z. groenewald
cBs-Knaw Fungal Biodiversity centre, uppsalalaan 8, 3584 ct utrecht, the netherlands; corresponding author e-mail:
p.crous@cbs.knaw.nl
departemento de Fitopatologia, universidade Federal de viçosa, 36.570 viçosa, mg, Brazil
abstract:
the bitunicate ascomycete genus
Johansonia
is presently treated as a member of
saccardiaceae
, a family regarded as
incertae sedis
within the
ascomycota
. recent collections on
leaves of a leguminous host,
dimorphandra
mollis,
in mato grosso, Brazil, led to the discovery of a
new species of
Johansonia
, described here as
J.
chapadiensis.
Based on dna sequence data of the
nuclear ribosomal dna (lsu),
Johansonia
is revealed to represent a member of
dothideomycetes
capnodiales
. although its family could not be resolved, it clustered basal to
schizothyriaceae
and
mycosphaerellaceae
, and could well represent a species of
saccardiaceae
. dna sequence data of
other members of
saccardiaceae
would be required, however, to conrm this classication.
article info:
submitted: 19 october 2010; accepted: 24 october 2010; Published: 2 november 2010.
nt
roduc
tI
the genus
Johansonia
is based on
J. setosa
(saccardo
1889), a species known from leaves of
sapindaceae
collected in south america (müller & von arx 1962).
due on its supercial discoid ascomata, bitunicate asci
and hyaline, 1-septate ascospores, müller & von arx
(1962) were of the opinion that the genus belonged
to
schizothyriaceae
. In a later study, however, von
arx & müller (1975) again placed it in
saccardiaceae
suborder
dothideaceae
in
dothideales
, based on
the ascomata having an epithecium of branched
hyphal elements. Barr (1993) again placed it in
Phillipsiellaceae
in
loculoascomycetes
, while
lumbsch & huhndorf (2007) concluded that it was
a member of
saccardiaceae
, a family they regarded
as
incertae sedis
in
ascomycota
. In recent studies
on
dothideomycetes
(schoch
et al
. 2006, 2009), no
mention is made of
Johansonia
. as there are presently
no dna sequence data represented for any species
of
Johansonia
in genBank, its taxonomic position
remains obscure.
during a recent visit to Brazil, we collected fresh
material of a species of
Johansonia
on leaves of a
legume. the aims of the present study were, therefore,
to identify the species of
Johansonia
, and at the same
time to see if the taxonomic position of the genus could
not be resolved.
ate
Ia
ls
an
d
met
hods
Isolates
leaves bearing ascomata were soaked in water for
approximately 2 h, after which they were placed in
the bottom of Petri dish lids, with the top half of the
dish containing 2 % malt extract agar (mea; crous
et al
. 2009c). ascospore germination patterns were
examined after 24 h, and single ascospore and conidial
cultures established as described earlier (crous
et
al.
1991, crous 1998). colonies were subcultured
onto potato-dextrose agar (Pda), oatmeal agar (oa),
mea (crous
et al.
2009c), and incubated at 25
under continuous near-ultraviolet light to promote
sporulation. reference strains are maintained in the
cBs-Knaw Fungal Biodiversity centre (cBs) utrecht,
the netherlands.
na isolation, amplication and
analyses
genomic dna was isolated from fungal mycelium
grown on mea, using the ultracleantm microbial dna
Isolation Kit (moBio laboratories, Inc., solana Beach,
ca, usa) according to the manufacturer’s protocols.
the primers v9g (de hoog & gerrits van den ende 1998)
and lr5 (vilgalys & hester 1990) were used to amplify
part of the nuclear rdna operon spanning the 3’ end
of the 18s rrna gene (ssu), the internal transcribed
spacer 1, the 5.8s rrna gene, the internal transcribed
spacer 2 (Its) and the rst 900 bases at the 5’ end of
the 28s rrna gene (lsu). the primers Its4 (white
et
Key words:
dothideomycetes
Johansoniella
Its
lsu
systematics
Ima Fu
gus
volu
me
1
o 2: 117–122
rous
et al
teratosphaeriaceae
Fig. 1.
the rst of 1000 equally most parsimonious trees obtained from a heuristic search with 100 random taxon additions of the lsu sequence
alignment. the scale bar shows 10 changes, and bootstrap support values from 1000 replicates are shown at the nodes. the novel sequence
generated for this study is shown in
. Branches present in the strict consensus tree are thickened and important lineages are colour-coded.
Johansonia
al
. 1990) and lsu1Fd (crous
et al
. 2009b) were used
as internal sequence primers to ensure good quality
sequences over the entire length of the amplicon. the
Pcr conditions, sequence alignment and subsequent
phylogenetic analysis followed the methods of crous
et al
. (2006, 2009a). sequences were compared with
the sequences available in ncBI’s genBank nucleotide
(nr) database using a megablast search and results
are discussed in the relevant species notes where
applicable. Based on the Blast results, the novel
sequence was added to the alignment of Frank
et al
2010 (treeBase study s10547). alignment gaps were
treated as new character states. sequences derived in
this study were lodged at genBank, the alignment in
treeBase (
), and
taxonomic novelties in mycoBank (
; crous
et al
. 2004).
the morphological description is based on preparations made
from host material in clear lactic acid, with 30 measurements
determined per structure, and observations made with a nikon
smz1500 dissecting microscope, and with a zeiss axioscope
2 microscope using differential interference contrast (dIc)
illumination. colony characters and pigment production were
noted after 2 wk of growth on mea, Pda and oa (crous
. 2009c) incubated at 25 ºc. colony colours (surface and
reverse) were rated according to the colour charts of rayner
(1970). growth characteristics were studied on mea plates
approximately 1700 bases, spanning the Its and lsu
regions, were obtained from the sequenced culture. the
lsu region was used in the phylogenetic analysis for the
generic placement (Fig. 1) and Its to determine species-
level relationships (see notes under species descriptions).
the manually adjusted lsu alignment contained 77 taxa
(including the
Phaeobotryosphaeria visci
outgroup sequence)
and, of the 731 characters used in the phylogenetic analysis,
171 were parsimony-informative, 96 were variable and
parsimony-uninformative and 464 were constant. only the
rst 1000 equally most parsimonious trees were retained
from the heuristic search, the rst of which is shown in
Fig. 1 (tl 776, cI 0.485, rI 0.839, rc 0.407). the
phylogenetic tree of the lsu region (Fig. 1) show that the
taxonomy
crous, r.w. Barreto,
alfenas & r.F. alfenas,
sp. nov.
: named after the location where the holotype was
Johansoniae brasiliensis
morphologice similis, sed ascosporis
m, discernitur.
mato grosso, chapada dos guimarães, on leaves
dimorphandra
(
leguminosae
; False Barbatimao), 18 aug.
P.w. crous, a.c. alfenas & r. alfenas
, (cBs h-20484 –
holotypus, cultures ex-holotype cPc 18475, 18474 cBs 128068).
leaves
with brown spots, but ascomata also occurring on
dead and green leaf areas.
mycelium
supercial, consisting of
septate, branched, medium brown, verruculose to warty, 2–5
µm wide hyphae.
ascomata
on lower leaf surface, supercial,
situated on a hyphal stroma (occurring loosely on surface),
discoid, dark brown, up to 300 µm diam, 200 µm high.
exciple
15–20 µm diam, consisting of 3–6 layers of brown
textura
angularis
to
textura globulosa
.
asci
in parallel layer, bitunicate
with ocular chamber, sessile, narrowly ellipsoid to subcylindrical
or clavate, 8-spored, 32–45 × 11–19 µm.
Paraphyses
intermingled among asci, hyaline, branched, septate, 1.5–2.5
µm wide, becoming somewhat darkened and branched towards
the apical region, forming an epithecium.
ascospores
hyaline,
thick-walled, medianly 1-septate, thick-walled, constricted at the
septum, prominently guttulate, (13–)15–19(–24) × (5–)6–7 µm.
ascospores
after 24 h on mea germinating from both ends, with
germ tubes parallel to the long axis of the spore, developing
lateral branches; ascospores remaining hyaline, prominently
constricted, not distorting, 5–7 µm wide.
setae
brown, erect,
straight to curved, separate and surrounding ascomata, thick-
walled, brown, smooth, with basal t-cell devoid of rhizoids, with
slight taper towards apical cell, which is thin-walled, pale brown,
and acutely to obtusely rounded, 5–10-septate, 130–260 × 4–5
µm; 2.5–3 µm wide at apical septum.
culture characteristics
: colonies spreading, erumpent, with
sparse aerial mycelium and diffuse, submerged margins.
on Pda surface pale mouse-grey (centre), olivaceous-grey
(middle) with smoke-grey to cream outer region; reverse
olivaceous-grey; colonies reaching 5 mm diam. on oa
smooth, somewhat slimy, surface umber to dark mouse-
grey; margin diffuse, reaching 8 mm diam. on mea, surface
smoke-grey; reverse greyish-sepia, reaching 10 mm diam
additional specimen examined
Pernambuco: Poço do
macaco, on
sp., 18 sept. 1960,
osvaldo soares de silva
: the generic name
Johansonia
is based on
J. setosa
a species described from living leaves of
collected in south america. the genus is characterised by
having loose, supercial, discoid ascomata situated on a
hyphal stroma, and an exciple covering the bitunicate asci.
, which are intermingled among asci, are hyaline,
rous
et al
branched, septate, and become somewhat darkened and
branched towards the apical epithecium. ascospores are
hyaline and 1-septate. ascomata are surrounded by brown,
erect, straight to curved, septate setae (müller & von arx
1962). Based on these features,
J. chapadiensis
is a typical
morphologically,
J. chapadiensis
closely resembles
J.
brasiliensis
(Fig. 3). the two species can be distinguished in
that ascospores of
J. chapadiensis
are smaller, (13–) 15–19(–
24) × (5–)6–7 µm, than those of
J. brasiliensis,
(18–24 × 6–7
µm). Furthermore, asci of
J. chapadiensis
are narrowly ellipsoid
to subcylindrical or clavate, 32–45 × 11–19 µm, while those of
J. brasiliensis
are broadly ellipsoid, obovoid to subcylindrical,
never clavate, and larger, 40–58 × 15–23 µm. Finally, setae
in
J. chapadiensis
are more acutely rounded, 2.5–3 µm diam
at the apical septum, while those of
J. brasiliensis
are bluntly
rounded, and wider at the apical septum, 4–6 µm diam.
although there are only 12 species of
listed in
Index Fungorum, von arx & müller (1975) were of the opinion
Johansoniella maranhensis
represented a further species
. Batista
et al.
(1966) introduced the monotypic
generic name
(
), based
J. maranhensis
, which they regarded as closely related
. morphologically, the description appears
Fig. 2.
(cBs h-20484
– holotype).
leaves colonised with
ascomata on leaf surface from
above (B, c), below (d), and a vertical section though an ascoma (e).
F,
germinating ascospores.
vertical section through ascoma.
ascospores. Bars: B, c 300 µm; d, e 150 µm; g, h 20 µm; F, I–l 10 µm.
Johansonia
somewhat different, as the ascomata are described as having
an upper wall layer (though this may be an epithecium), and
setae around the ascomata, as well as on top of the ascomata.
regardless of these supposed differences, von arx & müller
(1975) treated
in synonym with
. a
re-examination of the holotype specimen (urm 47621) found
it to be depauperate, and hence the status of
could not be resolved in the present study.
an attempt to make a key to the species described to date
based on published descriptions has not proven feasible, as
too many species either have similar ascospore dimensions,
or are insufciently known. Based on published descriptions,
most taxa only seem distinct if aspects such as dimenions
of the ascospores, asci and setae are combined with host
and distribution. however, as most taxa have been recorded
once only, the value of these characters seems unreliable,
and hence a key would only be feasible once the specimens
of all described taxa have been re-examined to help resolve
recent studies focused on elucidating the higher order
phylogeny of
dothideomycetes
(schoch
et al
. 2009) and
(crous
et al
. 2009b) did not treat
, as
the present collection represents the rst known cultures of
this genus. von arx & müller (1975) were of the opinion that
belonged to
, a treatment accepted
by lumbsch & huhndorf (2007), though they regarded it as
a family
incertae sedis
. Based on the
dna phylogeny generated in the present study (Fig. 1), we
can reveal that
belongs to the
), and is closely related to
and
. however, whether it is a member of the
(von arx & müller 1975, lumbsch & huhndorf
2007), could not be conrmed, as presently there are no
known cultures of this family available for comparison. Parts
saccardiaceae
have been transferred to
von arx & müller (1975), and thus its close relationship to the
suggests
a likely family for
this genus, pending further collections and study.
we thank the technical staff, arien van Iperen (cultures), marjan
vermaas (photo plates), and mieke starink-willemse (dna isolation,
amplication and sequencing) for their invaluable assistance. the
curator of urm (recife, Brazil), dr leonor m. maia, is acknowledged
available for study.
arx Ja von, müller e (1975) a re-evaluation of the bitunicate
ascomycetes with keys to families and genera.
studies in
Barr me (1993) redisposition of some taxa described by J.B. ellis.
Batista ac, Bezerra Jl, cavalcanti aaas da silva (1966)
, um novo gênero de
atas do
Instituto de micologia
universidade Federal de Pernambuco,
crous Pw (1998)
spp. and their anamorphs
associated with leaf spot diseases of
crous Pw, gams w, stalpers Ja, robert v, stegehuis g (2004)
mycoBank: an online initiative to launch mycology into the 21st
century.
crous Pw, groenewald Jz, risède J-m, simoneau P, hyde Kd (2006)
species and their
anamorphs:
crous Pw, groenewald Jz, summerell Ba, wingeld Bd, wingeld
mJ (2009a) co-occurring species of
teratosphaeria
on
ascoma on leaf.
asci and ascospores. Bars: a 300 µm; B–d 10 µm.
rous
et al
crous Pw, schoch cl, hyde Kd, wood ar, gueidan c, hoog
gs de, groenewald Jz (2009b) Phylogenetic lineages in the
crous Pw, verkley gJm, groenewald Jz, samson ra (eds)
Fungal Biodiversity
. [cBs laboratory manual series
1
crous Pw, wingeld mJ, Park rF (1991)
mycosphaerella nubilosa
a
Frank J, crous Pw, groenewald Jz, oertel B, hyde Kd, Phengsintham
P, schroers h-J (2010)
microcyclospora
and
novel genera accommodating epiphytic fungi causing sooty
hoog gs de, gerrits van den ende ahg (1998) molecular diagnostics
of clinical strains of lamentous basidiomycetes.
lumbsch ht, huhndorf sm (eds) (2007) outline of ascomycota -
müller e, arx Ja von (1962) die gattungen der didymosporen
Beitrage zur Kryptogamenora der schweiz
11
rayner rw (1970)
a mycological colour chart
. commonwealth
mycological Institute, Kew.
saccardo Pa (1889)
Johansonia setosa
sylloge Fungorum
(abellini)
schoch cl, shoemaker ra, seifert Ka, hambleton s, spatafora Jw,
crous Pw (2006) a multigene phylogeny of the
schoch cl, crous Pw, groenewald Jz, Boehm ewa, Burgess
et al.
(2009). a class-wide phylogenetic assessment of
vilgalys r, hester m (1990) rapid genetic identication and
mapping of enzymatically amplied ribosomal dna from several
white tJ, Bruns t, lee J, taylor J (1990) amplication and direct
sequencing of fungal ribosomal rna genes for phylogenetics.
: Innis ma, gelfand dh, sninsky JJ, white tJ (eds),
Protocols: a guide to methods and applications
: 315–322.
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Int
roduc
tI
Biological diversity (biodiversity) encompasses the variety
of life forms occurring in nature, from the ecosystem to the
genetic level, as a result of evolutionary history (wilson
1992). the idea that fungi form a kingdom distinct from plants
and animals gradually became accepted only after whittaker
(1969). Presently, the “fungi” as a mega-diverse group span
three kingdoms, most belonging to the
(
while others are classied in the
and
) (cavalier-smith 1998, James
et al.
2006b).
the word “fungi”, lower case and not in italics, is commonly
used as a collective term for organisms traditionally studied
by mycologists from all three kingdoms (hawksworth 1991).
the myxomycetes have also been traditionally studied by
mycologists (everhart & Keller 2008, rojas & stephenson
2008), and are included here.
estimates for the number of fungi in the world range up to
ca. 13.5 m species (mcneely
et al.
1990, hawksworth 1991,
2001, hawksworth & Kalin-arroyo 1995, hyde 1996, hyde
1997, tangley 1997, groombridge & Jenkins 2002, Brusca
& Brusca 2003, rossman 2003, crous
et al.
2006, adl
et al.
2007, Kirk
et al.
2008). It might be expected that the predicted
numbers of fungi on earth would have been considerably
greater than the 1.5 m suggested by hawksworth (1991),
which is currently accepted as a working gure although
the 10
edition of
ainsworth & Bisby’s
dictionary of the
et al.
2008) provided a total of 98 998 for the
number of fungal species accepted to date (excluding taxa
treated under
and
). Kirk
et al.
(2008)
reported 1 039 species chromistan fungal analogues
1 165 as protozoan in which 1 038 are regarded as protozoan
fungal analogues:
(
dictyostelia, myxogastria, Protostelia
, cercozoa
) which were previously treated as
egypt’s geographical position at the junction between two
large continents (africa and asia), and its inclusion as part
of the mediterranean basin, has indelibly inuenced both the
people and the biota of the country socially, economically
and biologically. egypt is part of the sahara of north africa,
it has an area of about 1 m km
, divided by the river nile
into a western part including the libyan desert (681 000
) and an eastern part comprising the eastern desert (223
000 km
), and the sinai Peninsula (61 000 km
). the nile
basin, comprising the valley in the south (upper egypt) and
nile delta in the north (lower egypt), forms a riparian oasis
(40 000 km
) that constitutes the densely inhabited farmlands
the history, fungal biodiversity, conservation, and future
perspectives for mycology in egypt
ahmed m. abdel-azeem
Botany department, Faculty of science, university of suez canal, Ismailia 41522, egypt; e-mail: zemo3000@yahoo.com
abstract:
records of egyptian fungi, including lichenized fungi, are scattered through a wide array
of journals, books, and dissertations, but preliminary annotated checklists and compilations are not
all readily available. this review documents
the known available sources and compiles data for more
than 197 years of egyptian mycology. species richness is analysed numerically with respect to the
systematic position and ecology. values of relative species richness of different systematic and
ecological groups in egypt compared to values of the same groups worldwide, show that our knowledge
of egyptian fungi is fragmentary, especially for certain systematic and ecological groups such as
agaricales
,
glomeromycota
, and lichenized, nematode-trapping, entomopathogenic, marine, aquatic
and coprophilous fungi, and also yeasts. certain groups have never been studied in egypt, such as
trichomycetes
and black yeasts. By screening available sources of information, it was possible to
delineate 2281 taxa belonging to 755 genera of fungi, including 57 myxomycete species as known from
egypt. only 105 taxa new to science have been described from egypt, one belonging to
chytridiomycota
47 to
ascomycota
, 55 to anamorphic fungi and one to
Basidiomycota
article info:
submitted: 10 august 2010; accepted: 30 october 2010; Published: 10 november 2010.
Key words:
checklist
distribution
fungal diversity
lichens
mycobiota
species numbers
Ima Fu
gus
volu
me
1
o 2: 123–142
ahmed m. abdel-azeem
Kassas (2002) mentioned four gaps related to biodiversity
knowledge: the number of species on earth; the diversity
of the less conspicuous organisms such as fungi, bacteria,
algae, and protozoa; the role played by each species among
biotic elements of ecosystems; and the human ability to
documentation of the egyptian fungi may be dated
back to 4500 B.c., when ancient egyptians produced a
number of hieroglyphic depictions of plants (many of which
are psychedelic) on walls and within texts throughout
egypt. temples with countless pillars are shaped like huge
mushrooms with tall stems, umbrella caps, and mushroom
engravings distributed all over the country (Fig. 1). these
are shaped like
sporophores, and some like
. others look like bracket fungi and are decorated
with pictures of an incredible variety of plants (arthur 2000).
In the egyptian Book of the dead, the Papyrus of ani
(Budge 1967), mushrooms are called “the food of the gods,”
studies on fungi in egypt started at the beginning of the
century on lichens (e.g. delile 1813a, b, nylander 1864,
1876, müller 1880a–c, 1884, stizenberger 1890, 1891). In
the early 20
century, sickenberger (1901) and steiner
(1893, 1916) provided information for collections of lichens
from egypt in the 19
and early 20
century. In the
, delile (1813a) presented a scientic study of
egyptian fungi into the early19
century (mouchacca 2008), in
which he described the gastromycete now known as
Phallus roseus
; Fig. 1) which he had collected in
damietta and assiut in 1798 and 1799, respectively. It should
be noted that some early works repeat previous records,
sometimes ambiguously as a result of the misinterpretation
of synonyms and erratic use of infraspecic ranks; further,
in the case of sickenberger, misspellings of scientic names
By the beginning of the 20
century, special attention
was being given to phytopathogenic fungi on wild and
domesticated plants of economic importance (e.g
1902, reichert 1921, Fahmy 1923, shearer 1924, Briton-
Jones 1922, 1923, 1925, Bishara 1928, melchers 1931, sirag
Both reichert and melchers are considered the pioneer
scientists in the documentation of egyptian fungi. Israel
reichert (1891–1975) went to study in germany. here he
obtained his doctorate on
die Pilzora Ägypten
in which 237
species were recognized, of which 42 were new to science.
unfortunately, none of his specimens were retained in
egypt, or if they were, there is no record of their whereabouts
today. however, earlier material collected before 1914 was
present in the Botanisches museum in Berlin-dahlem,
which reichert used when compiling his list of 1921, but it is
In 1927 leo e. melchers went to egypt at the invitation of
the egyptian minister of agriculture as chief mycologist for 18
months. he met a series of difculties such as there being no
records available on the occurrence, distribution, or dates of
any mycological observations conducted previously by any
investigator in egypt, and no mycological reference collection
existing in the country. his checklist, however, included 345
species of fungi, especially those causing plant diseases
no studies were carried out on the soil fungi until the
1930s, yet it was to be expected that, in such a country with
rich agricultural traditions, knowledge of these fungi should
have attracted considerable interest. research on egyptian
soil fungi was probably commenced by younis salem
sabet
(1898–1977). sabet graduated in 1921 from the high school of
agriculture (now the Faculty of agriculture of cairo university),
and soon after was sent to england to study botany at the
university of london, where he obtained a Bsc (hons) in 1925.
after his return, he joined the ministry of agriculture in the Plant
Breeding section. In 1927 he was appointed lecturer in Botany
in the faculty of science of the newly established egyptian
university, and in 1935 published his pioneering study, which
was followed by many other publications (sabet 1936, 1938,
1939a). his exploration led to the discovery of three taxa which
were described later as new to science.
sabet took the initiative in the establishment of some
scientic organisations, and served as a member and
president for several years in some others. Particularly of note
were the egyptian academy of sciences, egyptian Botanical
society, egyptian science union, egyptian association for
scientic culture, society of applied microbiology, egyptian
Phytopathological society, society for the history of science,
near the end of the 1930s, new aspects of mycological
research were introduced into egypt by several investigators
such as mycorrhizal fungi (mostafa 1938, sabet 1939b,
1940, 1945, yousef 1946); biocontrol (mostafa & gayed
1953), rhizosphere (montasir
et al.
1956, naim
et al.
1957),
air (saad 1958, zaki 1960), and stored seeds and grains
In 1956 late magdy a. ragab (department of Botany,
Faculty of agriculture, university of cairo) isolated 16 new
species for the rst time from soil, water and some plant
however, the credit for initiating real research concerned
with egyptian fungi must be given to abdel-al h. moubasher
Fig. 1. a.
mushroom-like pillars
(upper part), which are
common in egyptian temples. B. description of
Phallus roseus
by
mycology in egypt
(Botany department, Faculty of science, assiut university;
Fig. 2). In the early 1960s, with colleagues and students, he
broadened the scope of mycological research in egypt by
conducting many studies on fungi. these included aspects
such as: cellulose-decomposition, thermophily, osmophily,
seed and grain mycobiota, phylloplane fungi, mycotoxins, and
aquatic fungi. moubasher, with his colleagues and students,
have published more than 150 scientic papers to date, and
in 1993 he published his major contribution to mycology in
the arabic world
the lavishly illustrated
soil fungi of qatar
and other arab countries
(moubasher 1993). he also invited
outside specialists to run courses from the 1980s and trained
many Phds students. specialists included colin Booth and
el-abyad & abu-taleb (1993) summarized the habitat
diversity of egyptian fungi, and in 1997 the late samy m.
el-abyad (Botany department, Faculty of science, cairo
university; Fig. 2) presented his pioneering attempt to update
the checklist of egyptian fungi: 1 246 species were recorded
of which 173 were referred to
, 41 to
, 222
, 143 to
and 667 to
. different ecological and
taxonomic groups were not separated cited in the checklist,
such as protozoan fungal analogues (
), lichens, yeasts, aquatic and marine
fungi, entomopathogenic fungi, nematophagous fungi, and
mycorrhizal fungi. a large numbers of taxa, either reported
in routine isolations or as novel taxa, are completely absent
from this list. this may be due to his inability to trace the
majority of references, which is actually the main reason
why updated information documenting the fungi of egypt
was needed today. amongst records lacking in the el-abyad
(1997) checklist are seven
species (melchers 1931),
chaetomium gelasinosporum
and
c. uniporum
(aue & müller
c. mareoticum
(Besada & yusef 1969),
(lundqvist 1969),
Podospora aegyptiaca
(lundqvist 1970),
thermoascus aegyptiacus
(udagawa &
ueda 1983), and
gelasinospora hippopotama
(Krug
et al.
In addition to the previous efforts of reichert (1921),
melchers (1931), el-abyad & abu-taleb (1993), and el-
abyad (1997), several other studies have added to the
documentation of egyptian fungi: moubasher (1993), lado
(1994), mouchacca (1995, 1999, 2001a, b, 2003a, b, 2004,
2005, 2008, 2009a, b; Fig. 2), moustafa & abdel-azeem
(2005a, b, 2006, 2010), moustafa (2006), and seaward &
the late abdel razak abo-sedah organized the
second african regional mycological congress, in cairo
in 1992, under the auspices of the Ima committee for the
Fig. 2.
a selection of prominent mycologists who have contributed greatly to our knowledge of mycology in egypt.
a.
abdel-al h. moubasher.
samy m. el-abyad.
Jean mouchacca.
abdul-wahid F. moustafa.
Farida t. el-hissy.
F.
younis s. sabet.
Israel reichert.
youssef
a. youssef.
ahmed m. abdel-azeem
development of mycology in africa. then in 1993 he founded
the regional center for mycology and Biotechnology (rcmB)
in al-azhar university, cairo. the major tasks of this centre
were the establishment of a fungal culture collection, the
application of fungi in public health, agriculture, environment
and industry, and supporting researchers as well as research
projects. the centre actively participated in organizing further
african regional and international conferences and meetings
in cairo in 1994, vancouver in 1994, zimbabwe in 1995,
cairo in 1996 on “regulations of fungal activities”, and again
in cairo in 1999 on “Fungi and the environment”. the center
had collaborative agreements with the former International
mycological Institute (ImI) in the uK, and collaborative
activities with egyptian universities as well as with others
in the uK, south africa, mauritius, zimbabwe and austria.
the centre also initiated and published
the african Journal
of mycology and Biotechnology
from 1993 to 2001, which
contained numerous contributions by egyptian authors, and
From the beginning of 2005 to the end of 2007, the
Biodiversity monitoring and assessment Project (Biomap) had
as its primary objective to develop and strengthen biodiversity
research, monitoring and assessment across egypt. In this
project an extensive e-database was established to map the
distribution of species across egypt, and document up to
as mentioned above, the information concerning the fungi
of egypt is still incomplete and cannot be fully documented
without an updated checklist of all taxa reported for the
country. the p
resent contribution assesses the diversity of
fungi in egypt. In addition,
major groups of fungi are discussed
briey to highlight the extent of their diversity, followed by
examples of habitats that are unique and deserve greater
attention. t
hese data show that
the present contribution is
a preliminary one concerning the diversity of egyptian fungi,
and therefore this summation is intended to enhance our
knowledge of, and stimulate research into, the fungi of egypt.
mate
an
the present contribution is based on an exhaustive revision of
the available literature and sources of the egyptian fungi reported
from the 19
th
century to the present, including dissertations,
published papers, compilations and checklists.
name corrections,
authorities, and taxonomic assignments of all taxa reported in
this article were checked against the
Index
Fungorum
database
). In addition, websites of international
mycological centres such as the atcc (usa) (
),
caBI (uK)
<194.203.77.76/grc/index.htm>
, cBs (the
netherlands) (
), mucl (Belgium)
cabri.org/
htdig/index-ebrcn.html>
)
and the catalogue of the culture
collection of the assiut university mycological center (aumc
2010) were also consulted. the systematic arrangement in the
present article follows
Kirk
et al.
(2008).
this study extended to more than eight years in
documenting and updating the information on egyptian
fungi. a
ll results of the present study can be checked against
the number of fungi recorded in egypt is 2 281 species,
out of which 105 taxa have been described from egypt as
new to science: one in
chytridiomycota
, 47 in
56 in anamorphic fungi, and one in
. reichert
introduced 24 of the new taxa, representing 24.7 % of the
novel taxa, followed by Jean mouchacca and his colleagues
(laboratoire de cryptogamie, muséum national d’histoire
naturelle, Paris), who described 18 new species (17.1 %
of the total), and abdul-wahid F. moustafa (Fig. 2) and his
colleagues and students at the suez canal university who
contributed 11 new taxa.
the kingdom
contains 115 000 known species.
they are extremely diverse in their cell structure, patterns
of nutrition, metabolic needs, reproduction, and habitat. this
kingdom contains a grab-bag of organisms that do not t
into the other kingdoms.
are extremely difcult to
classify so for the purpose of this survey, they are grouped
by their nutritional patterns. Protozoan fungal analogues
are heterotrophic and most are decomposers that feed on
dead plants and animals by endocytosis (Kendrick 2000).
according to Kirk
et al.
(2008) there are about 1 165 fungal
protozoan analogues described. slime moulds are a small
and relatively homogenous group of eukaryotic organisms,
and these are referred to as
(
). In
egypt the slime moulds have never been the target of any
widescale study (lado 1994, stephenson & stempen 1994),
except for the pioneer study of abdel-raheem (2002) on
abdel-raheem (2002) reported 20 species belonging
to 17 genera in his rst inventory of the protozoan fungal
analogues (
myxomycota
) of upper egypt from wood,
bark of living and dead trees and leaf litter. exhaustive
examination of all available literature concerning protozoan
fungal analogues in egypt led to the discovery of reports of
Protostelium irregulare
(as “
irregularis”
; olive & stoianovitch
1969) and
eidamella spinosa
(Kowalik & sadurska 1973).
the protozoan fungal analogues occurring on decaying
wood, bark, leaf litter and papyrus papers presently amount
to 57 species belonging to 25 genera. For more details
refer to the PBI: global Biodiversity of eumycetozoans
) and
Farghaly (2008). In addition,
three species representing three
genera of
cercozoa
(previously
Plasmodiophoromycota
have been recorded:
Plasmodiophora
,
spongospora,
and
woronina
. no dictyostelid cellular slime moulds are so far
known from egypt (cavender
et al.
2010).
mycology in egypt
the kingdom
) is a collection of
eukaryotic, walled microorganisms that produce heterokont,
wall-less cells in their life-cycles, including some fungal-
like groups that are not considered to be ancestors of
any members of the
(lutzoni
et al.
2004). Kirk
et al.
(2008) estimated the chromistan fungal analogues as 1 039
known species and included the phyla
, and
along with some taxa of
the late Farida t. el-hissy (Botany department, Faculty of
science, assiut university; Fig. 2) was the founder of aquatic
mycology research in egypt.
el-hissy and her students
published more than 60 papers on this topic.
however, the
plant pathogenic
have been the target of many
research investigations since 1921, and in the present study,
186 taxa of chromistan fungal analogues were recorded, of
which 172 belong to 40 genera of
. Four species
and two genera of
labyrinthista
were recorded, while
are represented by six species within
three genera. For more details refer to el-helaly
et al
. (1963,
1966), ali hassanein
et al
. (1972), Khallil
et al
. (1995), and
this phylum was once considered part of the chytrids.
however, most of the true chytrids (
produce a limited mycelium while
usually make extensive mycelia. thus, they supercially
resemble the water moulds to which they were thought to
have been afliated. like the chytrids,
neocallimastigomycota
are the only members of the
fungi in which motility has been retained. In overall growth
habit, the blastocladiomycetes tend to be eucarpic, in which
there is an extensive vegetative growth habit in which some
part of the organism participates in reproduction (asexual
and sexual). members of this phylum do exhibit a complete
alternation of generation between a haploid gametophyte
and a diploid sporophyte (Barr 1990, James
et al.
2006a).
et al.
(2008) give a world total for
of
179 species. In egypt, 27 species and one variety belonging
to seven genera of
were found in this
study. For more details see ragab (1956), yusef (1964), gad
et al.
(1967), gad & sadek (1968), el-hissy (1974), el-hissy
et al.
(1997), el-abyad (1997), shoulkamy
et al.
(2001), and
are a phylum of fungi that reproduce
through the production of motile spores (zoospores), typically
propelled by a single, posteriorly directed agellum. these
organisms, often referred to as chytrid fungi or chytrids,
have a global total
of approximately 1 000 described species
et al.
2006a). Based on biochemical characteristics,
including chitin in cell walls, the α-aminoadipic acid lysine
synthetic pathway, and storage carbohydrates (i.e. glycogen),
Bartnicki-garcia (1970) classied
as true
fungi and this is supported by current molecular studies
et al.
2007). In the past some authors considered the
chytrids as a transitional group between protists and fungi
because of their production of motile zoospores (Barr 1990).
et al.
(2008) give the number known
as
the study of gaertner (1954) on
of
africa is considered one of the pioneer mycological studies
in egypt. however, the real start of research on chytrids in
egypt must be credited to samy Kamel mohamed hassan
(minia university) who obtained his Phd from the university
of warsaw for work on chytrids and aquatic fungi in 1982.
later, hassan and mohamed abdel-wahab el-naghy (minia
Intensive revision of the nomenclature showed that 84
species belonging to 32 genera of
were
recorded in egypt. For more details see el-naghy
et al.
(1985,
1987), hassan (1991a-d, 1993), hassan & Fadl-allah (1991),
are a particularly ecologically diverse group
of fungi, occurring as saprobes (
), harmless
inhabitants of arthropod guts (
), plant mutualists
forming ectomycorrhizas (
endogonales
), and pathogens of
animals, plants, amoebae, and especially other fungi (all
and some
are mycoparasites)
(James & o’donnell 2007). conversely, some
have a negative economic impact as they cause storage rots
or plant diseases, while others can cause life-threatening
opportunistic infections in diabetic, immuno-suppressed, and
immuno-compromised patients. In addition, several species
cause serious human infections (de hoog
according to Kirk
et al.
(2008) the total world number of
is 1 065 species. data collected from previous
studies show the
in egypt to be fragmentary
because members belonging to this group either have long
been overlooked or simply reported as rare taxa during
abdel-Kader (1973) carried out a pioneering study in
which he was able to isolate 11 species from a range of soils
collected from various egyptian localities. the second most
relevant study is probably that of al-alfy (1995) who reported
21 species from various substrates
including soil, dung,
stored seeds and grains, and the phyllosphere. In his recent
contribution on
in egypt, moustafa (2006)
reported 33 species, out of which nine were considered new
revision of all available data showed that
zygomycota
in
egypt comprises 70
taxa including eight varieties and seven
special forms within 35 genera. In addition,
absidia
aegyptiaca
(sartory
et al.
1939) is omitted from the list, as no living or
other type of authentic material is apparently preserved;
furthermore the name was not validly published as it lacked a
ahmed m. abdel-azeem
latin diagnosis (mouchacca 1995). For more information on
egyptian
zygomycota
refer to Kharboush (1969a, b), Besada &
yusef (1968), abdel-rahman
et al.
(1990), moubasher (1993),
el-abyad & abu-taleb (1993), swelim
et al.
(1994), mouchacca
(1995), el-abyad (1997), abdel-azeem (2003), moustafa
(2006), ali & Ibrahim (2008), afy
et al.
(2009), and moubasher
et al.
(2010).
currently comprises 169 described
species (Kirk
et al.
2008). the phylum is not as diverse as
other phyla of fungi with only three families and such a modest
number of species. however, they make up for this uniformity
by being among the most abundant and widespread of all
fungi. as far as we know, all species of
are
mutualistic with plants, forming endomycorrhizas. although
there are various types of mycorrhizas, involving different
fungal and plant symbionts, the arbuscular mycorrhiza type
is the most widespread occurring in around 80 % of plant
the pioneering work of mostafa (1938) and sabet (1939b,
1940, 1945; Fig. 2) is now accepted as the starting point of
research on egyptian
glomeromycota
(Kelley 1950, abdel-
moneim & abdel-azeem 2009). these studies were followed by
many other investigations concerned mainly with the ecology
and physiology of endomycorrhizas in egypt,
viz.
Fares
(1986), Ishac
et al.
(1986), abdel-Fattah (1991), aboulkhair &
el-sokkary (1994), mankarios & abdel-Fattah (1994), abdel-
Fattah & mankarios (1995), abdel-Fattah & rabie (1995),
abdel-Fattah
et al.
(1996), abdalla & abdel-Fattah (2000),
abdel-Fattah (2001), and abdel-azeem
et al.
(2007).
however, surveys of egyptian
glomeromycota
are limited,
and had never been the sole target of any study until Fares
(1986) conducted a survey of vesicular arbuscular mycorrhizas,
followed by agwa (1990) on mycorrhizas and nodulation in
some egyptian plants. after 10 years, agwa (2000) studied the
arbuscular mycorrhizal fungi associated with medicinal plants as
glomales
in egypt (I)”. agwa & abdel-Fattah (2002) followed up
their work “
glomales
in egypt (II)” as an ecological view of some
saline affected plants in the delta of the mediterranean coast. a
study of the distribution of
glomales
in the egyptian Protectorates
was published by agwa & al-sodany (2003) as “
glomales
in
egypt (III)”, which surveyed the distribution and ecology in some
plants in the el-omayed Biosphere reserve. later, other relevant
studies were carried out by several investigators such as el-
zayat
et al.
(2007) and abdel-moneim & abdel-azeem (2009) on
the wadi allaqi and saint Katherine Protectorate, respectively.
recently, mansour (2010) screened 71 soil and root samples for
endomycorrhizas in north sinai and adopted some of them as
biocontrol agents against fusarium-wilt of tomato.
eight genera and 19 species have been recorded in
egypt since 1938:
acaulospora, entrophospora, gigaspora,
glomus, Paraglomus, sclerocysti, scutellospora
. Both
Paraglomus occultum
were recorded and never cited in any publication related
to egyptian
. For more details see sabet
lichens are unique associations composed of two to three
different organisms living together in a mutualistic relationship
in which the fungal partner forms the external structure. the
name used is that of the fungal parter, and the photosynthetic
partner or partners have independent scientic names.
estimates for the number of lichen fungi worldwide vary, but
a draft global checklist has 18 882 names of lichen-forming
egyptian lichens have received the attention of many
researchers since the early 1800s (delile 1813a, b, nylander
1864, 1876, müller 1880a–c, 1884, stizenberger 1890,
1891, sickenberger 1901, steiner 1893, 1916, werner 1966,
galun & garty 1972, temina
et al.
2004, 2005, seaward &
sipman 2006). egyptian investigators have participated in a
few studies
of lichens, namely in north sinai (Khalil 1995)
and on trees (Koriem 2003), and there have also been some
physiological studies on the bionts (Koriem 2006). Khalil
(1995) recorded 43 species belonging to 18 genera, all of
which are ascolichens without any basidiolichens at all, and
only one of these had a perithecioid ascoma (
seaward & sipman (2006) reported 157 taxa of
lichenized fungi (149 species and 8 infraspecific taxa) and
six lichenicolous fungi (fungi obligately growing on lichens).
Foliose lichens are very scarce, only being represented by the
Xanthoria
(7 species) and
(1 species). the
fruticose growth form is better represented, with members of
the genera
and
at the family level,
accommodated the most
taxa (39), followed by
roccellaceae
(16), and
(12). For more information concerning egyptian lichens
please see:
check-lists of lichens and lichenicolous
Fungi (
galun & garty (1972), Khalil (1995), Koriem (2003, 2006),
constitute by far the largest group
of fungi so far known, accommodating a relatively large
assemblage of taxa estimated to be 65 % of all described
fungi (Kirk
et al.
2008) occurring in various habitats; aquatic
or terrestrial, under moderate or stress conditions (Kodsueb
et al.
2008a, b, Kruys & ericson 2008, thongkantha
2008). a large number of
species are
economically important (e.g.
spp., Kvas
et al.
spp., damm
et al.
2009, hyde
et al.
spp., crous 2009), while few are
edible (morels and trufes), and some are used also in
the production of food (including bread), drinks, organic
acids, mycofungicides, fungal biofertilizers, cosmetics and
this phylum encompasses biologically diverse forms.
many are free-living saprobes including species which may
be cellulose decomposers, chitinolytic, keratinolytic, or
mycology in egypt
coprophilous, others are parasitic forms including species
which cause very serious plant diseases like powdery-mildew,
wood-canker, ergot, rot, blight, scab, leaf curl, and leaf-spots
(e.g. alves
et al.
2008, aveskamp
et al.
2008, simonis
et al.
2008, wulandari
et al.
2009). others that are considered
symbiotic forms contain species which live in association with
characteristically, when reproducing sexually,
produce non-motile spores (ascospores) in a distinctive
“ascus”. however, some members of the
do
not reproduce sexually and do not form asci or ascospores
). these asexual members are
assigned to
based upon morphological and/
or physiological similarities to ascus-bearing taxa, and in
particular by phylogenetic comparisons of dna sequences.
In old classication systems these were often placed in
a separate articial phylum, the deuteromycota (or “fungi
imperfecti”). molecular analyses can now place these genera
and species among ascus-bearing taxa, or more rarely in
the rst reports of mutualistic non-lichenized ascus-
forming fungi from egypt were those of
terfezia
tirmania,
by reichert (1921), and then melchers (1931)
who recorded six species. later, sabet (1935) recorded some
chaetomium
species. the saprobic
did not receive attention, and therefore information remained
limited until the early 1970s, when some research on the group
was initiated by moubasher and his co-workers during their
studies on soil fungi. since then, fragmentary information has
been accumulating, but these fungi had never been the main
objective of any egyptian study focusing on their ecology,
distribution, and substrate preferences, untill the study of
three hundred and three species of teleomorphic
(including ascosporic yeasts) have
been recorded from all terricolous substrates of egypt
(moustafa & abdel-azeem 2010, and unpubl.). In their
studies, 10 species of edible
were recorded from
egypt within the genera
morchella, terfezia,
tirmania
. In
total, 328 taxa were recorded in this survey, of which only
32 species are ascosporic yeasts. Binyamini (1973) reported
Peziza vesiculosa
as a coprophilous fungus from occupied
Palestine, and some samples were even collected from north
sinai during the occupation in 1967, but never cited as an
egyptian record in any checklist. In addition,
was recorded for the rst time in egypt by el-
saadawi & shabbara (1999) as an association between a
For more details see sabet (1936, 1939a), Binyamini
(1973), el-saadawi & shabbara (1999), abdel-hafez
et al.
(1995), Ibrahim (1995), el-abyad (1997), zaki
et al.
(2005),
moustafa & abdel-azeem (2005a, b, 2006, 2008, 2010), and
records of phytopathogenic fungi in egypt were scattered
through the literature until 1921, when Israel reichert (Fig.
2) carried out his pioneer study of egyptian fungi. this was
followed by a comprehensive checklist of plant diseases
and fungi occurring in egypt by melchers (1931). records
concerning aspects of plant pathology in egypt continued to
be accumulated during many decades until el-helaly
et al.
(1963, 1966) started to update the information, and another
updated bibliography of agricultural studies conducted
in egypt between the period 1900 to 1970 appeared
et al.
1972). this revealed records of 82 species
of teleomorphic plant pathogenic
. For more
details please check, natrass (1933), abou el-seood (1968),
ghoniem (1985), el-desouky & el-wakil (2003), Phillips
et al.
anamorphic genera are gradually disappearing into the
overall ascomycete system, though it will take many years
a school of medical mycology in egypt was formed at the
beginning of 1967, when the late youssef a. youssef (ain
shams university, Faculty of science; Fig. 2) published two
papers on fungus infection of the human ear. youssef and
his students and colleagues became interested in medical
mycology, serology and fungi affecting human health. For
more details see youssef & abdou (1967a, b), hassan
et al.
(1980a–e, 1981), youssef & Karam el-din (1988a, b), Karam
et al.
(1994 a–c, 1995, 1996), and youssef
et al.
(1989,
In 1979 Ismail abdel-razak m. el-Kady received credit
as the egyptian mycologist working on mycotoxin producing
fungi in egypt. el-Kady and his coworkers studied the majority
of aspects related to toxinogenic fungi, e.g. factors affecting
mycotoxin production, toxinogenic taxa in food and feed, and
mutagenic effects of fungal toxins. For more details see el-
Kady & moubasher (1982 a, b), and el-Kady
et al.
In 1987, mamdouh s. haridy (minia university, Faculty of
science) became the pioneer egyptian mycologist in yeast
identication and taxonomy, having completed his Phd thesis
on the taxonomy of yeasts (“taxonomie milchwirtschaftlich
wichtiger hefen”, technical university, munich). he conducted
a series of extensive studies on the egyptian saprobic yeasts
from different ecological habitats and sources (haridy 1992a,
recently, other areas of egyptian mycology have
been established, such as on the identication of human
plant pathogens
by molecular techniques. youssuf a.
(Botany department, Faculty of science, south
valley university) focused on the identication of plant
pathogens and saprobic fungi of food by means of molecular
techniques (gherbawy 2004, gherbawy & abdelzaher 2002,
gherbawy & Farghaly 2002, gherbawy & voigt 2010),
and sherif m.
(microbiology department, Faculty of
shams university) extended the research
of youssef a.
youssef
using the molecular techniques in
species identication of human pathogens (zaki
et al.
2005,
about 905
filamentous or yeast-like anamorphic fungi
have been reported from egypt. these taxa colonize, survive
and multiply in air, litter, soil, plant surfaces, the human
body and other substrates. of these, only 28 are species
ahmed m. abdel-azeem
of anamorphic ascomycetous yeasts, which belong to three
genera. Furthermore, five genera of basidiomycetous yeasts
For more information consult al-doory (1968), abdel-
Fattah (1985), sherief (1985), Bagy & abdel-hafez (1985),
Khater (1989), shalouf (1989), shindia (1990), abdel-mallek
et al.
(1995), abdul wahid
et al.
(1996), hamdi & hassanein
(1996), el-tanash (1997), shalaby (1999), mahmoud (1999),
Ismail & sabreen (2001), teramoto
et al.
(2001), abdel-
wahab (2002), Farghaly
et al.
(2004), nofal & haggag (2006),
et al.
(2007), abdel-hamed (2008), and Kottb (2008).
marine fungi form an ecological, and not a taxonomic group
(raghukumar 2008, Jones
et al.
2009, hyde
et al.
2000).
among these, the obligate marine fungi grow and sporulate
exclusively in seawater, and their spores are capable of
germinating in seawater (hyde
et al.
1998). on the other hand,
facultative marine fungi are those obtained from freshwater
or a terrestrial
, and have undergone physiological
adaptations that allow them to grow and possibly also sporulate
in the marine environment (Kohlmeyer & Kohlmeyer 1979).
these fungi belong mostly to ascomycetes, their anamorphs,
and a few basidiomycetes. among the straminipilan fungi,
those belonging to
labyrinthulomycetes
, comprising the
thraustochytrids, aplanochytrids, and labyrinthulids are
obligate marine fungi (raghukumar 2002), and those
belonging to the oomycetes are also fairly widespread in the
about 3000 fungi (exclusive of yeasts) have been reported
from aquatic habitats of which
(1 527 spp.) and
anamorphic taxa (785 spp.) are the most diverse groups,
followed by
(576 spp.) with
(21 spp.) as the least diverse group (vijaykrishna
et al.
2006,
anwar abdel aleem
(Faculty of science, university of
alexandria), or
Peripatetic aleem as he was known among his
colleagues, is one of the most brilliant arab marine botanists
and oceanographer extraordinaire. he is considered one of
the pioneer marine egyptian mycologists, with studies on
marine fungi dating back to 1950 (aleem 1950a–c, 1952a–c,
1953, 1962, 1974, 1975, 1978, 1980a, b, aleem & mailbari
In egypt, obligate and facultative marine fungi are
considered as forgotten fungi (Jones 2001) because they
never featured in research topics until 1993, which is
considered the starting point of marine mycology research
in egypt. this provided mohamed abdel-wahab (Botany
department, Faculty of science, south valley university,
sohag, egypt) the possibility to publish his pioneering study
on the egyptian obligate mangrove-inhabiting fungi of the
red sea in 1996. three contributions of el-sharouny
et al.
(1998, 1999) and abd-elaah (1998) shed light on the ecology
and taxonomy of mangrovicolous, algicolous and aquatic
fungi of the red sea in upper egypt. abdel-wahab (2000)
obtained his Phd on the biodiversity of fungi in subtropical
mangroves; he recorded 25 fungi on intertidal wood of
avicennia marina
collected from three mangrove stands of
the red sea coast of egypt. abdel-wahab
et al.
(2001a,
b) published three new species,
halosarpheia unicellularis
swampomyces aegyptiacus
s. clavatispora,
from red
sea mangroves. Pang
et al.
(2002) erected
as a
new lignicolous freshwater ascomycete order with the new
Patescospora separans
from egypt. abdel-raheem
(2004) studied the effect of different techniques on diversity
of freshwater hyphomycetes in the river nile (upper egypt).
abdel-wahab (2005) examined the diversity of marine fungi
on intertidal decayed wood of
a. marina
and on decayed
prop roots of
rhizophora mucronata
in mangrove stands in
the southern part of the egyptian red sea coast; 39 species
were identified on decayed wood of
a. marina,
of which 19
were new records for egypt and the red sea. Freshwater
fungi are those relying on freshwater for at least part of their
life-cycle (wong
et al.
1998, raja
et al.
2009). abdel-aziz
(2008) studied the diversity of aquatic fungi in lake manzala,
which was the first report of aquatic fungi from the lake. sixty
taxa including 26 ascomycetes and 34 anamorphic fungi
were recorded,
of which 19 species were new records for
egypt. el-sharouny
et al.
(2009) studied the fungal diversity in
brackish and saline lakes in egypt; 97 fungi (40 ascomycetes,
55 anamorphic fungi and 2 basidiomycetes) were identified
from 764 collections, obtained from 545 samples, of which 70
the revision of all available data sources reveals that the
total number of marine and aquatic fungi known in egypt is
207 taxa (87
, 117 anamorphic taxa, and 3
). there is no checklist of aquatic egyptian fungi so
far. For more details on these fungi see the website (
), search mangrove fungi (
), and check relevant studies
(Khallil 2001, abdel-aziz 2004, abdel-wahab
et al.
2009,
the taxonomy of the entomopathogenic fungi has received
much attention since the 1970s. more than 700 species of
fungi are associated with insects, spiders, and mites (samson
et al.
1988, hajek & st. leger 1994, sung
et al.
2007, aung
the invertebrate pathogenic fungi can be classied
in the
, and
allied anamorphic fungi; no truly entomopathogenic
basidiomycetes have been documented (samson
et al.
1988). entomopathogenic fungi range from commensals
or mutualists, through ectoparasites which do not seriously
affect their hosts, to pathogens which are lethal and include
representatives of all the groups of fungi (hawksworth
et al.
Few records appeared reporting the occurrence of
entomogenous fungi in egypt until natrass (1932) published
preliminary notes on some of these fungi in egypt. he
recorded ve species:
empusa grylli
(
aspergillus avus
mucor racemosum,
metarhizium anisopliae
. In the beginning of the 1960s,
mycology in egypt
egypt started to apply biocontrol methods to insects by
entomopathogenic fungi, and gad
et al.
(1967) studied the
there are several studies on this ecological group of fungi
in egypt, such as Badran & aly (1995), shoulkamy
et al.
(1997),
shoulkamy & lucarotti (1998), hafez
et al.
(1997), sewify
(1997), abdel-Baky (2000), sewify
com/journal/119022140/abstract?cretry 1&sretry 0
- fn1#fn1&>
hashem (2001), abdel-sater &
eraky (2002),
ali (2003),
<3.interscience.wiley.com/journal/119022140/
abstract?cretry 1&sretry 0 - fn1#fn1>
abdel-mallek
et al.
(2003 a, b), el-hady (2004), mourad
et al.
(2005),
abdel-mallek & abdel-rahman (2006), el-maraghy
et al.
(2006), and moubasher
et al.
(2010). as a result of these
only 18
species belonging to 13 genera were recorded as
entomopathogenic fungi of egypt. For more details please
In egypt, the study of nematophagous fungi dated back to
1963 when hamdy
(
department of Plant Pathology,
nematology laboratory, national research centre, dokki,
cairo) isolated and illustrated four species belonging to two
genera. various studies on the biocontrol of nematodes by
fungi have been the target of many studies in egypt; the most
relevant are: ali (1994, 1995), ali & Barakat (1994), aboul-eid
et al.
(1997a, b, 2006), ashour & moustafa (1999), and amin
& moustafa (2000). out of these various data and information
only 10
species belonging to seven
genera were recorded as
the
Basidiomycota
contains about 31 503 described species,
which represents 31.8 % of the known species of true
Fungi
(Kirk
et al.
2008). this group includes mushrooms, puffballs,
bracket fungi and some yeasts (Petersen
et al.
2008,
wannathes
et al.
2009). many
Basidiomycota
decay dead
organic matter, including wood and leaf litter symbiotic lifestyles
(intimate mutually benecial or harmful associations with other
living organisms) are well developed in the
Basidiomycota
. they
include major plant pathogens, such as “rusts” (
uredinales
) and
“smuts” (
ustilaginales
), which attack wheat and other crops,
and some human and animal pathogens. not all symbiotic
Basidiomycota
cause harm to their partners. Indeed, some form
ectomycorrhizas with the roots of plants, principally forest trees
such as oaks, pines, dipterocarps, and eucalypts (smith & read
1997, rinaldi
et al.
2008). other symbiotic
Basidiomycota
form
associations with insects, including leaf-cutter ants, termites,
scale insects, wood wasps, and bark beetles (wheeler &
Blackwell 1984, mueller
et al.
1998).
the rst information on hyphenate macro-basidiomycota
(phytopathogenic or saprobic) in egypt dates back to delile
(1813a), melchers (1931), and morse (1933). In her study on
the genus
, morse referred to some samples collected
from egypt. after six decades more information about macro-
basidiomycota came to light through a series of studies
carried out by several investigators, such as mouchacca
(1977), zakhary (1979), salem & michail (1980), zakhary
(1983), malenÇon (1984), assawah (1991), chen (1999),
abu el-souod
et al.
(2000), el-Fallal (2003), el-Fallal & Khedr
(n. dat.), el-Fallal & el-diasty (2006), Kim
et al.
(2006), and
an exhaustive revision of all the available literature and
sources mentioned since 1931 shows that 108 taxa belonging
to 65 genera, 104 species, and 4 varieties of egyptian macro-
though many basidiomycetes are saprobes or wood-rotters,
Basidiomycota
contains two common and destructive
groups of plant pathogens: rusts and smuts. rust fungi
are the largest group of fungal plant pathogens, containing
7 000 species that possess the most complex life-cycles in
the kingdom fungi (sert 2009). they are obligate biotrophs
and cause disease on most crops, ornamentals, and many
other plants (hawksworth
et al.
1995). In addition to basidia
and basidiospores, rusts produce other types of spores such
as teliospores spermatia, aeciospores, and uredospores.
rusts that produce all ve types of spores are referred to as
macrocyclic, while rusts that lack one or more spore type are
referred to as microcyclic. unlike rusts, smuts produce only
basidiospores and teliospores which can survive in the soil
away from a host plant. smuts commonly infect the ovaries
of grains and are easily recognized by the formation of galls
the initial research and documentation of rust and smut
diseases in egypt was by reichert (1921), Briton-Jones
(1922), Philp & selim (1941), abdel-hak & abdel-rehim
(1950), ragab & mahdi (1966), and assawah (1969). later,
in-depth research was carried out by egyptian and other
investigators, with different targets such as taxonomy,
pathogenicity, biocontrol and serology. the most relevant
studies are: sherif
et al.
(1991), el-shamy (1996), Baka &
gjaerum (1996), mennicken
et al.
(2005), abd el Fattah
et al.
(2009), abd el-ghany (2009) and
et al.
Baka
& gjaerum (1996) gave the rst serious modern taxonomic
treatment of local rusts, reporting 23 rust species on various
monocotyledonous and dicotyledonous plants in the nile
valley (see mouchacca 2003b). as a result of these studies,
112 species of plant pathogenic
belonging to
total recorded species
after the omission of duplicate names, name correction,
allowance for synonyms and taxonomic assignments of all
reported taxa from egypt, the number of the egyptian fungi
recorded is 2 281 taxa belonging to 755 genera (table 1).
at the generic level, some genera exhibit an extraordinary
high species richness such as
(100 spp.) and
(83). other genera show moderate richness such
chaetomium
(53 spp.),
(49),
(41),
ahmed m. abdel-azeem
It is generally accepted that only about 7 % of all fungi
have so far been discovered, and about 93 % still wait to
be discovered. Fungi are neglected organisms and they
are not well protected, but like animals and plants, they
are endangered by human activities. although the 1992
convention on Biological diversity extends protection to
all groups of organisms, it is worded in terms of “animals,
plants and microorganisms” and fungi do not t well into
these categories. In egypt and up to now fungal biodiversity
and conservation topics have been overlooked. as a
result, countries which signed the convention have almost
universally overlooked fungi in preparing their biodiversity
conservation plans: fungi are truly the orphans of rio (minter
threats to fungi throughout the globe are of concern
since they are not only beautiful but also play a signicant
role in human welfare. three steps were suggested by moore
et al.
(2001) for fungal conservation: (1) conservation of
habitats; (2)
in situ
conservation of non-mycological reserves/
ecological niches; and (3)
ex situ
conservation especially for
saprobic species growing in culture. to help collections of
fungal cultures to maintain appropriate standards, the world
Federation for culture collections (wFcc) has formulated
guidelines which outline the necessary requirements
(hawksworth 1991, smith
et al.
2001, smith 2003). there are
573 microbial culture collections in 68 countries registered
in the world directory of collections of microorganisms
(dcm) (
). In egypt only two
centers are recorded: emcc (wdcm583) egypt microbial
culture collection, cairo microbiological resources centre
(cairo mIrcen), ain shams university, and nodcar
wdcm822 marwa mokhtar abd rabo, national organization
of drug control and research. however, moubasher and his
colleagues founded the assiut university mycological centre
(aumc) in 1999 where more than 6 000 fungal isolates
belonging to more than 500 species are being preserved
under low temperature (5 °c), deep-freezed (-80 °c), and
lyophilized; this is the biggest reference culture collection in
the arab countries. the centre also has a collection of dried
specimens (i.e. a fungarium) which is rare in arab countries.
In spite of this the aumc is not yet registered with the wFcc.
the number of habitats that potentially support
specialized fungi is enormous. the fungi described as new to
science during 1981 to 1990 were associated with 1 982 host
genera or substrata (hawksworth & rossman 1997). some
unexplored substrata and habitats from which these fungi
were found include the rumens of herbivorous mammals,
algae, lichens, mosses, marine plants, including mangroves
the egyptian fungi are presently represented by 2 281
taxa (1 035 species and 395 genera) out of the 101 202
world estimate. In comparing the fungal diversity recorded
in egypt with other countries, it is important to mention that
some ecological groups of fungi are completely ignored or
have never been studied in a comprehensive way in egypt,
such as
trichomycetes
(a group of enigmatic fungi occurring
in the hindguts of insects and other invertebrates; lichtwardt
2002), in addition to hypersaline and black yeasts. other
groups needing more exploration such as algicolous fungi,
invertebrate associated fungi, mycorrhizas, endophytic fungi,
lichens, wood deteriorating, and coprophilous fungi. the
potential fungal resources of egypt are globally important
and there are vast areas that are still unexplored. at present,
egypt needs more investigators and funds to explore and
develop this research eld and, therefore, the extensive
collection of fungi in unexplored areas remains a priority.
this review will be followed by an updated checklist of
all recorded egyptian fungi up to the present, a bibliographic
study of egyptian mycological research, and a book on the
fungi of egypt, supplemented with provisional keys to all
table 1.
numbers of recorded egyptian fungi.
roups and Phyla
el-abyad (1997)
Present survey
25
25
40
21
32
17
35
teleomorphic genera
80
251
181
261
32
87
total no. of genera recorded in egypt
360
755
total no. of species recorded in egypt
1246
2281
mycology in egypt
all my thanks to the late samy m el-abyad (Botany department,
Faculty of science, cairo university) for his courage in documenting
the egyptian fungi in 1997. I express my appreciation to Paul m Kirk
(caBI europe, uK) for data on species names in the
Index Fungorum
database; the late John c Krug (centre for Biodiversity and
conservation Biology, royal ontario museum, toronto) for providing
some unavailable papers. I am further indebted to Jean mouchacca
(laboratoire de cryptogamie, muséum national d’histoire naturelle,
Paris), yaacov Katan (department of Plant Pathology and
microbiology, Faculty of agriculture, Food and environmental quality
sciences, the hebrew university of Jerusalem, Israel) and hussien
m rashad (ashtoum el-gamil Protectorate, Port said, egypt) for
their unfailing help during this work. I also owe thanks to robert a
(Forest Pathology and wood microbiology research
laboratory, minnesota university) and el-sayeda m gaml el-din
(Botany department, Faculty of science, suez canal university) for
critical reading the manuscript. I also thank Pedro w crous (cBs-
Knaw Fungal Biodiversity centre, utrecht) who worked closely with
me in preparing and editing the manuscript and photoplates, and the
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4 years this committee
was unable to reach consensus upon changes. some
mycologists have decided to ignore existing rules or to take
nomenclatural risks. genetic sequence phylogenetic analyses
have revealed many new relationships leading to binomial
recombinations and even a Phylocode. having reached an
impasse it can be asked if mycologists wish to eliminate dual
nomenclature? If the answer is yes, it may be asked how to
resolve conflicts, and then to create a process or body capable
of dealing with such conflicts.
(gams): this presentation was submitted without a formal
abstract and too late to be included in the printed program.
gams discussed the effects of ‘teleotypification,’ which
permits — after a teleomorph discovered for a fungus
previously known only as an anamorph (and for which
there is no existing legitimate name for the holomorph) —
designation of an epitype exhibiting the teleomorph stage for
the hitherto anamorphic name, even when there is no hint
of the teleomorph in the protologue of that name. several
examples were forwarded to show that teleotypification is not
the same as ordinary epitypification. For further information,
norvell
et al
From august 1–10, Imc9 delegates returned questionnaires
in which they were to circle a y (yes) or n (no) to 24 questions
on 4 topics. we discovered during our first tabulation that one
number (#19) appeared twice, bringing the actual number
of questions to 25, and have renumbered the text below
accordingly. of the 174 questionnaires received, 7 were
declared ‘spoiled’ as the respondents had placed an X over
an option so that we could not determine whether agreement
or rejection was intended. Both raw numbers and majority
percentages are shown. we note that protocols followed at the
2005 International Botanical congress in vienna with respect
to the preliminary mail-in ballots decreed that proposals
receiving 60 % or higher support merited further discussion
by the attending nomenclature section, while 75 % support
virtually ensured passage for all but the most controversial
proposals. In the results reported below, opinions showing
one code for the future nomenclature of all organism names would be ideal
..............................................................................................................................................................
Fungi should continue to be covered under the Botanical code (IcBn)
...............................................................................................................................................................
Fungi should continue to be covered under the IcBn provided it is renamed the “Botanical and mycological code”
..............................................................................................................................................................
Fungi should be covered by a separate mycological code (Icmn)
...............................................................................................................................................................
under either IcBn or Icmn, decisions on fungal nomenclature should be voted at an International mycological
congress (and not an International Botanical congress), guided by a secure advanced web publication and
............................................................................................................................................................
latin diagnoses/descriptions should continue to be required
...............................................................................................................................................................
english diagnoses/descriptions rather than latin should be required
.............................................................................................................................................................
either latin or english diagnoses/descriptions should be required
..............................................................................................................................................................
diagnoses/descriptions in any language should be permitted
...............................................................................................................................................................
deposition of key nomenclatural information in one or more approved depositories (e.g. mycoBank) should be made
mandatory for the valid publication of new fungal names
............................................................................................................................................................
11
historic names not included in
t date) should no longer be treated as validly published
...............................................................................................................................................................
deposited names should be automatically protected against any unlisted names after a date to be agreed
..............................................................................................................................................................
an accurate and free list should be prepared of names in use or available for use
............................................................................................................................................................
names with key information deposited (e.g. in mycoBank) should be automatically available provided other code
............................................................................................................................................................
electronic on-line only publication should be accepted without restriction
.............................................................................................................................................................
electronic on-line only publication should be accepted only when key nomenclatural information has been deposited
y-113 n-36
............................................................................................................................................................
Im
9 edinburgh nomenclature
essions
For journals publishing online and printed copies, the dates of names should be those when the works are available in
............................................................................................................................................................
For journals publishing online and printed copies, the dates of names should be those when the works are distributed
...............................................................................................................................................................
special group committees should be empowered to create lists of acceptable and rejected names in particular groups
Fusarium, trichocomaceae
............................................................................................................................................................
the established system allowing dual nomenclature for anamorphs and teleomorphs should continue via art. 59
...............................................................................................................................................................
article 59 should revert back to its status prior to changes in the 2006 vienna code, i.e. keeping separate anamorph
...............................................................................................................................................................
a system of progressively establishing one name for each fungus should be enacted via modification of existing
articles (e.g. art. 59)
............................................................................................................................................................
the historical practice of allowing valid names for different morphs of a species should be prohibited in the future via
modification of existing articles
..............................................................................................................................................................
the ability to select a “teleotype” (a type of epitypification) with a sexual state for a fungus previously only known in
the asexual state should be continued
..............................................................................................................................................................
article 59 (that permits the dual system) should be deleted provided other changes ensure this would not retroactively
..............................................................................................................................................................
we thank John mcneill (royal Botanic garden edinburgh) for his
perennially wise counsel and cheerful guidance. we further thank
special presenters vincent demoulin, Paul Kirk, and walter gams;
José dianese (Brazil) for assisting in tabulating questionnaire results
on 3 august; and all those who participated in the nomenclatural
demoulin v (2010) Proposals to amend articles 15, 36, and 45.
taxon
gams w, Jaklitsch wm, Kirschner r, réblová m (2010) three
proposals to amend article 59 of the
concerning
taxon
greuter w, hawksworth dl, mcneill J, mayo ma, minelli a, sneath
Pha, tindall BJ, trehane P, tubbs P (eds) (1998) draft Biocode
(1997): the prospective international rules for the scientific
taxon
hawksworth dl, crous Pw, dianese Jc, gryzenhout m, norvell
ll, seifert Ka (2009) Proposals to amend the
to make it
clear that it covers the nomenclature of fungi, and to modify the
governance with respect to names of organisms treated as fungi.
taxon
hawksworth dl, cooper Ja, crous Pw, hyde Kd, Iturriaga t, Kirk Pm,
lumbsch ht, may tw, minter dw, misra JK, norvell l, redhead
sa, rossman ay, seifert Ka, stalpers Ja, taylor Jw, wingfield
mJ (2010) Proposals to make the pre-publication deposit of
key nomenclatural information in a recognized repository a
requirement for valid publication of organisms treated as fungi
taxon
111
mcneill J, Barrie Fr, Burdet hm, demoulin v, hawksworth dl,
marhold K, nicolson dh, Prado J, silva Pc, skog Je, wiersema
Jh, turland nJ (eds) (2006)
International code of Botanical
nomenclature (vienna code) adopted by the seventeenth
International Botanical congress vienna, austria, July 2005
[regnum vegetabile no. 146.] ruggell: a.r.g. ganter verlag.
nakada t (2010) a proposal on the designation of cultures of fungi
taxon
redhead sa, Kirk Pm, Keeling PJ, weiss lm (2009) Proposals to
exclude the phylum
from the
taxon
[reproduced with minor amendments from
113
: 503–511
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species of
are some of the most important
pathogens of woody plants in the world. these fungi have
been known as tree pathogens since their first discovery by
danish botanist martin vahl. while the taxonomy of these
spp. has been controversial and widely debated
over an extended period of time, application of the biological
species concept (Korhonen 1978, anderson & ullrich 1979,
et al.
1998, qin
et al.
2007) and more recently dna
sequence comparisons (coetzee
et al.
2000a, 2003a, 2005,
et al.
2004, Keča
et al.
2006, mwenje
et al.
2006,
et al.
2010) have resolved many problems relating
to the delineation of species. at least 40 species are now
recognised in
(volk & Burdsall 1995, lima
et al.
2008, Pildain
et al.
2010) and it is likely that other species will
armillaria root rot, the disease caused by pathogenic
spp. can result in serious losses to productivity in
tree plantations, fruit tree orchards and in gardens (gregory
et al.
1991, hood
et al.
1991). In native forests,
spp. cause disease but this is most typically a natural process
et al.
1991). Interestingly, species of these fungi exist as
clones covering huge areas of land and in these situations
they are considered to be amongst the largest and oldest
only a single native
sp. occurs in south
africa (coetzee
et al.
2000a). this fungus,
a. fuscipes
is
occasionally found on native trees (Kotzé 1935, referred
to as
a. mellea
). In contrast, it can be a serious pathogen
in plantations of non-native
spp. and on fruit trees
planted in moist areas that have been cleared of native
forest (lundquist 1986, 1987, coetzee
et al.
2000a). a more
sp. in south africa is
a. mellea
that was
discovered in the company (dutch east India company)
gardens in the centre of cape town (coetzee
et al.
2001).
the fungus in that situation represents a single genetic entity
that was shown to be at least 358 years old. It was most
likely introduced into the city when gardens were established
to provide sailors travelling to the east with fresh produce
some years after the discovery of the
a. mellea
clone in
cape town, armillaria root rot was found killing
plants
in the historic Kirstenbosch Botanical gardens (
) on the foothills of south africa’s iconic table mountain
et al.
2003b). the fungus in that situation was never
seen fruiting but isolates were identified as those of
a. gallica
and it was suggested that the fungus was introduced into the
gardens with plants brought from asia (coetzee
et al.
2003b).
a few of the isolates collected on the
plants were also
thought to represent
a. mellea
, but the identification was
tentative and based only on rFlP comparisons, without
comparison of dna sequence data against other
during may 2010, sporocarps of what appeared to be an
sp. were found in large clumps in the upper corner
, martin P.a. coetzee
, Pedro w. crous
department of genetics, Forestry and agricultural Biotechnology Institute (FaBI), university of Pretoria, Pretoria, 0002, south africa;
corresponding author e-mail: mike.wingeld@fabi.up.ac.za
cBs-Knaw Fungal Biodiversity centre, uppsalalaan 8, 3584 ct utrecht, the netherlands
department of ecosystem and conservation sciences, college of Forestry and conservation, university of montana, missoula, mt 59812, usa
abstract:
during may 2010, sporocarps of what appeared to be an
armillaria
sp. were found in large clumps in historic
Kirstenbosch Botanical gardens on the foot of table mountain, cape town, south africa. these sporocarps could be
physically linked to the roots of unidentied dead trees and
Protea
spp. the aim of this study was to identify the
armillaria
sp. found fruiting in Kirstenbosch. to achieve this goal isolates were made from the mycelium under the bark of dead roots
linked to sporocarps. the Its and Igs-1 regions were sequenced and compared to sequences of
armillaria
spp. available
on genBank. cladograms were generated using Its sequences to determine the phylogenetic relationship of the isolates
with other
armillaria
spp. sequence comparisons and phylogenetic analyses showed that the isolates represented
a.
mellea
. they were also identical to isolates of this species previously discovered in the company gardens in south africa
and introduced from europe apparently by the early dutch settlers.
armillaria mellea
is alien and apparently invasive in
cape town, fruits profusely and has the potential to spread to sensitive native forests on the foothills of the city.
article info:
submitted: 30 october 2010; accepted: 4 november 2010; Published: 15 november 2010.
Key words:
Ima Fu
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ingeld
et al
of Kirstenbosch Botanical gardens and close to rycroft’s
gate. these sporocarps could be physically linked to the
roots of unidentified dead trees and
spp. (Fig. 1B,
c). upon removal of the bark from the dead roots, sheets
of white mycelium typical of armillaria root rot were found.
the aim of this study was to identify the
sp. found
fruiting in Kirstenbosch using data that were not available at
the time of the discovery of armillaria root rot in cape town
mate
an
Isolation and purification of isolates followed the methods
outlined in coetzee
et al
. (2003). cultures were maintained
on malt extract yeast agar (mya) (15 g/l malt extract, 2
g/l yeast extract, 15 g/l agar). cultures are stored in the
culture collection (cmw) of the Forestry and agricultural
Biotechnology Institute (FaBI), university of Pretoria and with
the centraalbureau voor schimmelcultures (cBs), utrecht,
Fig. 1.
armillaria root rot in Kirstenbosch Botanical gardens.
native woody shrubs and forest deeper in the valleys common on the cape
clusters of fruiting bodies found on a stump.
robust fruiting bodies of
sp. showing a yellow cap, prominent
Fungal phoenix
Isolates for dna extractions were grown at 25 °c in the dark for
3 wk in conical flasks containing liquid malt extract yeast (my).
mycelium was harvested using a tea strainer, freeze-dried and
lyophilised. dna extractions followed the protocol of coetzee
et al.
(2000b). a nanodrop spectrophotometer (thermo Fisher
scientific, usa) was used to quantify the dna. the Igs-1 and
Its regions of the rdna operon were amplified using primer
pairs P-1 / o-1 and Its-1 / Its-4, respectively. Pcr reaction
mixture and conditions were the same as those published
by coetzee
et al.
(2000b), except that Faststart tag dna
polymerase was used instead of an expand high Fidelity Pcr
system. the Pcr products were purified prior to sequencing
using a msB® spin Pcrapace kit (Invitek, germany). dna
sequences for the Igs-1 and Its-1 regions were obtained
in both directions using the same primers employed for their
amplification. the sequence reactions were carried out using
an aBI PrIsm dye terminator cycle sequencing ready kit
with amplitaq dna Polymerases Fs (applied Biosystems)
following the manufacturer’s instructions. chromatographs
were analysed and contigs assembled in clc main workbench
v. 5.7 (clc bio, denmark).
na sequence comparisons and phylogenetic
dna sequences were compared against those available in
the ncBI genBank database using a Blastn search. Igs-1
and Its sequences generated in this study were aligned
against those of isolates cmw 3975 and cmw 3978 available
on genBank and originating from the company gardens in
cape town. this was done to determine nucleotide variation
between the isolates from the company gardens and those
Phylogenetic analysis was conducted with a sub-set of
the Its-1 dataset generated by coetzee
et al
. (2003). the
dataset was amended with dna sequences for
a. fuscipes
from south africa and
a. mellea
from europe, asia, western
usa, eastern usa and the company gardens, south africa.
sequences were re-aligned using maFFt v. 6 (Katoh & toh
2008). cladograms were generated using a heuristic tree
search algorithm in PauP v. 4 with branch swapping set
to tBr and random addition of sequences (10 replicates).
trees were rooted to
a. fuscipes
. Bootstrap analysis (1000
replicates) was done to gain support for the grouping of
taxa using the same settings as above but with addition of
the macro-morphology of basidiocarps produced by the
fungus was similar to that described for
a. mellea
(watling
et
1982) (Fig. 1d–g). the cap colour of the basidiocarps was
distinctly yellow and they had thick annuli and stipes tapering
towards the base. the basidiocarps also had a caespitose
two isolates (cmw 36264 and cmw 36265) were
retrieved from infected roots and these produced rhizomorphs
typical of
armillaria
spp. in culture (Fig. 1h). the rhizomorphs
displayed a dichotomous growth habit and were produced
in abundance. white aerial mycelium was observed on the
surface of the rhizomorphs at areas that had grown out of
na sequence comparisons and phylogenetic
the Igs-1 and Its dna sequences of isolates from
Kirstenbosch were most similar to sequences of
a. mellea
in genBank. comparisons of Igs-1 and Its sequences
revealed the absence of nucleotide variation between
isolates from Kirstenbosch and
a. mellea
from the company
the Its dataset included 925 characters of which 183
characters were parsimoniously informative. a heuristic
search generated 6 trees with tree lengths of 250 steps (Fig.
2). the consistency index was 0.864, and retention index
0.941. the isolates from Kirstenbosch formed a monophyletic
group with
a. mellea
from the company gardens with strong
bootstrap support and together these were placed in a clade
that included sequences of
a. mellea
from europe (99 %
sporocarps linked to infected roots from which cultures were
made in this study were morphologically similar to those of
previously found in the cape town city centre. dna
sequence comparisons also showed that the cultures were
those of
a. mellea
and the sequences were identical to those
from the company gardens. although vegetative compatibility
tests were not done to test whether these represent the same
clone as those in the city centre, there was no Igs-1 or Its
nucleotide variation between isolates from the two locations
there are three possible means of introduction of
into Kirstenbosch Botanical gardens, via air-dispersed
basidiospores, on infected plant material or on infested wood
armillaria mellea
in the company gardens fruits
profusely every year at the onset of the first rains in autumn.
although the fungus clone is entirely surrounded by roads
and buildings, the basidospore cloud is likely to easily spread
within the city and at least up the foothills of table mountain,
on which Kirstenbosch is situated. while
a. mellea
might
have been introduced into Kirstenbosch separately to that of
the clone found in the company gardens and as
a. gallica
must have been, it would perhaps more easily have spread to
this nearby location via basidiospores. one further possible
route of introduction to consider relates to the cultivation
practices used in the garden. Flowerbeds and paths are
frequently covered with wood and bark mulch. as
armillaria
spp. are common wood rotting fungi, it is possible that
a. mellea
was introduced into the gardens through this substrate.
ingeld
et al
sporocarps have not previously been found in
Kirstenbosch. this may simply be related to the fact that they
are ephemeral and have not been present when mycologists
or plant pathologists might have been visiting the botanical
garden. when these sporocarps were discovered, they were
relatively widespread and all were morphologically similar.
the infected roots from which isolates were made were
also from a number of locations, none of which had been
associated with the infection by
a. gallica
. It is possible that
a. gallica
also fruits in the garden, but at a different time to
or it is less prone to fruiting. regular observations will
Peripheral surveys of the native forest on the foothills of
table mountain and that extending out of the Kirstenbosch
Botanical gardens have not revealed evidence of armillaria
root rot. the fact that
a. mellea
is able to fruit profusely in
the gardens suggests that it may spread to native forests
in the vicinity (Fig. 1a) and more careful surveys should be
undertaken to determine whether this is already occurring.
certainly this invasive alien fungus has the capacity to result
in serious disease problems in the native environment as
has been true with the introduced invasive
on
leucodendron argenteum
(silver trees) in
Kirstenbosch (van wyk 1973, linde
et al
. 1997). this potential
risk to Kirstenbosch and the native forest associated with it
the dutchman Jan van riebeeck was the founder and first
commander of cape town between 1652 and 1662. one of his
tasks was to establish a vegetable and fruit garden to provide
ships of the dutch east India company sailing between the
netherlands and east asia with fresh produce and to offset
serious problems due to vitamin c deficiency [for a fascinating
account of the ship’s surgeons of the dutch east India company
see Bruijn (2009)]. this is the origin of the company gardens
and the historic avenue of oak (
quercus robur
) trees that
line government avenue, the death of which prompted the
discovery of
a. mellea
in cape town (coetzee
et al.
2001).
at the time of this discovery, popular press took an interest in
the problem (
) and referred to the
tragic death of historic trees as “van riebeeck’s curse”. the
appearance of
a. mellea
fruiting profusely in Kirstenbosch,
another historic garden of great national importance, suggests
that the fungal “van riebeeck’s curse” remains not only present
but is growing in importance. It further illustrates the devastating
impact that invasive alien pathogens can have on natural woody
ecosystems many years after their introduction.
Fig. 2.
cladogram generated from Its dna sequence data. Bootstrap values are indicated above the tree branches. the year during which
isolates from Kirstenbosch and the company gardens were reported are indicated next to the taxon name. Isolates obtained during this study
Fungal phoenix
we thank the department of science and technology (dst)/ national
research Foundation (nrF) centre of excellence in tree health
anderson JB, ullrich rc (1979) Biological species of
in north america. mycologia
Bruijn I (2009)
ship’s surgeons of the dutch east India company.
leiden university Press, the netherlands.
coetzee mPa, wingfield Bd, coutinho ta, wingfield mJ (2000a)
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species in south africa. mycologia
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wingfield mJ (2000b) geographical diversity of
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ta, wingfield mJ (2001) the root rot fungus
armillaria mellea
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(2003a) molecular identification and phylogeny of
isolates from south america and Indo-malaysia.
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wingfield mJ (2003b) discovery of two northern hemisphere
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wingfield mJ (2005) Identification of
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(1998) Biological species of
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Fungi are a central component of the biosphere, essential for
the growth of over 90 % of all vascular plants (allen 1993),
play an essential role in ecosystem services (Boumans
2002) and it is estimated that there may be as many as 1.5
million species of fungi globally (hawksworth 1991). Fungi
can impact on the outcome of plants and their enemies
et al
. 2006) and are a life support network for most
plants (Bardgett
et al
. 2006). van der heijden
et al.
(1995)
stress the importance of understanding the structure and
function of fungal communities is an important contributor to
the maintenance of plant biodiversity. development of such
a fungal ecology requires an understanding of the spatio-
temporal growth and interaction dynamics both within fungal
communities and between fungi and plant systems. we
therefore propose that an essential step in understanding the
ecology of fungi is to combine: (1) a physiologically-based
model of fungal community dynamics, capturing colony
growth and interactions, in heterogeneous environments;
(2) non-destructive quantication of community growth
patterns through instrumentation; (3) models linking fungal
communities to plant systems; and (4) next-generation
computational approaches to simulate complex systems at
scales consistent with that instrumentation. here, we report
on a special Interest group meeting held during Imc9 that
considered this agenda and the four components needed to
progress our understanding of fungal ecology. additionally
the group considered the notion of fungi as a biological
l co
In Falconer
et al
. (2005, 2007, 2008) we demonstrated the
use of a physiologically-based model to explore the factors
that inuence the nature of fungal community diversity and
the link between individual behaviour and the structure and
function of fungal communities. the model is individual-based
and incorporates the essential physiological processes of
nutrient absorption, within colony biomass transport and
recycling, inhibitor production and growth, and these occur
differentially within a single mycelium as a consequence
of local and non-local context. this differential behaviour
permits different parts of the mycelium to expand and senesce
concurrently. this framework was developed to capture the
minimal set of physiological processes required to reproduce
the observed range in phenotypic response in real colonies:
uptake, redistribution of biomass, remobilisation of biomass,
and growth which are known to be important for vegetative
growth of fungi but have not collectively been incorporated
, adam t. sampson
and nia a.
sImBIos centre, university of abertay dundee, dd1 1hg, dundee scotland uK; corresponding author e-mail: r.falconer@abertay.ac.uk
Institute for arts, media and computer games, university of abertay dundee, dd1 1hg, dundee scotland uK
department of chemistry, university of cambridge, lenseld road, cambridge, cB2 1ew, uK
laboratory of wood technology, department of Forest and water management, ghent university and ugct, university ghent centre for X-ray
tomography, ghent university, coupure links 653, Be-9000 gent, Belgium
abstract:
this contribution, based on a special Interest group session held during Imc9, focuses on physiological based
models of lamentous fungal colony growth and interactions. Fungi are known to be an important component of ecosystems,
in terms of colony dynamics and interactions within and between trophic levels. we outline some of the essential components
necessary to develop a fungal ecology: a mechanistic model of fungal colony growth and interactions, where observed
behaviour can be linked to underlying function; a model of how fungi can cooperate at larger scales; and novel techniques
for both exploring quantitatively the scales at which fungi operate; and addressing the computational challenges arising from
this highly detailed quantication. we also propose a novel application area for fungi which may provide alternate routes for
supporting scientic study of colony behaviour. this synthesis offers new potential to explore fungal community dynamics
and the impact on ecosystem functioning.
article info:
submitted: 30 october 2010; accepted: 15 november 2010; Published: 18 november 2010.
Key words:
Ima Fu
gus
volu
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Falconer
et al
into previous modelling frameworks (Falconer
et al
. 2005). we
have also investigated the consequences of environmental
heterogeneity for biomass distribution (Falconer
et al
. 2007),
identifying which trait sets allowed individuals to persist in
given environmental contexts. the model has been used
to explore the effect of different soil management strategies
on fungal invasion and interactions (Fig. 1; Kravchenko
. 2010). the enhancement of this model to incorporate
inhibitor production that impacts inter-colony interactions is
described in Falconer
et al
. (2008). the model was used to
generate mycelial distribution maps that emerge from fungal
interactions among a community of intrinsically different
individuals (Falconer
et al.
2010). this is the rst attempt to
model (physiologically) the dynamics of a fungal community
in terms of a fungal ecology. we introduced the concept of
a biomass-based abundance distribution function, described
the form of that curve, and made the rst attempt to identify the
traits that affect the form of that curve. ongoing developments
are to apply the model to soil systems to understand the
effect of physical and chemical processes on fungal diversity.
It has been shown by experiments that the fungal colony
exhibits a remarkably complex cooperative behaviour (ritz
1995, hughes & Boddy 1996), and a linked experimental-
theoretical approach by Bown
et al
. (1999) demonstrated
that community scale dynamics are a consequence of non-
independent local interactions. In our development of fungal
ecology, we must also consider such cooperation, and here
l co
In Perez-reche
et al
. (2010), we used probabilistic models
to determine how cooperation at the individual scale led to
epidemic spread at the community scale. to investigate this
phenomenon we constructed a model of fungal invasion that
is spatially explicit and considers heterogeneous, discrete
resource distribution. In general, the transmission of the
fungus from a colonised donor host (
) to a healthy recipient
host (
) does not only depend on the
d-r
pair but it is inuenced
by the environment of the
d-r
pair. on the one hand, the rate of
transmission of the pathogen may be enhanced (constructive
synergy) if the fungus is using resources from several
colonised hosts. on the other hand, the rate can be diminished
(interfering synergy) because of several factors arising from
the competition between different parts of the colony. we have
addressed the question of whether synergistic effects occurring
at the individual scale play an important role in epidemics
spreading at the community-scale. we have also investigated
the effect of synergy on properties such as the foraging strategy
followed by the pathogen, the probability of epidemic invasion,
and the efciency of invasion. the approach is based on an
extension of a spatial model for sIr (susceptible-infected-
removed) processes (grassberger 1983) to incorporate
synergistic effects in the transmission rate between pairs of
hosts depending on the number of infected neighbours to the
pair. analysis of the model by means of numerical simulations
has shown that synergy at the host level has non-trivial
consequences at the population level. the foraging strategy
of the pathogen changes from being explorative for interfering
synergy to being exploitative for constructive synergy. the
invasion in the exploitative regime is temporally more efcient,
i.e., it is quicker, than invasion using an explorative strategy.
however, explorative epidemics are spatially more efcient
than exploitative epidemics because they can lead to invasion
by infecting fewer hosts. the modelling carried out so far is
based on simple assumption such as equal intrinsic infectivity
and susceptibility for all the hosts in the population. extensions
of the model to account for heterogeneity in transmission of
infection and perhaps other factors will be essential to provide
quantitative predictions for possibly invasive epidemics in real
populations. while it is possible to validate models of infection
spread because the domain may be directly observed, such
as in infected plants where the number of lesions can be
determined
via
direct or indirect methods (Jeger 1987), this
is much more challenging for opaque soil and wood systems.
For these systems, in order to obtain the experimental data
for model calibration and validation information regarding
the spatial distribution and biomass amounts is required.
one technique that has been used to determine the physical
architecture of the soil and wood systems is X-ray computed
tomography and progress is being made in quantifying and
visualising fungal biomass
in situ
qu
atI
o
Patte
X-ray computed tomography enables a non-destructive
view of the internal structure of an object and is therefore
an extremely valuable technique in many research elds.
the continuously improving performance of equipment,
Fig. 1.
effect of soil structure on fungal invasions and interactions
for a single soil management practice. Blue and red isosurfaces
correspond to the two boundaries of different fungal species.
modelling fungal colonies and communities: challenges and opportunities
rapidly increasing computing power, and faster algorithms
for reconstruction and data processing make large volume
scanning at high resolutions feasible. the state-of-the-art
equipment at the ugct (centre for X-ray tomography at
ghent university) is highly exible, with in-house developed
software for scanner control, sample reconstruction,
analysis, and visualisation. this set-up allows scanning
with a resolution of 0.2 mm for samples of 37 cm in
diameter down to approximately 400 nm for objects about
the size of a splinter. as such, apart from visualisation, 3d
quantitative information can be retrieved from objects with
a broad range of sizes. sub-micron resolution scanning
should enable the visualisation of fungal hyphae and by
using time-lapse tomography the growth of these tubular
structures could be monitored (van den Bulcke
et al.
2009).
the latter procedure however has associated challenges.
First, fungal growth can interfere with scanning during
moderately long scan times. second, with lab-based X-ray
sources, polychromatic X-rays, scattering, uorescence and
noise disturb the ideal acquisition (vidal
et al
. 2005). third,
at sub-micron resolution phase contrast emerges especially
at sharp edges, complicating thresholding and segmentation.
Fourth, tube shift during long scans at sub-micron resolution
can reduce image quality. Fifth, hyphal tubes are hollow
thin-walled structures, as such having a very low X-ray
attenuation. a drastic solution to some of the problems is the
use of synchrotron radiation, having a monochromatic X-ray
bundle, allowing faster scanning with less heating of the
samples, but access to such facilities is a major bottleneck.
especially the available beam time is limited and as such
this is not an option for long-running experiments, of the
order of days to weeks, and for repeated experiments. many
of the aforementioned problems are handled at the ugct
facility. Post-processing can contribute to the enhancement
of image quality; the phase contrast phenomenon can
be solved using dedicated ltering (Boone
et al.
2009, de
et al.
2009); and tube shift can be counteracted with
correction software. Proper scanning and processing can
result in the visualization of fungal hyphae as illustrated in
Fig. 2, obtained after scanning of a piece of
Pinus sylvestris
subjected to white-rot. In order to study pigmented species
with rather large hyphal structures, such as
(van den Bulcke
et al
. 2008), visualization is easier
due to X-ray interference of the pigment. apart from individual
hypha tracking, processing of X-ray volumes should enable
the quantication of the effects of material degradation on
different spatial scales, which might be an important concept
to implement a degradation monitoring system. with the
existing scanners, frequent scanning and quantication
of degradation or hyphal biomass on a larger spatial scale
will be a very valuable tool for non-destructive time-lapse
analysis. advanced algorithms implementing X-ray physics
during reconstruction will increase image quality, whereas
more advanced image processing code will improve
quantitative results. the eld of X-ray tomography, both hard-
and software, is rapidly evolving and therefore is promising
for in situ fungal monitoring and quantication in wood and
perhaps soil systems in the near future, in addition to other
modalities such as confocal laser microscopy (hickey
et al
atI
tatI
l
our ability to exploit the experimental advantages described
above is currently constrained by the limited scales at which
existing simulation technologies are able to operate. For
example, in spite of data at larger scales, in Falconer
et al
(2010) we use a domain size for the soil/fungal interactions
of approx 1 cm
with a voxel resolution of 30 microns; for
predictions to be useful we need to work at, at the very
Fig. 2.
(a) three dimensional
rendering of hyphal tubes of a white
rot fungus winding around a small
piece of
Pinus sylvestris
in contact
with malt extract agar (lling some
cell lumina). (b) cross-sectional and
(c) longitudinal view illustrating the
high anatomical detail. Bar 200
Falconer
et al
least, core scale (10 cm
). we need simulations to operate
at realistic scales in order to accurately reproduce the
observed, often emergent behaviours we wish to study.
emergent behaviours are often scale-dependent, a simulation
that includes only a restricted region of the system may
demonstrate different emergent behaviours, and we may not
know in advance what scale is appropriate. one approach to
scaling up simulations is to simplify the underlying model, for
example the homogenisation approach proposed by roose
& schnepf (2008), where the environmental heterogeneity is
carefully coarse-grained, and by model reduction, for example
et al
. (2009), where stripping out unnecessary model
components reduces computational demands.
Both raise
considerable difculties. In each case, simplication requires
identication of the important model components, which are
unlikely to be obvious in a complex system. an alternative
approach is to increase the computational power available
to the simulation by taking advantage of multicore cPus,
gPus and clusters. Parallelisation is widely regarded as an
experts-only programming problem, and one that is strongly
tied to the particular computational platform in use.
however,
complex biological systems simulation is a problem with an
inherently high degree of concurrency in the natural system:
a complex system fundamentally consists of a large number
of independent, but interacting, agents and processes.
approaches to parallel programming focus on highly regular
numerical problems, and make building such a simulation
difcult. simulation becomes much more straightforward
with the use of concurrent programming techniques, in which
the concurrent activities in a system and their relationships
are specied, and the execution of those activities in the
most efcient manner across the available resources is
managed automatically by software.
with careful design,
a simulation built this way can be truly scalable, meaning
that its complexity can be increased in a near-linear fashion
by dividing it across more computational resources. this
approach has become particularly interesting with the rise of
grid and cloud computing: researchers can now gain access
as required for a short period of time to a very large number
of nodes upon which to execute their simulation, rather than
relying upon in-house resources. using cloud resources,
we can potentially scale up by a few orders of magnitude.
approaches to scalability and validation in complex systems
simulation are currently being investigated by cosmos
(www.cosmos-research.org), drawing on expertise in
modelling, highly-dependable software engineering and
concurrent programming to develop and document reusable
techniques for complex systems modelling and simulation.
cosmos techniques for parallel, distributed simulation of
agent-based spatial models have been successfully applied
to problems including those in the elds of immunology (in-
silico experimentation with lymphocyte migration (andrews
. 2008) and granuloma formation (Flügge
et al
. 2009)) and
mycology (scaling up of the Falconer
et al
2005 model, in
metaP
Fungal colonies are a highly successful organism,
demonstrating pervasive growth through harsh environments.
they achieve this through their capacity to operate in a
decentralised manner, reacting locally to changes in context
while interoperating at the colony scale and with other
organisms. Fungi have the capacity to recycle biomass,
effecting dynamic reallocation of investment, capitalise on
uxes in available resource and self-heal. these properties
make them attractive metaphors for managing large,
complex, distributed articial networks. other researchers
have used other biological metaphors for similar problems.
For example, ant colonies have been used as a metaphor for
telecommunication routing algorithms. typically, stigmergic
pheromone trails are used to prole rates of ow of ants
and other network trafc and the local strength of the trail
is coupled to the values in local routing tables (e.g. di caro
& dorigo 1998). similarly, in the eld of articial immune
systems, the properties of the immune system have been
used to inspire solutions in the areas of anomaly detection
and data mining (timmis
et al
. 2008). we have been
exploring the potential for fungi as a metaphor for protecting
society’s critical infrastructures. modern societies are heavily
dependent upon a number of critical infrastructure networks
that allow our societies to function, including water, power
and transportation. these networks are open to failure
through a range of processes including shortage of essential
resources, breakdowns at key nodes and surges in demand
and this means that effective management of such networks
is challenging (schulman
et al.
2004). Bebber
et al
. (2007)
recognise that understanding how fungi grow may inform the
design of man-made networks and through image analysis,
have characterised fungal colony growth patterns in terms of
nodes and edges of a graph. they show that fungal colonies
are efcient transport networks that are robust to damage
and react to local variation in resource. In order to translate
the concept into a working solution, we have developed a
graph-based implementation of Falconer
et al
. (2005). we
are now exploring the capacity of our model to provide robust
and resilient management solutions to resource limitations,
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a special Interest group meeting
colletotrichum: species,
ecology and interactions
, was held on 1 august 2010 at the
International mycological congress (Imc9) in edinburgh,
uK. the meeting, organised by Paul cannon (uK) and ulrike
damm (the netherlands), brought together 23 scientists
from 12 countries working in different elds of mycology, but
with a common interest in the genus
. seven
presentations, covering a wide range of topics, ranged
from systematics and population genetics to host-pathogen
interactions and genome projects. this contribution provides
the rst four presentations dealt with systematics and
identication of major
colletotrichum
species complexes
containing various important anthracnose pathogens
worldwide. Four of these species are illustrated in Fig. 1.
while the identity of many important species still require
revision (hyde
et al.
2009), molecular techniques improve the
delimitation of species that are hard to distinguish based on
morphology alone and reveal their phylogenetic relationships
et al.
2009, crouch
et al.
2009, damm
et al.
2009). this
will inevitably result in name changes but has implications
for everyone working with this genus, especially plant
pathologists, and will improve our understanding of the role
ulrike damm gave an overview of her ongoing
collaboration with Paul cannon about the phylogeny of three
species complexes. the aim of this project is to delimitate
species within these complexes, characterise known and
new species and designate epitypes to provide the basis for
accurate identications of
species. this goal
has so far been achieved for species with curved conidia from
herbaceous hosts (damm
et al.
2009), which in the past were
mostly identied as
c. dematium
. multi-gene analyses and
morphological characterisation revealed several diverse and
distantly related species, including four new species. seven
species were epitypied, including
c. dematium
and the type
species of the genus,
c. lineola
. a second study conrmed
most of the previously recognised groups (sreenivasaprasad
& talhinhas 2005) within the
c. acutatum
species complex.
most of these could be dened on the basis of type strains or
strains suitable for epitypication. literature reports (lubbe
2004, Johnston
et al.
2005) and preliminary studies using
Its sequence data indicated that
c. boninense
represents a
species complex as well. a multilocus molecular phylogenetic
, yasuyuki Kubo
, Bevan weir
, Kae yoshino
and Paul F.
cBs-Knaw Fungal Biodiversity centre, uppsalalaan 8, 3584 ct utrecht, the netherlands; corresponding author e-mail: u.damm@cbs.
knaw.nl
school of life sciences, university of warwick, wellesbourne, warwick, cv35 9eF, uK
Key laboratory of systematic mycology & lichenology, Institute of microbiology, chinese academy of sciences, no. 10, north 4
west, Beijing 100190, P.r. china
Kyoto Prefectural university, 1-5 hangi-cho, shimogamo, sakyo-ku, Kyoto, Japan
landcare research, Private Bag 92170 auckland, new zealand
graduate school of agriculture, Kyoto university, sakyo-ku, Kyoto 606-8502, Japan
caBI europe-uK, Bakeham lane, egham, surrey tw20 9ty, uK; and royal Botanic gardens, Kew, surrey tw9 3aB, uK
abstract:
the presentations of the special Interest group meeting
colletotrichum: species, ecology and
, held on 1 august 2010 during Imc9 in edinburgh, uK, are outlined. seven research projects,
ranged from systematics and population genetics to host-pathogen interactions and genome projects were
presented. the meeting revealed that currently major species complexes in the genus
are
being revised and the identities of many pathogens claried on the basis of molecular phylogenies, and that
the genomes of four species are sequenced and decoded providing an enormous amount of data that are
article info:
submitted: 27 october 2010; accepted: 20 november 2010; Published: 23 november 2010.
Key words:
Ima Fu
gus
volu
me
1
o 2: 161–165
amm
et al
analysis of strains previously identied as
c. boninense
resulted in clades that could be recognised as separate
species with differences in host range, distribution and
morphology, including
c. boninense sensu stricto
c. hippeastri
and several presumably new species.
most of the species in the
c. boninense
complex and some
in the
c. acutatum
species complex form teleomorph states
in culture. Publications on the
c. acutatum
and
c. boninense
species complexes will appear in a 2011 issue of
studies in
mycology.
colletotrichum gloeosporioides
sensu lato
is a species
complex with broad genetic and biological diversity grouped
together by similar conidial morphology and Its sequences.
Bevan weir and Peter Johnston
(landcare research,
auckland, new zealand) presented their research on this
species complex and possible approaches to species
delimitation through the genealogical concordance
Phylogenetic species recognition (gcPsr). It was shown
that that the taxa
c. musae
,
c. kahawae
,
c. xanthorrhoeae
c. nupharicola
,
c. fragariae,
c.
gloeosporioides
sensu
stricto,
c. horii
,
c. theobromicola
,
c. ignotum
,
c. tropicale
,
c.
asianum
,
c. siamense
,
c. fructicola
and
c. hymenocallidis
as well as many putative undescribed species are part of
the
c. gloeosporioides
sensu lato
complex. they recently
characterised and neotypied one of these species,
c. horii
(weir & Johnston 2010). the gcPsr concept was used
to delimit taxa within
c. gloeosporioides
sensu lato
. this
concept considers that phylogenetic trees of different genes
show discordance within a species due to gene ow between
individuals. the common node where different gene trees
show concordance is considered the speciation point.
they applied the gcPsr with eight genes using recently
developed Bayesian analysis tool, BucKy (ané
et al.
2007).
the gcPsr concept worked well for species delimitation
along currently recognised lines, except for
c. kahawae
which was insufciently distinct from several genetically
similar non-coffee Berry disease causing taxa. It was
suggested that this may be due to the recent emergence
(1920) of
c. kahawae
as a pathogen and that insufcient
time had passed for ecological niche specialisation to show
as mutations in the genes used. they suggested that
c.
kahawae
be recognised at the subspecic rank. a publication
on their work on the
c. gloeosporioides
sensu lato
species
complex will appear in the 2011 studies in mycology issue
on
colletotrichum
as well.
colletotrichum acutatum
causes economically signicant
losses of temperate, subtropical and tropical crops. globally,
c. acutatum
populations display considerable genotypic
and phenotypic diversity. riccardo Baroncelli (university
of warwick, wellesbourne, uK) presented his research on
evolutionary relationships in
c. acutatum
populations in
collaboration with charles lane (Fera, sand hutton, york,
uK) and Prasad sreenivasaprasad (university of warwick,
wellesbourne, uK). the overall objective is to understand the
evolutionary relationships within the species with particular
reference to the pathogen populations associated with the
strawberry production systems in the uK. more than 150
c. acutatum
isolates related to different hosts worldwide
have been assembled. Phylogenetic analysis of sequence
data from the rdna block, mat1-2 and βtubulin-2 genes
shows eight distinct genetic groups within
c. acutatum
. the
subsets of isolates represented within these genetic groups
corresponded to the previously identied groups a1 to a8.
almost all of the homothallic isolates capable of sexual
reproduction comprise a single genetic group, a7. Isolates
representing populations capable of heterothallic sexual
Fig. 1.
conidiomata and conidia of four
species.
a, e.
c. acutatum
(cBs 112996, ex-paratype strain).
B, F.
c. lineola
(cBs
125337, ex-epitype strain).
c. truncatum
(cBs 151.35, ex-epitype strain).
c. gloeosporioides
(cBs 112999, ex-epitype strain).
F,
conidia on sna.
conidiomata on sna.
, e.
conidiomata on
stem. scale bars: a 10 μm, B 100 μm, e 200 μm. a
applies to a, c, F, h. B applies to B, d, g.
colletotrichum
: species, ecology and interactions
reproduction belong to two distinct genetic groups a3 and
a5. molecular characterisation of
c. acutatum
populations
representing the introduction and spread of the pathogen
in the strawberry production systems in the uK showed the
presence of three genetic groups (a2, a3 and a4). their
results suggest the existence of
c. acutatum
populations
potentially undergoing speciation processes, related to their
reproductive behaviour and host association patterns. Further
lei cai (Key laboratory of systematic mycology &
lichenology, Institute of microbiology, Beijing, china)
and Kevin hyde (school of science, mae Fah luang
university, chiang rai, thailand) presented their research
colletotrichum
species from asian fruits and leaves.
Fruit rots (anthracnose) were previously often attributed to
c. gloeosporioides
c. acutatum
. Identications were,
however, based on morphological characters or, if gene
sequence data were used, comparisons were often made
with wrongly applied names.
colletotrichum gloeosporioides
was recently epitypied (cannon
et al.
2008) so that living
cultures and sequence data are, for the rst time available
for comparison with fresh collections. analysis of sequence
data of 25 isolates (selected from 140 obtained strains based
on diversity of host and morphology) from eight tropical fruits
are compared with the
c. gloeosporioides
epitype. contrary
to previous assumptions, none of these isolates from tropical
fruits was
c. gloeosporioides sensu stricto
2010). the ve gene regions used in this study resolved
c. asianum, c fructicola, c. horii, c. kahawae
in the
c. gloeosporioides
species complex
as distinct phylogenetic lineages with high statistical support.
many tested strains could not be assigned to any known taxa
in this analysis. they also reported
amaryllidaceae, orchidaceae, cordyline
and
Jasminum sambac
, with the latter including two new species
et al.
2010), and updated the typications of
species provide excellent models for studying
fungal-plant interactions (Perfect
et al.
1999). several large-
scale genome projects are in progress for
species aiming to produce high-quality assemblies of the
genome sequences to provide resources for comparative
genomics and the molecular analysis of fungal pathogenicity,
which allows the identication of genes and proteins relevant
is a destructive pathogen of
maize, causing stalk rot and leaf blight, while
attacks many cultivated forms of
as well as
arabidopsis thaliana
, providing a model pathosystem in which
both partners can be genetically manipulated (o’connell
2004). Both pathogens employ a hemibiotrophic infection
strategy, but while the biotrophic phase of
c. graminicola
extends into many host cells, that of c.
is
conned to single epidermal cells. richard o’connell (max
Planck Institute for Plant Breeding research, cologne,
germany) gave an overview of the
c. higginsianum
and
genome research, which he is conducting in
collaboration with
lisa vaillancourt (university of Kentucky,
usa), li-Jun ma
(mIt-Broad Institute, usa) and mike thon
(cIale-university of salamanca, spain).
comparing the
genomes of two species with contrasting pathogenic lifestyles
and host specicities will allow them to study lineage-specic
expansions and contractions of gene families and identify
genes undergoing rapid evolution (diversifying selection),
which may be involved in interactions with the host plant,
e.g. those encoding secreted effector proteins. the 57.4 mb
genome of
c. graminicola
comprises 13 chromosomes and
was sequenced at the Broad Institute (8X sanger, 11X paired-
end 454) giving an assembly of 1,151 contigs in 653 scaffolds
), to carry
out a whole genome sequence of the ex-epitype strain of
(ImI 356878). the dna sequencing phase is
nearing completion and they are going to start soon with the
assembly.
the meeting provided good evidence of the rapidity
with which our understanding is improving of
genomics, and nicely complemented the outputs of another
workshop that was held earlier in 2010, in
conjunction with the 10
european conference on Fungal
genetics in leeuwenhorst, the netherlands. It was particularly
exciting to witness the increasing power of genomic research
tools, and their potential impact on our understanding of fungal
systematics and speciation. It provided good opportunities to
coordinate research programmes, exchange data and share
alan Buddie (caBI europe-uK, egham, uK) is thanked for sharing
ané c, larget B, Baum da, smith sd, rokas a (2007) Bayesian
estimation of concordance among gene trees.
molecular Biology
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t, sakai y, takano y (2009) atg26-mediated Pexophagy Is
required for host Invasion by the Plant Pathogenic Fungus
cai l, hyde Kd, taylor PwJ, weir Bs, waller J, abang mm, zhang
Jz, yang yl, Phoulivong s, liu zy, Prihastuti h, shivas rg,
mcKenzie ehc, Johnston Pr (2009) a polyphasic approach for
cannon PF, Buddie ag, Bridge Pd (2008) the typication of
crouch Ja, clarke BB, white Jw, hillman BI (2009a) systematic
analysis of the falcate-spored graminicolous
and
a description of six new species of the fungus from warm-season
damm u, woudenberg Jhc, cannon PF, crous, Pw (2009)
species with curved conidia from herbaceous
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o’connell r, Kubo y (2010) Peroxisome biogenesis factor
PeX13 is required for appressorium-mediated plant infection
by the anthracnose fungus
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Ph, chen h, Johnston Pr, Jones eBg, liu zy, mcKenzie ehc,
moriwaki J, noireung P, Pennycook sr, Pfenning lh, Prihastuti
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metabolic Function Is required for appressorium-mediated
Plant Infection by
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species
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pathosystem for the molecular dissection of plant-fungal
colletotrichum
: species, ecology and interactions
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a model genus for studies on pathology and fungal–plant
interactions.
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chukeatirote e, Kd (2010)
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is
not a common pathogen on tropical fruits.
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, a cosmopolitan pathogen
causing anthracnose on a wide range of hosts.
molecular Plant
takano y, Kubo y, Kuroda I, Furusawa I (1997) temporal
transcriptional pattern of three melanin biosynthesis genes,
PKs1, scd1, and thr1, in appressorium-differentiating and
nondifferentiating conidia of
colletotrichum lagenarium
tanaka s, Ishihama n, yoshioka h, huser a, o’connell r, tsuji g,
tsuge s, Kubo y (2009)
colletotrichum orbiculare
ssd1 mutant
enhances plant basal resistance through activation of a mitogen-
activated protein kinase pathway.
tsuji g, Fujii s, Fujihara n, hirose c, tsuge s, shiraishi t, Kubo y
agrobacterium tumefaciens
-mediated transformation for
random insertional mutagenesis in
colletotrichum lagenarium
weir Bs, Johnston Pr (2010) characterisation and neotypication
gloeosporium kaki
hori as
colletotrichum horii
nom. nov.
111
wikee s, cai l, Pairin n, mcKenzie ehc, su y-y, chukeatirote e, thi
hn, Bahkali ah, moslem, ma, abdelsalam K, hyde Kd (2010)
species from Jasmine (
Jasminum sambac
amm
et al
© 2010 International mycological association
you are free to share - to copy, distribute and transmit the work, under the following conditions:
you must attribute the work in the manner specied by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
you may not use this work for commercial purposes.
you may not alter, transform, or build upon this work.
For any reuse or distribution, you must make clear to others the license terms of this work, which can be found at http://creativecommons.org/licenses/by-nc-nd/3.0/legalcode. any of the above conditions can be waived if you get
permission from the copyright holder. nothing in this license impairs or restricts the author’s moral rights.
the presentations at the session demonstrated that
current species recognition in lichen forming-fungi vastly
underestimates the true number of species. Based on
phylogenetic and population studies, many cases were
presented showing that numerous distinct lineages are
hidden under a single species name. the issues raised
can be grouped under the following headings: naming
cryptic species, numbers of cryptic species, recognition
of cryptic species, supporting species separations,
and phylogeographic correlations. collectively, these
presentations provide a synopsis of the current state of
the recognition and naming of cryptic species from cryptic
lineages was discussed and approaches and options were
suggested. hawksworth (2010) examined different groups
as foraminifera, plant-pathogenic fungi, insects, and plants.
the main species concepts were reviewed, and a pragmatic
concept was proposed, dening a species as “groups of
individuals separated by inheritable discontinuities and
which it is useful to give a species name to” (hawksworth
1996, 2010). the term cryptic species was circumscribed
as “populations which are phylogenetically distinct and able
to reproduce themselves, by sexual means or otherwise,
but which are distinguished by molecular or other features
that are either not evident macroscopically or generally
an increasing number of lichen-forming species are used
as biomonitors or bioindicators of pollutants, environmental
disturbance, or ecological continuity. consequently there was
the issue of how to proceed when cryptic species or lineages
are found in taxa used in such studies where identications
need to be made quickly during eld assessments – and
access to a modern molecular laboratory is impractical. an
acceptable way of referring to such groups of species was
commended by hawksworth (2010). the term “complex” or
“aggregate” was supported as used when the populations are
closely related, i.e. have a recent shared common ancestor.
this practice is already familiar to and regularly used by
botanists, citizen scientists, and ecologists dealing with
complexes in plants, for example the
rubus fruticosus
aggr.
taraxacum ofcinale
aggr.
In some situations, however, the option of recognizing
subspecies was suggested as perhaps the most appropriate
solution, for example in paraphyletic populations (Figs 1 and
2) such as that of
Parmelina pastillifera
and
P. tiliacea s. str.
et al.
2010) (Fig. 1). In contrast, in cases
where the cryptic taxa are not closely related but a result of
convergence, i.e. they do not either occupy the same clade or
have a recent common ancestor, it has to be recognized that
the “complex” approach could give a misleading impression
of afnity, as in
Parmelina cryptotiliacea
(núñez zapata
et al.
2010) or lineages in
Parmelia saxatilis
(divakar
et al.
2010b).
and h. thorsten lumbsch
departamento de Biología vegetal II,Facultad de Farmacia, universidad complutense de madrid, e-28040 madrid, spain; corresponding author
e-mail: acrespo@farm.ucm.es
department of Botany, the Field museum, 1400 south lake shore drive, chicago, Illinois 60605, usa
abstract:
this contribution provides a synopsis of the presentations and discussions during the sIg session on
cryptic speciation in lichen-forming fungi held during Imc9. In several cases, a re-examination of morphology against
the background of molecular phylogenetic evidence revealed, sometimes subtle, morphological and/or chemical
characters, supporting the distinction of particular clades at species level. however, there are also examples of cryptic
species in which no morphological characters could be identied to distinguish between lineages. several cases were
presented in which distinct lineages are correlated with biogeographical patterns. when and how to name cryptic
species was debated, and the use of terms such as “complex” or “aggregate” commended where the taxa formed part
article info:
submitted: 5 november 2010; accepted: 15 november 2010; Published: 23 november 2010.
Key words:
Ima Fu
gus
volu
me
1
o 2: 167–170
respo and
umbsch
there is a growing body of evi
dence that the approach to
current species recognition in lichenized fungi, which is largely
based on morphology and chemistry, vastly underestimates
the number of phylogenetic species. Phylogenetic studies
repeatedly indicate that numerous distinct lineages can be
hidden under a single species name (arguello
et al.
2007,
Baloch & grube 2009, grube & Kroken 2000, Kroken & taylor
2001, molina
et al.
2004, wirtz
et al.
2008). In a number of
cases, morphological or chemical differences have been
preted as intraspeci
c variability. re-examination of
morphology against the background of a molecular phylogeny
often reveals, sometimes subtle, and previously overlooked
or viewed as unimportant, morphological and/or chemical
characters, supporting the dis
tinction of these clades at
species level (arguello
et al.
2007, divakar
et al.
2005a,
2005b, molina
et al.
2004, wirtz
et al.
2008). however, there
are also cases of cryptic species in which no morpho
characters have yet been identied to distinguish distinct
lineages. In several cases, distinct lineages are correlated
with distinct bio
geographical patterns (arguello
et al.
2007,
et al.
2010, molina
et al.
2004, wirtz
et al.
2008).
Phylogenetic studies identied distinct lineages that occur in
different geo
the large and increasing number of cryptic lineages detected
in fungi means that the recognition of these lineages as
separate taxa is a major issue of current fungal taxonomy
Fig. 1.
Phylogenetic tree of
(
). majority rule consensus tree based on 18000 trees from B/mcmc tree sampling
procedure from a combined data set of nuIts rdna and mtlsu rdna sequences. Posterior probabilities ≥0.95 in the Bayesian analysis are
the branches and mP boostrap values ≥0.75 below branches. Branches with signicative support in both analyses are in
bold. (au austria, cI canary Islands, Fr France, ge germany, In India, It Italy, mo morocco,
sP spain, sv slovenia, tK turkey, tn
tunisia, usa united states of america). Figure provided by nuñez-zapata
ryptic species in lichen-forming fungi
(crespo & Pérez-ortega 2009, hawksworth 2001). however,
cryptic species in lichen-forming fungi may be compared to
fungi with other biologies where morphological characters
are almost absent, thus the pertinence of using this concept
in lichens was discussed (hawksworth 2010, Pérez-ortega &
Printzen 2010). unlike many microscopic fungi, some groups
of lichens form distinctive macroscopic structures, frequently
with a foliose or fruticose form, and with easily observable
phenotypical differences. despite these structures, the
plasticity of morphological and chemical characters in these
fungi results in a relatively high number of lichens, species or
genera, being “difcult” for identication, often accompanied
by a frequent lack of generative characters (divakar
et al.
2010b) or the frequency of homoplasy and convergence of
characters (grube & hawksworth 2007, muggia 2010, muggia
although only relatively few lichens have yet been
identied as comprising cryptic species using molecular data
(grube & Kroken 2000, Kroken & taylor 2001, crespo
et al.
2002, Feuerer & thell 2002, Printzen
et al.
2003, molina
. 2004, argüello
et al
. 2007, wirtz
et al.
2008, Fehrer
et al.
2009, divakar
et al.
2010a), assemblages of morphologically
similar species where identication remains dubious due to
variability or ambiguity of key characters used to distinguish
those taxa are common. thus, morphological identication
of a lichen-forming species, sometimes even a genus, can
be difcult. therefore, cryptic taxa have been recognised
historically in lichens, although not necessarily by that term.
“the recognition and characterization of cryptic species is
a burgeoning and exciting activity in current systematics,
and a major challenge for mycologists of all kinds, not least
lichenologists” (hawksworth 2010). suggestions for when to
formally recognise species within cryptic lineages that are
found in molecular studies were discussed (muggia 2010,
Pérez-ortega & Printzen 2010), and a consensus of the session
was to recognise species formally when the phylogeny was
unequivocal and other evidence supported their separation,
whether ultramicroscopic, “new” morphological, ecological
(muggia 2010) or geographical (Parnmen
et al.
2010) were
ePa
atI
recent molecular phylogenies have supported some species
separations that were previously based on subtle characters:
for example,
Parmelina carporrhizans
and
P. quercina
(argüello
et al.
2007, divakar
et al.
2010b),
caloplaca alociza
and
c. albopruinosa
(muggia 2010). It is also frequently found
that distantly related major lineages show a surprising degree
of morphological convergence. examples of this phenomenon
can be found within large families such as
Parmeliaceae
.
For example,
Parmelina
and
austroparmelina
were recently
separated as independent genera based on geography and
phylogeny. however, all species of
austroparmelina
were
previously included in concept of the genus
Parmelina
(crespo
et al.
2010, divakar
et al.
2010b). also there are examples in
microlichens, as in
capnodiales
where the morphologically
similar genera
racodium
and
cystocoleus
belong to
independent lineages in recent phylogenetic studies (muggia
et al.
2008, muggia 2010).
atI
a number of lichen-forming species were historically thought
to have wide distributions, including cosmopolitan and
pantropical species. however, while that may be so for some
species, molecular analyses have repeatedly demonstrated
that many lineages can be hidden under a similar morphology.
several examples were discussed in the symposium (divakar
2010, muggia 2010, Parnmen
et al.
2010). divakar
et al.
(2010) also found a correlation between reproductive modes
and distribution patterns. In fertile species, cryptic lineages
were frequently found, and geographically disjunct populations
were discovered to represent different lineages (divakar
et
al.
2010a). several examples of this type were presented,
including
melanelixia glabra
and
Parmelina quercina,
two
species distributed in areas with winter rain (mediterranean
climate) in north africa, europe and north america (argüello
et al.
2007, divakar
et al.
2010a, b). In sorediate taxa, cryptic
Fig. 2.
Parmelina pastillifera
(maF 16473; upper) and
P. tiliacea
(maF 16632; lower) both showing isidia, but in
P. pastillifera
they are
P. tiliacea
respo and
umbsch
lineages have also been found, but in this case the lineages
can include specimens from different geographical regions;
examples include
Flavoparmelia caperata, Parmotrema
reticulatum
, and
P. tinctorum
(divakar
et al.
2005, 2010).
we acknowledge the participation of david l. hawksworth (university
complutense of madrid, spain) in nalizing this article; his revision
enriched the manuscript with important suggestions improving the
text. this work was supported by the spanish ministerio de ciencia
e Innovación (cgl 2010-21646/Bos, cgl2007-64652/Bos) and a
grant of the national science Foundation to h.t.l. (“hidden diversity
argüello a, del Prado r, cubas P, crespo a (2007)
Parmelia quercina
) includes four phylogenetically
supported morphospecies.
Biological Journal of the linnean
Baloch e, grube m (2009) Pronounced genetic diversity in tropical
crespo a, molina mc, Blanco o, schroeter B, sancho lg,
hawksworth dl (2002) rdna Its and β-tubulin gene sequence
analyses reveal two monophyletic groups within the cosmopolitan
crespo a, Pérez-ortega s (2009) cryptic species and species pairs
in lichens: a discussion on the relationship between molecular
phylogenies and morphological characters.
anales del Jardín
crespo a, Ferencova z, Pérez-ortega s, elix Ja, divakar PK (2010)
, a new australasian lineage in parmelioid lichens
systematics and Biodiversity
divakar PK, molina mc, lumbsch ht, crespo a (2005a)
, a new lichen species related to
Parmelia sulcata
) based on molecular and morphological data.
divakar PK, Blanco o, hawksworth dl, crespo a (2005b) molecular
phylogenetic studies on the
Parmotrema reticulatum
(syn.
rimelia reticulata
) complex, including the conrmation of
P.
as a distinct species.
: 55–65.
divakar PK, Figueras g, hladun n, crespo a (2010a) morphological
versus phylogenetic species: an example from
Parmeliaceae
Fungal diversity
: 47–55.
divakar PK, cubas P, Blanco o, del-Prado r, núñez-zapata J,
roca-valiente B, lumbsch ht, crespo a (2010b) an overview
on hidden diversity in lichens:
Fehrer J, slavíková-Bayerová Š, orange a (2008) large genetic
divergence of new, morphologically similar species of sterile
lichens from europe (
concordance of dna sequence data with secondary metabolites.
Feuerer t, thell a (2002)
Parmelia ernstiae
– a new macrolichen from
germany.
mitteilungen aus dem Institut für allgemeine Botanik in
grube m, hawksworth dl (2007) trouble with lichen: the re-evaluation
and re-interpretation of thallus form and fruit body types in the
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grube m, Kroken s (2000) molecular approaches and the concept of
species and species complexes in lichenized fungi.
hawksworth dl (1991) the fungal dimension of biodiversity:
magnitude, signicance, and conservation.
hawksworth dl (1996) microbial collections as a tool in biodiversity
and biosystematic research. In
culture collections to Improve
the quality of life
(samson ra, stalpers Ja, mei d van der,
stouthamer ah, eds): 26–35. Baarn: centraalbureau voor
hawksworth dl (2001) the magnitude of fungal diversity: the 1.5
million species estimate revisited.
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should it be handled taxonomically?
Kroken s, taylor Jw (2001) a gene genealogical approach to
recognize phylogentic species boundaries in the lichenized
molina mc, crespo a, Blanco o, lumbsch ht, hawksworth dl (2004)
Phylogenetic relationships and species concepts in
s.
str. (
Parmeliaceae
) inferred from nuclear Its rdna and β-tubulin
muggia l (2010) the Implications of morphological and Phylogenetic
species concepts in lichens.
muggia l, hafellner J, wirtz n, hawksworth dl, grube m (2008) the
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racodium rupestre
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cryptic species in the lichen forming fungus
Parmelina tiliacea
Parnmen s, rangsiruji a, mongkolsuk P, Boonpragob K, lumbsch
ht (2010) species delimitations and evolutionary history of the
cladia aggregata
aggregate (
lecanorales
Pérez-ortega s, Printzen c (2010) species delimitation in lichens:
using morphology and molecular markers to nd species
vinuesa m, sanches-Puelles Jm, tibell l (2001) Intraspecic
variation in
mycocalicium subtile
(
) elucidated
by morphology and the sequences of the Its1-5.8s-Its2 region
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): a cohesion approach of species recognition for
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mycological research
112
© 2010 International mycological association
you are free to share - to copy, distribute and transmit the work, under the following conditions:
you must attribute the work in the manner specied by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
you may not use this work for commercial purposes.
you may not alter, transform, or build upon this work.
For any reuse or distribution, you must make clear to others the license terms of this work, which can be found at http://creativecommons.org/licenses/by-nc-nd/3.0/legalcode. any of the above conditions can be waived if you get
permission from the copyright holder. nothing in this license impairs or restricts the author’s moral rights.
Penicillium
species are commonly occurring worldwide, and
have been isolated from various substrates including air, soil,
various food and feed products and indoor environments (Pitt
1979, samson
et al.
2010, houbraken
et al.
2010).
Penicillium
roqueforti
is a member of this genus is and this species has both
adverse and benecial properties. the main benecial property
of this species is its role in the production of blue-veined cheeses,
such as roquefort, danish blue, and gorgonzola (nichol
2000). however, this species is also frequently encountered
as a spoilage organism, and is able to damage a vast array of
food and feed products, due to its ability to grow under harsh
conditions. these conditions include growth at low oxygen and
high carbon dioxide levels, in the presence of preservatives and/
or at low temperatures (samson
et al
. 2010).
the taxonomy of series
roqueforti
was studied by samson
& Frisvad (2004) using a polyphasic approach, combining
partial β-tubulin sequences, extrolite patterns, phenotypic
and physiological data. they showed that
P. paneum
and
P.
carneum
are closely related to
P. roqueforti
, together forming
the series
roqueforti
. this series shares certain characters,
such as a fast growth rate on agar media, the ability to grow
on malt extract agar supplemented with acetic acid and the
production of the extrolite roquefortine c. despite the various
shared characters, also various features are known to
differentiate between these species (Frisvad & samson 2004,
Karlshøj & larsen 2005, o’Brien
et al
. 2008). these include
the growth rate at 30 °c, reverse colours on czapek yeast agar
and yeast extract agar, extrolite patterns and ehrlich reaction
(samson & Frisvad 2004, samson
et al.
2010).
various fungi were isolated during the course of a
survey in a cold-store of apples in the netherlands. the
apples were stored in wooden crates, which were covered
by a white fungal growth of
Fubulorhizoctonia psychrophila
the latter species only grows at temperatures below
20 °c, and during the isolation of this species growth of an
species was detected. this
species appeared to be related to the series
and
a detailed study was performed on these isolates using a
polyphasic approach. For the phylogenetic analysis, Its,
partial β-tubulin and calmodulin sequences were used, and
these data were combined with extrolite analysis and macro-
and microscopical characteristics. the combination of these
datasets show that this species is new and is here described
ate
l
all examined strains belong to the
series
. the strains (table 1) were grown for 7 d as three
point inoculations on czapek yeast agar (cya), malt extract
agar, yeast extract sucrose agar (yes), creatine sucrose
agar (crea) and oatmeal agar (oa). the effect of various
incubation temperatures (9–36 °c with intervals of 3 °c) on
the growth was studied on cya and oa.
genomic dna was isolated using the ultraclean™ microbial
dna Isolation Kit (moBio, solana Beach, ca, usa) according
and robert a. samson
cBs-Knaw Fungal Biodiversity centre, uppsalalaan 8, nl-3584 ct utrecht, the netherlands; corresponding author e-mail: j.houbraken@cbs.
knaw.nl
department of systems Biology, Building 221, søltofts Plads, technical university of denmark, dK-2800 Kgs. lyngby, denmark
abstract:
various fungi were isolated during the course of a survey in a cold-store of apples in the netherlands. one
of these fungi belongs to the genus
and produces cleistothecia at 9 and 15 °c. a detailed study using a
combination of phenotypic characters, sequences and extrolite patterns showed that these isolates belong to a new
species within the series
. the formation of cleistothecia at low temperatures and the inability to produce
roquefortine c, together with a unique phylogenetic placement, make these isolates a novel entity in the
series. the name
sp. nov. (cBs 128137
article info:
submitted: 28 october 2010; accepted: 19 november 2010; Published: 23 november 2010.
Key words:
P. paneum
Ima Fu
gus
volu
me
1
o 2: 171–180
oubraken
et al
table 1.
strains used in this study.
IBt 21509 IBt 3473 IBt 6753
P. carneum
atcc 46837 IBt 6885
P. carneum
IBt 3466
P. carneum
112297
IBt 6884
P. carneum
type, mouldy rye bread, denmark
IBt 12392
P. paneum
IBt 11839
P. paneum
IBt 13929
P. paneum
mouldy baker’s yeast, vangede, denmark
IBt 21541 IBt 12407
P. paneum
type, mouldy rye bread, denmark
112296
IBt 21729
P. paneum
cassava chips, africa
112294
IBt 16402 nrrl 1168
P. paneum
dto 70g9 IBt 29551
P. psychrosexualis
type, wooden crate in cold-store of apples, the netherlands
dto 70h7
P. psychrosexualis
wooden crate in cold-store of apples, the netherlands
dto 70h4
P. psychrosexualis
wooden crate in cold-store of apples, the netherlands
dto 70h9
P. psychrosexualis
wooden crate in cold-store of apples, the netherlands
IBt 19475 mucl 8491
P. roqueforti
atcc 10110 atcc 1129 cect
2905 IBt 6754 IFo 5459 ImI
024313 nrrl 849
P. roqueforti
IBt 19781 ImI 291202
P. roqueforti
IBt 21543
P. roqueforti
mouldy baker’s yeast, denmark
atcc 24720 Frr 1480 IBt 19476 ImI
174718 ImI 291199 vKm F-1748
P. roqueforti
the manufacturer’s instructions. the Its regions (Its), a part of
the β-tubulin (Bena) or calmodulin (cmd) gene were amplied
and sequenced according the method described in houbraken
et al.
(2007). each dataset was aligned using the clustal w
program in mega5 (tamura
et al.
2007), and subsequently
manually optimised. the evolutionary history was inferred
by using the maximum likelihood (ml) method based on
the tamura-nei model (tamura & nei 1993). the bootstrap
consensus tree inferred from 1
000 replicates is taken to
represent the evolutionary history of the taxa analysed (tamura
et al.
2007). the percentage of replicate trees in which the
associated taxa clustered together in the bootstrap test (1
000
replicates) is shown next to the branches. Initial tree(s) for the
heuristic search were obtained automatically as follows. when
the number of common sites is < 100 or less than one fourth of
the total number of sites, the maximum parsimony method was
used; otherwise BIonJ method with mcl distance matrix was
used. the tree is drawn to scale, with branch lengths measured
in the number of substitutions per site. all positions containing
gaps and missing data were eliminated. evolutionary analyses
were conducted in mega5 (Felsenstein 1985, tamura
et al.
2007). all phylograms were rooted with
Penicillium egyptiacum
cBs 244.32
nt
. the newly obtained sequences were deposited
in genBank under accession numbers hq442319–hq442359.
Plugs with mycelium and agar were extracted from 7 d old
cultures grown on cya and yes. extracts were prepared
using the method described by smedsgaard (1997).
each extract was ltrated through a 0.45 PtFe lter and
subsequently analysed using hPlc with diode array
detection (dad) detection. the uv spectrum and the rI
value, and comparison with authentic chemical standards,
were used to characterise the extrolites produced (Frisvad
& thrane 1987).
the Its regions and parts of the β-tubulin (Bena) and
calmodulin (cmd) gene were sequenced and analysed. the
Bena alignment included 432 positions, and 35 positions
were parsimony informative. the bootstrap consensus tree
based on the results of the maximum likelihood analysis
of this alignment is shown in Fig. 1. the total length of the
calmodulin alignment was 500 positions long, and 27 sites
were parsimony informative. the bootstrap consensus tree
derived from the maximum likelihood analysis is shown in
Fig. 2. the phylogram in Fig. 3 is based on the Its regions
(incl 5.8s rdna), and 585 bases were used in the maximum
likelihood analysis. of these 585 characters, 16 were
the result of the analysis of the three datasets shows
that
P. psychrosexualis
belongs to the series
roqueforti
. the
species is related to
P. carneum
and
P. roqueforti
in all three
analysed loci, and
P. paneum
is basal to these three species.
Penicillium carneum
is the closest relative of
P. psychrosexualis
in the tubulin phylogram (99 %, Fig. 1), and
P. roqueforti
is
basal to these two species. however, this relationship is not
supported in the phylograms based on the calmodulin and Its
sequences. In these datasets,
P. carneum
and
P. roqueforti
are
ex in
Penicillium
series
roqueforti
N
+*-!!ee)'
N
N
N
N
N
N
N
N
N
N
,.
N
+*-!!ee)l
N
.
N
N
N
+*-!!ee)&
N
N
Fig. 1.
Bootstrap consensus tree from a maximum likelihood
analysis of partial β-tubulin sequences. the bootstrap values
from 1
000 replicates are shown at the nodes, the branches in
bold have a bootstrap support higher than 95 %. the tree was
Ne!.*#1)
+*-!!ee)'
.
Ne!.*#1)
Ne!.*#1)
Ne!.*#1)
N.+-1#l+.0'
N.+-1#l+.0'
N.+-1#l+.0'
,.
N.+-1#l+.0'
N,/3e&.+/#21!('/
N,/3e&.+/#21!('/
.
N,/3e&.+/#21!('/
.
N,!*#1)
N,!*#1)
N,!*#1)
+*-!!ee)l
N,!*#1)
+*-!!ee)&
N,!*#1)
,.
N#%3,0'!e1)
Fig. 2.
Bootstrap consensus tree from a maximum likelihood
analysis of partial calmodulin sequences. the bootstrap values
from 1
000 replicates are shown at the nodes, the branches in
bold have a bootstrap support higher than 95 %. the tree was
oubraken
et al
sister species and in both cases
P. psychrosexualis
is basal to
these two species. two isolates (cBs 449.78 and cBs 112296)
warrant further attention.
Penicillium carneum
cBs 449.78,
an isolate from cheddar cheese, has a unique position in the
tubulin and calmodulin phylograms (Figs 1, 2). In addition, this
strain is morphologically slightly deviating from the majority of
examined
P. carneum
isolates. Isolate cBs 449.78 is cream-
brown in reverse on cya, more restricted colonies on creatine
agar and slightly slower growth rate at 30 °c. the other isolate
which warrants attention is
P. paneum
cBs 112296. this strain
has a unique β-tubulin, calmodulin and Its sequence. however,
extrolite analysis shows that this strain produces a typical array
of
P. paneum
extrolites. more strains of these two types should
be collected and examined to determine whether these strains
should be raised to species level.
taxonomy
Penicillium psychrosexualis
houbraken & samson,
sp. nov.
Penicillium
subgenus
sect.
ser.
coloniis in mea cum 0.5 % acore acetica crescentibus et item in agaro
mea, cys et yes celeriter crescentibus, et formatione cleistotheciorum
ad temperationem exiguam. roquefortino c haud producenti.
typus
: wooden crate in cold-store of apples
covered by growth of
Fubulorhizoctonia psychrophila
, 3 apr. 2008,
J. houbraken &
F. van der geijn
(cBs h-20501 holotype; cultures ex
type – cBs 128137 IBt 29551 dto 70g9).
diameter at 7 d (in mm): cya, 25 °c, 47–55; cya, 15
°c, 35–46; cya, 30 °c, 14–27; no growth on cya at 37 °c;
mea >60; yes >60; dg18, 40–50; ratio cyas : cya 1.2–
1.4; creatine agar 15–25, good growth and no or weak acid
strong sporulation on cya, velvety, slightly occose
in centre, dull green or dark dull green conidia, mycelium
inconspicuous, exudates absent, soluble pigment absent,
radial sulcate, reverse warm brown. good sporulation on
yes, conidia dull-green, soluble pigments absent, reverse
mustard-yellow, none sporulating edge 6–10 mm. good
sporulation on dg18, conidia dull-green, reverse pale.
colonies on mea dull-green towards pure-green, velvety,
on oa at 25 °c sparsely produced and not
visible due to the presence of a layer of conidia, formation
of cleistothecia induced and sporulation reduced at low
temperatures (9–15 °c, Fig. 5), cleistothecia white, soft and
sterile when young, maturing slowly and becoming pale
orange-brown after 3–4 mo of incubation, (50–)100–175 µm
ellipsoidal, 4–5 × 3–4 µm, with two distinct
equatorial ridges, often with additional secondary ridges, one
Fig. 3.
Bootstrap consensus tree from a maximum
likelihood analysis of Its sequences. the bootstrap values
from 1
000 replicates are shown at the nodes, the branches
in bold have a bootstrap support higher than 95 %. the
tree was rooted with
Penicillium egyptiacum
cBs 244.32
,.
N.+-1#l+.0'
N.+-1#l+.0'
N.+-1#l+.0'
N.+-1#l+.0'
N.+-1#l+.0'
Ne!.*#1)
+*-!!ee)'
.
Ne!.*#1)
Ne!.*#1)
Ne!.*#1)
N
N
.
N
.
N,!*#1)
N,!*#1)
+*-!!ee)l
N,!*#1)
N,!*#1)
+*-!!ee)&
N,!*#1)
N#%3,0'!e1)
ex in
Penicillium
series
roqueforti
Fig. 4.
Penicillium psychrosexualis
(cBs 128036 , ex wooden crate in cold-store of apples, the netherlands). (a–c) colonies grown at 25 °c for
7 d on (a) cya, (B) mea, and (c) yes; (d) cleistothecium; (e–F) ascospores; (g) conidiophores on dg18 with warted stipes; (h) conidiophore
oubraken
et al
on either side of the main ones, suggesting the presence
of four ridges when observed with light microscopy, valves
slightly roughened when viewed with sem.
terverticillate, slightly reduced conidiophores with smooth
walled stipes on mea and other agar media (Pda, Pca),
on dg18 robust conidiophores with warted stipes, 3–4 µm.
10–15 × 3–4 µm.
conidiogenous cells
(phialides)
ampulliform, 8–10 × 3–4 µm.
globose, smooth, 3.5–4
Penicillium psychrosexualis
produces the
extrolites andrastin a, mycophenolic, patulin, roquefortine c
and the uncharacterized extrolite tentatively named “fumu”.
P. psychrosexualis
produces the same odour
P. roqueforti
diagnostic features
: the growth on mea containing 0.5 %
acetic acid, the formation of cleistothecia at relatively low
temperatures for the genus (9 °c) and fast growth rate on mea,
cya and yes are diagnostic features of
P. psychrosexualis
an overview of characteristics of
P. psychrosexualis
in
comparison with other members of the series
is
shown in table 2.
similar species and taxonomy
: Phylogenetically
P.
belongs to series
. this species
shares a fast growth rate on agar media, the ability to grow
on mea supplemented with 0.5 % acetic acid and forms
conidiophores with warted stipes on dg18. this species
produces the extrolites andrastin a, mycophenolic, patulin and
roquefortine c and is chemically close to
P. carneum
. however,
P. carneum
also produces penitrem a, isofumigaclavine a
and cyclopaldic aicd, while
P. psychrosexualis
produces the
uncharacterised extrolite “fumu”.
Penicillium psychrosexualis
produces the same odour as
P. roqueforti
, and is thus very
different from the strong odour of
P. carneum
. another
difference between
P. psychrosexualis
and the other
members of the
series is the production of
cleistothecia by the former species. the growth rate on
cya at 30 °c is a diagnostic tool to differentiate between
P.
and
P. carneum
on one hand and
P. paneum
on the
other.
Penicillium psychrosexualis
has similar growth rates
at 30 °c as
P. roqueforti
and
P. carneum
. this observation is
concordant with the phylogeny, which also shows that these
three species are closely related and that
P. paneum
is basal
to these species. an overview of growth rates on cya at
nomenclature
: although the new species produces cleistothecia,
we decided to describe the taxon in
Penicillium
rather than
eupenicillium
in accordance with the recommendations of
hawksworth (2010) on best-practice in such instances in a
period when the rules of nomenclature that permit the dual
naming of pleomorphic fungi are under revision.
Fig. 5.
growth of
Penicillium psychrosexualis
cBs 128036 on oatmeal agar at various incubation temperatures. a–F: 9, 12, 18, 24, 27 and 33 °c.
ex in
Penicillium
series
roqueforti
Fig. 6.
overview of growth rates of the members of
on cya at various temperatures. row, top to bottom: 9, 12, 18,
24, 24 (reverse), 30 °c; columns, left to right:
P. roqueforti
dto 81d6,
P. paneum
dto 28g8,
P. carneum
dto 128a9 and
P. psychrosexualis
oubraken
et al
distribution and ecology
: this species has been isolated
from wood and apples (elstar) stored in a cold-store in the
netherlands. the conditions in the cold-store were 1.5–2.0
°c in combination with an oxygen level of 1.0–1.5 %, a
carbon dioxide level of 2.0 % and a relative humidity of 92–95
%. these conditions strongly inhibit the growth of most fungi;
however, a low temperature and microaerophilic conditions
do not prevent growth of members of the
series
the taxonomy of
Penicillium
series
roqueforti
has been
studied extensively in the past, mainly due to its role in cheese
manufacture. these studies were based on phenotypic
characters (thom 1906, 1910, raper & thom 1949, Pitt 1980,
samson
et al.
1977), extrolite patterns (Frisvad & Filtenborg
1989, Boysen
et al.
1996, samson & Frisvad 2004, smedsgaard
et al.
2004) and/or molecules (Boysen
et al.
1996, skouboe
et
al.
1999, samson
et al.
2004). this is the rst study using a
multigene approach to determine the relationship of species
belonging to the
roqueforti
series. all three studied loci are
suitable for species recognition. even the Its regions, normally
not recommended for species identication in
Penicillium
have enough variation in this series (skouboe
et al
. 1999,
houbraken
et al.
2010, samson
et al.
2010). Incongruence was
detected during the phylogenetic analysis of the calmodulin,
β-tubulin and Its
loci.
Penicillium psychrosexualis
was, with
high bootstrap support, basal to
P. carneum
and
P. roqueforti
in
the Its and calmodulin dataset, while
P. roqueforti
was basal
to
P. carneum
and
P. psychrosexualis
in the β-tubulin dataset.
the use of β-tubulin in taxonomy was debated by Peterson
(2008) and he excluded this locus in his study due to his doubt
about the homology of this locus between members of sections
in
aspergillus
. Furthermore, hubka & Kolařík (2010) showed
that the commonly used primers Bt2a and Bt2b could amplify
the β-tubulin paralog
tubc
in aspergilli. the interpretation of
paralogous genes with non-homologous function in the same
phylogenetic analysis posses a great risk and might create
incongruence within and between datasets (hubka & Kolařík
2010).
a limited number of penicillia are able to produce
cleistothecia and ascospores, and these species were
referred to the genus
eupenicillium
in a number of studies.
only a limited number of penicillia known to reproduce
sexually belong in subgenus
Penicillium
. samson & Frisvad
(2004) omitted these species in their monograph of this
subgenus, and they recommended that a multigene study
needs to be conducted to resolve the placement of these
teleomorphic penicillia within the subgenus
Penicillium
Peterson (2000) included various
eupenicillium
species in
his phylogenetic study of
Penicillium,
and showed that
e.
crustaceum
,
e. egyptiacum
,
e. baarnense
,
e. tularense,
and
hemicarpenteles paradoxus
belonged to group 6. this
group largely corresponds with the subgenus
Penicillium
as circumscribed by samson & Frisvad (2004). until now,
only homothallic species are described in this subgenus;
however, recent studies indicated that various species
belonging to this subgenus are heterothallic. hoff
et al.
(2008)
table 2.
overview of selected characters of members of
series
(after Frisvad & samson 2004, sumarah
et al
. 2005,
P. carneum
violet
roquefortine c, isofumigaclavine a&B,
penitrem a, andrastin a, (penicillic acid in
P. paneum
roquefortine c, marcfortin a, patulin,
andrastin a, citreoisocoumarin,
P. psychrosexualis
andrastin a, mycophenolic, patulin and
P. roqueforti
violet
roquefortine c, isofumigaclavine a&B,
Pr-toxin, andrastin a, citreoisocoumarin,
*often turning strawberry-red with age; with colour diffusing into the medium.
ex in
Penicillium
series
roqueforti
showed that
P. chrysogenum
is heterothallic, and analysis
of 12
P. chrysogenum
isolates showed an equal mating
type distribution, indicating the potential of this species to
reproduce sexually. In addition, eagle (2009) detected either
mat1-1-1 or mat1-2-1 gene fragments in isolates of
P.
camemberti
,
P. roqueforti
and
P. verrucosum
, also indicating
heterothallism. although various trials were undertaken to
inducing mating in
P. chrysogenum
(hoff
et al.
2008, eagle
2009, houbraken unpubl. data) none of them have been
successful. In addition, mating trials with
P. roqueforti
under
conditions known to induce sex in
aspergillus fumigatus
were unsuccessful and no cleistothecia were detected after
6 mo of incubation (eagle 2009). various growth factors
induce formation of cleistothecia, such as temperature,
light, nutrients and oxygen levels (han
et al.
2003). In this
study, we show that
P. psychrosexualis
, a species related
to
P. roqueforti
, produces cleistothecia abundantly at 9 °c.
the production of a sexual stage at low temperatures might
be more widespread in
Penicillium,
and mating experiments
with
P. roqueforti
at this temperature might result in a sexual
stage. Furthermore,
P. psychrosexualis
might be a good
model species for comparison purposes in sex induction
experiments or expression studies of genes required for
sex in
P. roqueforti
. there are also indications of a sexual
stage in
P. roqueforti
. sclerotia were observed in cultures
in
P. roqueforti
(samson
et al.
1977, shimada & Ichinoe
1998) and it was postulated that similar structures have
a dual function in the life-cycle in
aspergillus
sect.
Flavi
survival of adverse conditions is one of them; the other is
providing genetic variation in populations through sexual
reproduction as a cleistothecium (mcalpin & wicklow 2005,
horn
et al.
2009). the possible discovery of the sexual
stage in
P. roqueforti
could have consequences for the
stability of starter cultures and might have advantages in
strain improvement programs using conventional genetical
approaches.
the effect of temperature on sexual reproduction in species
belonging to the subgenus
is poorly studied. many
of these species are capable to grow at low temperatures and
are therefore common spoilage organisms in refrigerators.
mcculloch & cain (1928) found an effect of the temperature on
the formation of sclerotia of
Penicillium gladioli
. this species
produces blue-green conidial structures abundantly when
incubated at 14–15 °c, but produced comparatively a high
number of sclerotia and only a few conidial structures, when
incubated at 22 °c or higher. this observation is opposite to
the results reported here, if the assumption is followed that
sclerotia are immature cleistothecia. on the other hand, large
white sclerotia are occasionally seen in
P. italicum
, a species
related to
P. psychrosexualis
and also belonging to the
. these structures have been observed
in cultures incubated in darkness at 0 °c for 3 mo (raper &
thom 1949, samson & Frisvad 2004), also suggesting the
members of series
roqueforti
have a worldwide
distribution, mainly related to human environments, and
occur on various substrates.
Penicillium roqueforti
P.
and
P. carneum
occur on (preserved) food and
silage, and only
P. roqueforti
has been frequently isolated
as a saprobe in nature. reports of the occurrence of
P.
and
P. paneum
in nature are rare, and recently
P.
has been found in stone tombs in Japan (an
et al.
Penicillium psychrosexualis
is the second saprobic
species in this series and has also been isolated from wood.
several reports are made on the occurrence of
P. roqueforti
on woods such as sawn wood (logs), wood stakes in soil,
wood in sea, cut lumber,
quercus robur
, and very wet wood
in indoor environments (Picci 1966, Pitt 1980, land
et al.
1985, Kubátová 2000, seifert & Frisvad 2000, sumarah
we thank Frank van de geijn (agrotechnology & Food Innovations
Bv, wageningen, the netherlands) for collecting the wood and apples
samples. dae-hoo Kim is greatly acknowledged for the preparations
of the sem images of the ascospores, and we thank uwe Braun for
an K-d, Kiyuna t, Kigawa r, sano c, miura s, sygiyama J (2009)
the identity of
sp. 1, a major contaminant of the stone
chambers in the takamatsuzuka and Kitora tumuli in Japan, is
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of the
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since their discovery by colin orpin in the 1970s, the
anaerobic fungi, now members of the recently erected
, have aroused the curiosity
of mycologists, not only due to their distinctive physiology
but also because of their biotechnological potential, for more
efcient animal nutrition and also biomass conversion/biofuel
production. this contribution, based on a special Interest
group session held during Imc9, brought together mycologists
interested in anaerobic fungi to share recent discoveries and
to discuss how best to move forward research in this area. six
speakers kindly agreed to speak at the session, with a further
seven non-speakers in attendance. given the small numbers
of mycologists now engaged in research on anaerobic fungi,
this was a pleasing quorum, with expertise in genomic,
phylogenetic, morphological, physiological and ecological
aspects of the biology of these fungi being represented.
this synopsis of the session amounts to a mini-review of the
the session began with a presentation from scott Baker on
the status of two genome sequencing projects (
e2
sr2). the at richness of these genomes
(approaching 80 % in non-coding regions) has caused
signicant technical problems for genomic sequencing and
assembly. the Joint genome Initiative (JgI)
is working through
technical issues with assembling the genome, but does plan
to release the sequence in the near future. In contrast, the
expressed sequence tag (est)
library sequencing project
did not encounter any technical issues and will be made
available concurrent with the eventual release of the genome
sequence. until then, contact scott for information on
accessing ests (scott.baker@pnl.gov). much of the interest
in these fungi relates to the genes/enzymes important for
biorening and biofuel production, notably xylose isomerases
Kate Fliegerova, who also presented a poster (4.015) at
the main Imc9 congress, further explored the biotechnological
, audra liggenstoffer
, Kerstin voigt
IBers, aberystwyth university, aberystwyth sy23 3dd, wales; corresponding author e-mail: gwg@aber.ac.uk
Battelle Boulevard, P.o. Box 999, msIn P8-60 richland, wa 99352 usa
Institute of animal Physiology and genetics, academy of sciences of czech republic, videnska 1083, Prague 4 - Krc, 142 20 czech republic
, stillwater, oK, usa
centre for eukaryotic evolutionary microbiology, Biosciences, college of life & environmental sciences, university of exeter, stocker road,
Friedrich schiller university Jena, Institute of microbiology, department of microbiology and molecular Biology, Jena microbial research
school of Biology, newcastle university, newcastle upon tyne ne1 7ru, uK
abstract:
this contribution is based on the six oral presentations given at the special Interest group
session on anaerobic fungi held during Imc9. these fungi, recently elevated to the status of a separate
phylum (
neocallimastigomycota
), distinct from the chytrid fungi, possess several unique traits that make
their study both fascinating yet challenging to mycologists. there are several genome sequencing programs
underway in the us but these are hampered by the highly at-rich genomes. next-generation sequencing
has also allowed more detailed investigation of the ecology and diversity of these fungi, and it is apparent
that several new taxa beyond the six genera already named exist within the digestive tracts of mammalian
herbivores, with others potentially inhabiting other anaerobic niches. By increased collaboration between
the various labs studying these fungi, it is hoped to develop a stable taxonomic backbone for these fungi
article info:
submitted: 27 october 2010; accepted: 20 november 2010; Published: 23 november 2010.
Key words:
Ima Fu
gus
volu
me
1
o 2: 181–185
rifth
et al
potential of these fungi. some of the cellulases of anaerobic
fungi originated via horizontal gene transfer from bacteria,
so these are the only fungi known to possess cellulosomes,
cell-wall associated multienzyme complexes (garcia-vallve
et al.
2000, steenbakkers
et al.
2001). combined with
their anaerobic metabolism and ability grow at elevated
temperatures (39 ºc), they have great biotechnological
potential. In Prague, Kate and her colleagues have explored
the use of anaerobic fungi to improve the hydrolytic phase of
biogas production. they have also investigated which fungi
are present in the cow manure used to prime the biogas
fermentations (Fliegerova
et al
. 2010), nding members of
the genus
, the sixth and most recently discovered
group of anaerobic fungi (ozkose
et al
. 2001) to be dominant,
with the ‘most famous’ (and type) genus
comprising only a small proportion of the population. this
imbalance is also reected in the literature, possibly a result
of the widespread use of wheat straw for the culture-based
the application of culture-independent approaches to
assessing the diversity of anaerobic fungi was the subject of
audra liggenstoffer’s presentation. her Phd project at the
oklahoma state university used barcoded 454 sequencing
to determine the fungal symbionts present in the faeces of 30
species of larger herbivores, many from oklahoma city zoo.
her ndings have recently been published (liggenstoffer
et al
. 2010)
and demonstrated not only conrmation of the
occurrence of anaerobic fungi in a non-mammal host (green
iguana) but also the existence of eight novel groups of
fungi, with these new taxa (likely to represent new genera)
comprising almost 40 % of the >250,000 Its sequences
obtained. whilst it can be difcult to be certain that zoo animals
have not acquired new symbionts whilst in captivity, some of
these novel groups (ng) did show some host specicity, for
example with ng6 comprising nearly all the fungi in kudu and
with such a high rate of taxon discovery, the
, the newest of the fungal phyla
Fig. 1.
network graph highlighting shared otus between different anaerobic fungal communities in different animal hosts. the graph is colour-
coded by animal host phylogeny (family). circular nodes indicate animal data sets, whereas smaller square, grey nodes represent individual
otus. data sets with a higher proportion of shared otus are pulled to the middle, whereas data sets with a high proportion of unique otus
remain on the periphery. the distance between any two data sets is a function of the number of shared otus between the two. Figure supplied
by audra liggenstoffer.
anaerobic fungi:
neocallimastigomycota
et al
. 2007) clearly has more taxonomic gems
awaiting discovery, notably in habitats beyond the digestive
tracts of vertebrates. anaerobic fungal sequences do appear
in environmental clone libraries (lockhart
et al
. 2006) but this
attests more to the resilience of their resting spores (ozkose
2001) than to their active metabolism in these habitats.
however, it is already clear that a robust taxonomic scheme
based on gene sequence data rather than the meagre
morphological traits is needed. Kerstin voigt specialises in the
phylogenetics of the lower fungi and questions the acceptability
of the phylum
(ebersberger
. 2010). In collaboration with Kate Fliegerova and Ingo
ebersberger from vienna, Kerstin has taken a phylogenomic
approach (concatenated supermatrices of data) to generate
more robust phylogenies. a key element of this approach is
the use of orthologous genes for comparisons, requiring rst
the identication of the original member of any gene family
within an organism, prior to any interspecic comparisons.
application of this more robust approach for the anaerobic
fungi requires sequence data from genes other than the
rrna locus, however, Kerstin’s initial analyses, like audra’s
454 data, revealed the presence of four novel genera (Fig.
2). It was also clear that some genBank accessions are
mis-labelled, highlighting the difculty in morphological
If there is one feature of the
that
intrigues microbiologists more generally, it is their obligately
anaerobic metabolism. Prior to their
“ofcial” discovery by colin
Fig. 2.
Phylogenetic tree based on a maximum likelihood analysis using raxml v. 7.2.6 (stamatakis 2006) with the aligned Its1-5.8sIts2
rifth
et al
orpin (1974), these organism had been reported by several
rumen microbiologists, and even named by liebetanz (1910)
as the agellate protozoan
. during the 1960's,
hungate and Prins had also noted these organisms but had
dismissed them as contaminants. thus the dogma that there
are no anaerobic fungi was not easily overturned. despite
the near-absence of any useful fossil record, increasingly
accurate molecular clock approaches consistently show
that the fungi diverged from the more primitive metazoans
(animals) some 1000 million years ago. at that time, between
the two great oxygenation events (at
2400 and 600
myr), primitive eukaryotes (including the earliest fungi) were
exposed to low atmospheric oxygen levels (<10 %) and many
potential niches (e.g. the sea) were highly anoxic (euxinic)
et al
. 2010). mark van der giezen’s research has
focused on the metabolism of anaerobic eukaryotes (van der
et al
. 2005) and in particular how the mitochondrion,
thought to have been acquired endosymbiotically to alleviate
oxidative stress, evolved into the hydrogenosome, converting
malate and pyruvate to hydrogen, co
and acetate. mark
described the several lines of evidence that strongly suggest
a mitochondrial origin also for the hydrogenosomes of the
some mycologists interested in lower fungi attended the
concurrent sIg session on
evolution and biodiversity of basal
lineages of fungi
organised by satoshi sekimoto and tim
James. we were, however, fortunate that gordon Beakes
had agreed to it
between sessions and to end our session
with an overview of the
neocallimastigomycota
within the
broader panoply of agellate fungi. though he is foremost
a microscopist, gordon has made a valuable contribution
to work on anaerobic fungi by providing hitherto the only
quantitative assessment of the signicance of anaerobic
fungi to rumen metabolism. this study estimated that the
fungi comprised some 20 % of the microbial biomass of
sheep fed hay and pelleted lucerne diet (rezaeian
et al
2004). surprisingly many rumen microbiologists still do not
consider the fungi to be a signicant component of the rumen
microbiota. this belief is fostered partly through ignorance
(if you don’t look you don’t see- not dissimilar to the view
of mycorrhizas by many plant physiologists) but also by the
bias towards investigation of livestock being fed low bre/
high concentrate diets. with an enlarging human population
and increasing demand for animal products, it is likely that
animal production will have to become more reliant on high
bre feedstocks, with fungi being of greater importance in
a common theme from several speakers was the need for
funding to catalyse research on anaerobic fungi. In addition
to the biotechnological interest mentioned by scott and
Kate, it is important to explore the possibilities of funding in
the area of rumen metabolism, as noted above. In addition
to exploring the role of the fungi in bre digestion, there is
also the interaction between the fungi and the methanogenic
of the rumen, since emission of methane from
livestock production is now recognised to be a major source
discussions at the end of the meeting and for the duration
of Imc9 also addressed how we might promote future
collaboration, for instance by establishment of a repository
of important isolates. since they are difcult to culture and
require specialised equipment to exclude oxygen, it is unlikely
that any of the major culture collections will take on this
daunting task. however, it is hoped that a repository for frozen
cultures may be found to ensure that representative cultures
of the major taxa are made freely available. Furthermore, we
agreed to collaborate by sharing of molecular data to work
towards a stable taxonomy for these fungi, including the
physiological, genetic and morphological classication of the
as organiser of this special Interest group, gwg would like to
express his heartfelt thanks to all the participants, especially the
speakers and hopes that our discussions both during and after the
sIg will lead to a resurgence in work on these fungi. gwg is also
dahl tw, hammarlund eu, anbar ad, Bond dPg, gill Bc,
et al.
(2010)
devonian rise in atmospheric oxygen correlated to the radiations
of terrestrial plants and large predatory sh.
Proceedings of the
national academy of sciences, usa
: 17911–17915.
ebersberger I, gube m, strauss s, Kupczok a, eckart m,
et al.
(2010) a stable backbone for the fungi.
nature Proceedings
).
Fliegerova K, mrazek J, hoffmann K, zabranska J, voigt K (2010)
diversity of anaerobic fungi within cow manure determined by
garcia-vallve s, romeu a, Palau J (2000) horizontal gene transfer
of glycosyl hydrolases of the rumen fungi.
molecular Biology and
giezen m van der (2009) hydrogenosomes and mitosomes:
conservation and evolution of functions.
Journal of eukaryotic
giezen m van der, rechinger KB, svendsen I, durand r, hirt
rP,
et al.
(1997) a mitochondrial-like targeting signal on the
hydrogenosomal malic enzyme from the anaerobic fungus
neocallimastix frontalis
: support for the hypothesis that
hydrogenosomes are modied mitochondria.
: 11–21.
giezen m van der, tovar J, clark cg (2005) mitochondrion-derived
organelles in protists and fungi.
International review of cytology
grifth gw, ozkose e, theodorou mK, davies dr (2009) carbon
source affects isolation efciency of anaerobic rumen fungi.
hibbett ds, Binder m, Bischoff JF, Blackwell m, cannon PF,
et al.
(2007) a higher-level phylogenetic classication of the fungi.
111
anaerobic fungi:
neocallimastigomycota
liebetanz e (1910) die parasitischen Protozoen des
liggenstoffer as, youssef nh, couger mB, elshahed ms (2010)
Phylogenetic diversity and community structure of anaerobic
gut fungi (phylum
) in ruminant and non-
lockhart rJ, dyke mI van, Beadle Ir, humphreys P, mccarthy
aJ (2006) molecular biological detection of anaerobic gut
fungi (
neocallimastigales
) from landll sites.
applied and
orpin cg (1974) rumen agellates
callimastix frontalis
- zoospores of phycomycete fungi.
Journal of applied
ozkose e (2001)
morphology and molecular ecology of anaerobic
. Phd thesis, university of wales, aberyswyth.
ozkose e, thomas BJ, davies dr, grifth gw, theodorou mK
cyllamyces aberensis
gen.nov sp.nov., a new anaerobic
gut fungus with branched sporangiophores isolated from cattle.
rezaeian m, Beakes gw, Parker ds (2004) distribution and
estimation of anaerobic zoosporic fungi along the digestive tracts
stamatakis a (2006) raxml-vI-hPc: maximum likelihood-based
phylogenetic analyses with thousands of taxa and mixed models.
steenbakkers PJm, li Xl, Ximenes ea, arts Jg, chen hz,
(2001) noncatalytic docking domains of cellulosomes of
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aspergillus sparsus
species group (
section
; gams
et al.
1985) was established by raper & Fennell
(1965) to accommodate four species isolated from tropical or
subtropical soils. species assigned to this group have large
globose conidial heads, which irregularly split with age, with
colours ranging from light grey to olive-buff. samson (1979)
suggested that
a. gorakhpurensis
should also be placed
to this section. however, phylogenetic analysis of parts of
the ribosomal rna gene cluster indicated that this species
belongs to
section
(Peterson 1995, 2000).
according to the recent data of Peterson
et al.
(2008) and
Peterson (2008), the monophyletic section
belongs
to subgenus
, and in addition to
a. sparsus, a.
biplanus, a. diversus
and
a. funiculosus,
originally placed to
this section by raper & Fennell (1965), it also includes
and
a. conjunctus
previously assigned to section
a. anthodesmis
which was previously placed in the
In this study, we examined available isolates of the species
proposed to belong to section
to clarify the taxonomic
status of this section. the methods used include sequence
analysis of the Its region (including internal transcribed
spacer regions 1 and 2, and the 5.8 s rrna gene of the
rrna gene cluster), and parts of the
-tubulin and calmodulin
genes, analysis of macro- and micromorphological characters
ate
the strains examined are listed in table 1. the strains were
grown for 7 d as three-point inoculations on czapek agar,
czapek yeast autolysate agar (cya), malt extract agar
(mea), and oatmeal agar (oa) at 25
c and 37
c (medium
the cultures were analysed according to the hPlc-diode
array detection method of Frisvad & thrane (1987, 1993) as
modied by smedsgaard (1997). the isolates were analysed
on cya and yes agar using three agar plugs (smedsgaard
1997). the secondary metabolite production was conrmed
by identical uv spectra with those of standards and by
comparison to retention indices and retention times for pure
compound standards (Frisvad & thrane 1993, rahbaek
János varga
and robert a. samson
cBs-Knaw Fungal Biodiversity centre, uppsalalaan 8, nl-3584 ct utrecht, the netherlands
department of microbiology, Faculty of science and Informatics, university of szeged, h-6726 szeged, Közép fasor 52, hungary; corresponding
centre for microbial Biotechnology, department of systems Biology, Building 221, technical university of denmark, dK-2800 Kgs. lyngby,
abstract:
section
includes species which have large globose conidial heads with colours
ranging from light grey to olive-buff. In this study, we examined isolates of species tentatively assigned to section
using a polyphasic approach. the characters examined include sequence analysis of partial
calmodulin and Its sequences of the isolates, morphological and physiological tests, and examination of the
extrolite proles. our data indicate that the revised section
includes 10 species:
a. anthodesmis, a.
biplanus, a. conjunctus,
a. diversus,
a. funiculosus,
a. implicatus, a. panamensis,
a. quitensis, a. sparsus,
and the new taxon
a. haitiensis.
the recently described
a. quitensis
and
a. ecuadorensis
are synonyms of
a. amazonicus
based on both molecular and physiological data. the white-spored species
a. implicatus
has
also been found to belong to this section.
aspergillus haitiensis
sp. nov. is characterised by whitish colonies
becoming reddish brown due to the production of conidial heads, and dark coloured smooth stipes. the taxon
article info:
submitted: 4 november 2010; accepted: 22 november 2010; Published: 26 november 2010.
Key words:
Ima Fu
gus
volu
me
1
o 2: 187–195
arga
et al
the cultures used for the molecular studies were grown on
malt peptone (mP) broth using 1 % (w/v) of malt extract (oxoid)
and 0.1 % (w/v) bacto peptone (difco), 2 ml of medium in 15
ml tubes. the cultures were incubated at 25 °c for 7 d. dna
was extracted from the cells using the masterpure
yeast
dna purication kit (epicentre Biotechnologies) according to
the instructions of the manufacturer. Fragments containing
the Its region were amplied using primers Its1 and Its4 as
described previously (white
et al.
1990). amplication of part
of the
-tubulin gene was performed using the primers Bt2a
and Bt2b (glass & donaldson 1995). amplications of the
partial calmodulin gene were set up as described previously
et al.
2005). sequence analysis was performed with
the Big dye terminator cycle sequencing ready reaction
Kit for both strands, and the sequences were aligned with
the mt navigator software (applied Biosystems). all the
sequencing reactions were puried by gel ltration through
sephadex g-50 (amersham Pharmacia Biotech, Piscataway,
nJ) equilibrated in double-distilled water and analyzed on
the aBI PrIsm 310 genetic analyzer (applied Biosystems).
the unique Its,
-tubulin, and calmodulin sequences were
deposited at the genBank nucleotide sequence database
under accession numbers FJ491645–FJ491675, and
the sequence data was optimised using the software package
seqman from dnastar Inc. sequence alignments were
performed by mega v. 4.0 (tamura
et al.
2007) and improved
manually. For parsimony analysis, the PauP v. 4.0 software
was used (swofford 2002). alignment gaps were treated as a
fth character state and all characters were unordered and of
equal weight. maximum parsimony analysis was performed
for all data sets using the heuristic search option with 100
random taxa additions and tree bisection and reconstruction
(tBr) as the branch-swapping algorithm. Branches of zero
length were collapsed and all multiple, equally parsimonious
trees were saved. the robustness of the trees obtained
was evaluated by 1000 bootstrap replications (hillis & Bull
1993). an
a. ochraceoroseus
isolate belonging to section
of subgenus
(Peterson
et al.
2008)
was used as outgroup in these experiments. the alignments
were deposited in treeBase (
) under accession number s11028.
we examined the genetic relatedness of section
isolates using sequence analysis of the Its region of the
ribosomal rna gene cluster, and parts of the calmodulin
-tubulin genes. the calmodulin data set included 566
characters, with 288 parsimony informative characters.
one of the 56 mP trees is shown in Fig. 1 (tree length: 741,
consistency index: 0.7247, retention index: 0.8903). during
analysis of a part of the
-tubulin gene, 494 characters were
analysed, among which 196 were found to be parsimony
informative. the single mP tree based on partial
genes sequences is shown in Fig. 2 (length: 507 steps,
consistency index: 0.7179, retention index: 0.8938). the
Its data set included 559 characters with 58 parsimony
informative characters. one of the 702 mP trees is presented
in Fig. 3 (tree length: 180, consistency index: 0.8056,
Phylogenetic analysis of
-tubulin, calmodulin and Its
sequence data indicated that
aspergillus
section
sparsi
includes 10 species.
aspergillus biplanus
and
a. diversus
are closely related to each other on all trees, while another
table 1.
isolates examined in this study.
nrrl 22884
nrrl 5071
soil, tilaran, costa rica
cBs 469.65 nrrl 5073
soil, tilaran, costa rica
nrrl 5072
soil, tilaran, costa rica
nrrl 5080
Forest soil, Palmar, Province of Punteras, costa rica
nrrl 5074
cBs 116.56
nrrl 4744
nrrl 4569
cBs 468.91 nrrl 4568
nrrl 1785
nrrl 1786
nrrl 1933
nrrl 1937
soil, san antonio, texas, usa
Polyphasic taxonomy of
aspergillus
section
sparsi
N6!'-) +30
e##!-(/*
N6!'-) +30
e##!-(/)
N6!'-) +30
e##!-(/+
N6!'-) +30
N6!'-) +30
N6#'4l/030
e##!-(/,
N6#'4l/030
N6- + *l+0'0
e##!)/0-
N6- + *l+0'0
N6e,+(3+e130
e##!-(0(
N6e,+(3+e130
N60- /030
e##!)1++
N60- /030
N6 +1&,#l0*'0
N6& '2l+0'0
e##!,-.0
N6& '2l+0'0
N6& '2l+0'0
e##!,-.1
N6& '2l+0'0
N60- /030
e##!)1+/
N6'*-)'e 130
N6%3+'e3),030
e##!,/,,
N6,e&/ el,/,0l30
N6 * 5,+'e30
N6le3 #,/l+0'0
N6.3'1l+0'0
N6!'-) +30
e##!-(/+
N6!'-) +30
N6!'-) +30
e##!-(/)
N6!'-) +30
e##!-(/*
N6!'-) +30
N6#'4l/030
e##!-(/,
N6#'4l/030
N6- + *l+0'0
e##!)/0-
N6- + *l+0'0
N6e,+(3+e130
N60- /030
e##!)1++
N60- /030
N60- /030
e##!)1+/
N6 +1&,#l0*'0
N6& '2l+0'0
e##!,-.0
N6& '2l+0'0
N6& '2l+0'0
e##!,-.1
N6& '2l+0'0
N6'*-)'e 130
N6%3+'e3),030
e##!,/,,
N6,e&/ el,/,0l30
N6- + *l+0'0
e##!)/0.
N6 * 5,+'e30
N6le3 #,/l+0'0
N6.3'1l+0'0
Fig. 1.
one of the mP trees obtained based on
phylogenetic analysis of calmodulin sequence data of
sparsi.
numbers above branches
are bootstrap values. only values above 70 % are
Fig. 2.
the single mP tree obtained based on
phylogenetic analysis of
-tubulin sequence data of
sparsi.
numbers above branches
are bootstrap values. only values above 70 % are
arga
et al
clade includes
a. panamensis, a. anthodesmis,
a. conjunctus,
and the recently described
a. amazonicus
,
a. quitensis
and
a. ecuadorensis
isolates on the trees based on
-tubulin and
Its sequence data (Figs 2, 3; mares
et al.
2008). although
mares
et al.
(2008) found that these three isolates have
identical Its sequences, they were suggested to represent
distinct species based on morphological data (length of talks,
diameter of vesicles, morphology of conidia and number of
phialides), and were placed in
aspergillus
section
wentii
however, these three isolates could not be distinguished from
each other based on molecular, morphological or extrolite data
in our study, and clearly belong to section
sparsi
(Figs 1–4).
aspergillus amazonicus
is chosen as the correct name for the
taxon and
a. quitensis
and
a. ecuadorensis
are considered
synonyms.
aspergillus implicatus
, a white-spored species
originally assigned to
aspergillus
section
candidi
(maggi &
Persiani 1994), also belongs to this section. this species was
described to produce conidiophores surrounded by sterile
hyphae, not yet seen in any other species of the
aspergillus
genus. unfortunately the ex-type culture showed only poor
sporulation and only a few conidiophores with sterile outgrowth
could be observed (Fig. 5).
Phylogenetic analysis of sequence data indicated that
the four examined
a. sparsus
isolates fall into two closely
related clades. the three phylogenies were concordant,
with no conict between the topologies of the gene trees,
in accordance with the phylogenetic species recognition
concept detailed by taylor
et al.
(2000). the ex-type strain
a. sparsus
(cBs 139.61
) together with an isolate from
texas, usa form one clade, while two isolates came from soil
from haiti form another clade on all trees (Figs 1–3). Both
of the latter isolates were found by raper & Fennell (1965)
to differ from the ex-type strain of
a. sparsus
in producing
more restrictedly growing colonies in shades of reddish
brown on mea plates, while one of the isolates (cBs 464.91
nrrl 4569) also produced “small fragmentary sporulating
structures adjacent to the agar surface that bear conidia
similar to those of normal heads” (raper & Fennell 1965).
regarding the value of the different loci for species
delimitation in section
, all species could be
distinguished using either Its,
-tubulin or calmodulin
sequence data. however, the resolving power was much
higher for the protein coding genes than for the Its region.
the situation is more difcult in other sections of aspergilli,
including for example sections
(samson
et al.
2007),
(varga
et al.
2007), and
(J. varga, unpubl.
observ.), where the Its region cannot be used reliably to
among the species assigned to
aspergillus
section
sparsi,
a. panamensis
produces cyclogregatin and gregatins (also
called graminins or aspertetronins; anke
et al.
1980a, b,
N6!'-) +30
#lle4/60
N6!'-) +30
#lle4/61
N6!'-) +30
#lle4/62
N6!'-) +30
N6!'-) +30
N6#'4l/030
#lle4/63
N6#'4l/030
N6- + *l+0'0
N6- + *l+0'0
#lle0675
N6e,+(3+e130
N60- /030
#lle0822
N60- /030
N6 +1&,#l0*'0
N6 +1&,#l0*'0
#lle11773
N6& '2l+0'0
#lle3457
N6& '2l+0'0
N6& '2l+0'0
#lle3458
N6& '2l+0'0
N60- /030
#lle0826
N6'*-)'e 130
N6%3+'e3),030
#lle3633
N6,e&/ el,/,0l30
N6 * 5,+'e30
N6le3 #,/l+0'0
N6.3'1l+0'0
Fig. 3.
one of the mP trees obtained based on
phylogenetic analysis of Its sequence data
sparsi.
numbers above
branches are bootstrap values. only values
Polyphasic taxonomy of
aspergillus
section
sparsi
Fig. 4.
aspergillus amazonicus
(cBs 124228).
colonies of 7 d grown at 25 °c; a on cya, B on mea, c on crea.
conidiophores and
arga
et al
1988), while
a.
funiculosus
has been found to produce
ethericin a (also called violaceol I or aspermutarubrol), and
ethericin B (or funicin; König
et al.
1978, 1980, nakamura
et
al.
1983) (table 2). ethericin a was rst isolated and called
aspermutarubrol from
a. sydowii
, causing the red colouration
of the medium, as this unstable compound will turn into a
red dye by oxidation (shibata
et al.
1978). the ethericins (or
violaceols) are also produced by
a. versicolor
and several
emericella
species (Fremlin
et al.
2009). gregatins are also
produced by
a. anthodesmis
and one of the
a. haitiensis
isolates (table 2). siderin is related to kotanins produced by
some black aspergilli and
a. clavatus
(samson
et al.
2007,
varga
et al.
2007), and is also produced by
a.
panamensis,
a. anthodesmis, a. conjunctus
and by an
a. haitiensis
isolate
(nrrl 4569). auraglaucin production is shared by
a. biplanus
a. conjunctus
and
a. diversus
, and is also produced by some
eurotium
species (gould & raistrick 1934, quilico
et al.
1949).
aspergillus implicatus
(Fig. 5) has been found to produce a
versicolorin derivative. the two
a. haitiensis
isolates produced
quite distinct extrolite proles, but shared the production of
several unknown compounds including those tentatively
named tidmyco1-3. several of the other extrolites produced by
species assigned to
aspergillus
section
sparsi
have also been
detected in other species assigned to sections
nidulantes
,
usti
and
versicolores
, justifying the assignment of section
sparsi
to
aspergillus
subgenus
nidulantes
(Peterson
et al.
2008).
table 2.
. the structures of the extrolites in brackets have not yet been elucidated.
an aszonalenin, (dob-indol, fot, vurs1, vurs2, stan)
gregatins, siderin (alk-769gl; amF1, amF2, amF3, antw, kota, met k, tidmyco1, tidmyco2, senmyco1, senmyco2,
auroglaucin, (BlØdo, cur-678, KonI, oKsI-1121, raI-701, raI-843, sKot, vern-652, vern-655, vern-
661, vern-673, vers-965, vers-979, vers-1049, vers-1107)
auroglaucin, siderin?, (alk-1538, alk-1756, blæam, conJ1, conJ2, conJ3, duts, InsuX,Jon1, Jon2, Jon3,
Jon4, kola, kola2, svIF1, svIF2, ut, verruc1, verruc2, vers-1049, vers-1107), a falconensin (? by
a. conjunctus
auroglaucin, mycophenolic acid?, (alka-704, conJ1, kola2, oKsI-1, oKsI-2, vers-965, vers-979, vers-1049,
vers-1107; oKsI-3, oKsI-4, oKsI-5, oKsI-6 by nrrl 5075)
arugosin e, ethericin a, funicin ethericin B, terrein?, (aq-798, aq-1456, bianthron-1396, derh, drI, emon,
hæms, nol, raI-921, raI-972, storå, sultI-1, sultI-2, vers-818, vers-856)
nrrl 4568
(atrov, gyla, nIdu, tidmyco1, tidmyco2, tidmyco3, spar1, spar2, spar3)
nrrl 4569
gregatins, siderin, (amF1, amF2, amF3, senmyco1, senmyco2, senmyco3, tidmyco1, tidmyco2, tidmyco3)
gregatins, siderin, (aq-1456, otto),
Polyphasic taxonomy of
aspergillus
section
sparsi
Fig. 6.
aspergillus haitiensis
(cBs 464.91).
colonies of 7 d grown at 25 °c; a on cya, B on mea, c on crea.
conidiophores and
arga
et al
taxonomy
aspergillus haitiensis
varga, Frisvad & samson,
nov.
sect.
similes, sed coloniis porphyreis et
stipitibus fuscatis, laevibus distinguitur.
typus
: isolated from soil under sage and cactus,
w.
(as 113a) (cBs h-20503 -- holotypus, cultures ex-
holotype cBs 464.91 nrrl 4569).
on mea 50–60 mm, on cya 30–35 mm, after 14
d at 25
c, moderate growth on mea after 7 d at 37
conidial heads produced sparsely on cya, colony colour rst
white then reddish brown, colony texture occose, reverse
creamish to light brown. conidial heads radiate; stipes
5–9 µm, thick-walled, dark brown in colour; vesicles 10–25
µm wide, biseriate; metulae covering the whole vesicle,
measuring 2.5–4 × 5–7 µm.
conidiogenous cells
(phialides)
2–2.5 × 7–8 µm.
globose to ellipsoidal 4–5.6 × 5–6
µm, smooth. Fragmentary sporulating structures in addition
additional isolate studied
: Port de Paix, from desert
w. scott
(as 103b) (cBs 468.91 nrrl 4568).
diagnostic features
: thin whitish colonies turning to reddish
brown colour on cya, brown-coloured smooth stipes,
and production of unknown extrolites tentatively called
tidmyco1-3.
we are grateful to tineke van doorn who helped with the
morphological data, uwe Braun with the latin diagnosis, and our
anke h, casser I, schrage m, steglich w (1988) cyclogregatin,
a new metabolite from
aspergillus panamensis
Journal of
anke h, schwab h, achenbach h (1980a) tetronic acid derivatives
anke h, schwab h, achenbach h (1980b) tetronic acid
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aspergillus panamensis
. Production, isolation,
characterization and biological activity.
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subgenus
nidulantes
is one of the largest
subgenera of the genus
, including about 80
species (Peterson 2008, Peterson
et al.
2008). several
species of this subgenus have a teleomorph assigned to
(Pitt
et al.
2000, samson 2000, Frisvad & samson
2004). species of subgenus
are important as
opportunistic human pathogens (verweij
et al.
2008, varga
et al.
2008), as producers of various secondary metabolites
which are useful for the pharmaceutical industry (e.g.
penicillin, echinocandins, ophiobolins), and mycotoxins
which are harmful to animals and humans (e.g. aatoxins,
sterigmatocystin; Frisvad
et al.
2004, 2005, Frisvad &
during surveys of
isolates from soil samples
from subtropical regions, two interesting isolates were
recovered which did not match any known species of the
genus. we used the polyphasic approach, including sequence
analysis of parts of the
-tubulin and calmodulin genes and the
Its nrdna region, macro- and micromorphological analyses,
and examination of the extrolite proles of the isolates to
differentiate the new species
aspergillus karnatakaensis
sp.
nov. we also analysed strains of species which appeared
to be closely related to the new species for the production
of extrolites and found sterigmatocystin in all species
with a teleomorphic state studied and also in
mate
an
the strains used in this study are listed in table 1.
For macromorphological observations, czapek yeast
autolysate (cya), malt extract autolysate (mea) agar, yeast
extract sucrose agar (yes), creatine sucrose agar (crea),
and oatmeal agar (oa) were used (samson
et al.
2010). the
isolates were inoculated at three points on each plate of each
medium and incubated at 25 °c and 37 °c in the dark for 7
d. For micromorphological observations, microscopic mounts
were made in lactic acid from mea and oa colonies and a
drop of alcohol was added to remove air bubbles and excess
the isolates were grown on cya and yes at 25 °c for 7 d.
extrolites were extracted after incubation. Five 6 mm plugs
sect. nov., a new section of the genus for
sp. nov. and some allied fungi
János varga
and robert a. samson
cBs-Knaw Fungal Biodiversity centre, uppsalalaan 8, nl-3584 ct utrecht, the netherlands
department of microbiology, Faculty of science and Informatics, university of szeged, Közép fasor 52, h-6726 szeged, hungary;
department of systems Biology, Building 221, søltofts Plads, technical university of denmark, dK-2800 Kgs. lyngby, denmark
abstract:
the new species
sp. nov. is described and illustrated. all three
isolates of this species were isolated from Indian soil; two from soil under a coconut palm in a coffee
plantation in Karnataka, and one from soil in the machrar river bed in Bansa district. this species is
closely related to, but clearly distinct, from
a. aeneus
based on
-tubulin or calmodulin sequence data.
sequences of the Its region of these two species are identical.
aspergillus karnatakaensis
produced
terrein, gregatins, asteltoxin, karnatakafurans a and B and the unknown metabolite, provisionally
named nIdu.
aspergillus karnatakaensis
belongs to a well-dened clade within
subgenus
together with eight other species including
a. aeneus
a. crustosus, a. eburneocremeus, a.
and the teleomorph producing-species
emericella bicolor
e. discophora, e. spectabilis,
e. foeniculicola.
this clade is placed in a new section,
sect.
sect. nov. all
article info:
submitted: 8 november 2010; accepted: 22 november 2010; Published: 26 november 2010.
Key words:
Ima Fu
gus
volu
me
1
o 2: 197–205
arga
et al
of each agar medium were taken and pooled together into
the same vial for extraction with 0.75 ml of a mixture of ethyl
acetate/dichloromethane/methanol (3:2:1) (v/v/v) with 1 %
(v/v) formic acid. the extracts were ltered and analyzed by
hPlc using alkylphenone retention indices and diode array
uv-vIs detection as described by Frisvad & thrane (1987,
1993), with minor modications as described by smedsgaard
(1997). the column used was a 50 × 2 mm luna c-18 (II)
reversed phase column (Phenomenex, ca, usa) tted with
the cultures used for the molecular studies were grown on
malt peptone (mP) broth using 1 % (w/v) of malt extract (Brix
10) and 0.1 % (w/v) bacto peptone (difco), 2 ml of medium
in 15 ml tubes. the cultures were incubated at 25 °c for 7
d. dna was extracted from the cells using the masterpure
yeast dna purication kit (epicentre Biotechnology.)
according to the instructions of the manufacturer. the Its
region and parts of the
-tubulin and calmodulin genes were
amplied and sequenced as described previously (varga
the sequence data was optimised using the software package
seqman from dnastar Inc. sequence alignments were
performed by mega v. 4.0 (tamura
et al.
2007) and improved
manually. For parsimony analysis, PauP v. 4.0b10 software
was used (swofford 2003). alignment gaps were treated as a
fth character state and all characters were unordered and of
equal weight. maximum parsimony analysis was performed
for all data sets individually using the heuristic search option
with 100 random taxa additions and tree bisection and
reconstruction (tBr) as the branch-swapping algorithm.
Branches of zero length were collapsed and all multiple,
equally parsimonious trees were saved. the robustness
of the trees obtained was evaluated by 1000 bootstrap
replications (hillis & Bull 1993).
eurotium heterothallica
was
used as outgroup in these analyses (houbraken
et al.
2007).
the alignments were deposited in treeBase (
) under accession number
s11027.
an
of the aligned
-tubulin sequences, a portion with 438
positions, including 107 parsimony informative characters,
was selected for the analysis; mP analysis of the sequence
data resulted in two similar, equally most parsimonious
trees (tree length 289 steps, consistency index 0.7855,
retention index 0.7919), one of which is shown in Fig. 1. the
calmodulin data set consisted of 492 characters, including 188
table 1.
spp. examined in this study.
ubstratum, country, location
nrrl 4769
t
nrrl 4988
nrrl 4773
IBt 22153
soil under coconut palm in coffee plantation,
cBs 102799 IBt 22154
soil under coconut palm in coffee plantation,
nrrl 4649
soil from artemisia grassland, usa, wyoming,
teton Basin
eF652511
IBt 21910
ay339999
cBs 470.88 IBt 21911
ay340000
coal mine spoil material, wyoming, usa,
cultures are deposited in/were obtained from the following collections: cBs, cBs-Knaw Fungal Biodiversity centre, utrecht, the netherlands;
IBt, culture collection of Fungi, mycology group, Biocentrum-dtu, technical university of denmark, lyngby, denmark; nrrl, agricultural
aspergillus
karnatakaensis
sp. nov.
-..,l&l)
N+e1.e3e+e&.2*2
-..,l'&)
-..,l''#
-..,l)((
N+e1.e3e+e&.2*2
-..,l&l)
-..,l'&)
-..,l)((
Fig. 1.
one of the two equally mP trees obtained based on phylogenetic analysis of
-tubulin sequence data of
aenei.
Fig. 2.
the single mP tree obtained based on phylogenetic analysis of calmodulin sequence data of
aenei.
numbers above
arga
et al
parsimony informative sites; mP analysis resulted in a single
most parsimonious tree (length 485, consistency index
0.7402, retention index 0.8040), which is presented in Fig.
2. the Its data set consisted of 451 characters, including
43 parsimony informative sites; mP analysis resulted in four
equally most parsimonious trees (length 105, consistency
index 0.8190, retention index 0.8541), one of which is
the two isolates from Karnataka, India were found to be
closely related to
aspergillus aeneus
based on phylogenetic
analysis of protein coding sequences (Figs 1, 2), and had
identical Its sequences to
a. aeneus
(Fig. 3). one additional
isolate also from India, “
.
aeneus
” nrrl 4649 ( ImI 086833)
was found to be conspecic with these two isolates. this
isolate was obtained from soil of the machrar river bed in
the district of Bansa, madhya Pradesh (rai
et al.
1964), and
is morphologically similar to the other two Indian isolates.
the three isolates are described here as a new taxon,
a.
karnatakaensis
sp. nov
.
a typical characteristic is the formation
of a crust of hülle cells. the strains were incubated on various
media for ascoma production, but in none of the strains were
ascomata or ascospores found. also, a mating experiment
with the three strains did not induce ascoma production.
aspergillus karnatakaensis
formed a well-supported
clade together with four
species,
e. foeniculicola,
e. bicolor, e. spectabilis
and
e. discophora
, and four species
known to reproduce only asexually, including
a. aeneus,
a. eburneocremeus, a. crustosus
and
a. heyangensis
on the trees based on calmodulin (Fig. 4),
-tubulin, and
Its sequence data (data not shown). Based on these
observations, we describe
sect.
sect. nov.
to accommodate these species within subgenus
this group of species was originally assigned to section
(raper & Fennell 1965, christensen
et al.
1978,
aspergillus karnatakaensis
isolates were found to produce
karnatakafurans a and B (manniche
et al.
2004), terrein,
gregatins, asteltoxin (until now only detected in cBs 102799)
and the partially characterised metabolite nIdu. Both
gregatins and nIdu are also produced by
a. granulosus
while karnatakafurans are produced in common with
and
a. multicolor
. however, phylogenetic analysis
of sequence data of
a. multicolor
(Peterson 2008) and
(houbraken
et al.
2007) indicated that they are
among the other species found to belong to the same
clade as
a. karnatakaensis, emericella bicolor
produces
sterigmatocystin, versicolorins, some anthraquinones, and a
polar extrolite with end-absorption;
e. foeniculicola
produces
sterigmatocystin (and many other sterigmatocystin and
versicolorin-related compounds), xanthocillin derivatives,
and the partially characterized (but common) metabolite drI;
e. spectabilis
produces two members of the shamixanthone
biosynthetic family (both more polar than shamixanthone itself)
and a member of the sterigmatocystin biosynthetic family;
a. heyangensis
produces a decaturin in common with
and
a. karnatakaensis
and nIdu, while
e. discophora
produces sterigmatocystin and versicolorins (zalar
et al.
-..,l&l)
N+e1.e3e+e&.2*2
-..,l'&)
-..,l''#
Fig. 3.
one of four equally mP trees obtained based on phylogenetic analysis of Its sequence data of
aspergillus
karnatakaensis
sp. nov.
2008). decaturins are antiinsectan metabolites which have
previously been identied in
species including
P.
and
P. decaturense
(zhang
et al.
2003, li
et al.
2005).
aspergillus eburneocremeus
has both sterigmatocystin and
mer nF-8054X in common with
e. heterothallica
is different from all these species in producing only
Pr-toxin and related mycotoxins, and has no extrolites in
common with the other species in sect.
. all
species in sect.
produce sterigmatocystin, while the
species without a known teleomorph apparently
cannot produce it, with the exception of
a. eburneocremeus
however, sterigmatocystin is common throughout the different
sections of subgenus
, and has even been found
in sections
and
(Frisvad
et al.
2005).
other extrolites such as shamixanthones, mer nF-8054X and
the related emesterones, and terrein have also been found in
other species in section
nidulantes
aspergillus heyangensis
is only known from ex-type cultures and re-examination of
the cultures showed that the taxon has great similarities with
the species mentioned above, including its inability to grow
at 37 °c, and the shape of the conidial heads and vesicles,
although this species does not produce hülle cells (Fig. 5).
that species also produces the unknown metabolite nIdu,
(table 2).
%N4+;7+ +4+/7<3<
-..,l&l)
%N?/;<3-858;
-..,l&le
-..,ee'
%N +,+-37><
-..,l')!
%N?/;<3-858;
%N9;8 >,/;><
+*/!! #(e
%N+>;/85+ ><)
..,%!e&
%N+<9/;/<-/7<
+*/!! N%!
%N-+/<93 8<><
-..,!)e)
%N;/->;?+ ><
-..,l) e
-..,eel
-..,l!'(
N! l#e
N#!(l %'e&
-..,l&))
arga
et al
Fig. 5.
aspergillus heyangensis
(cBs 101751).
colonies incubated at 25 °c for 7 d; a on cya, B on mea, c on crea.
conidiophores
aspergillus
karnatakaensis
sp. nov.
aspergillus karnatakaensis
varga, Frisvad &
sp. nov.
emericellae
similibus. conidiophoris cum stipitibus laevibus,
conidiis subglobosis vel late ellipsoideis. aggregationibus insignibus
cum tegumento ex cellulis globosis efferentibus.
typus
:
Karnataka, near chickmagalur, netraconda
estate, isolated from soil under coconut palm (
cocos nucifera
in coffee plantation, 20 dec. 1996,
J.c. Frisvad
(cBs h-20502
on cya, at 25 °c: 31–37 mm diam after 7 d, reverse
orange; on mea, at 25 °c: 12–19 mm, reverse yellow; on
yes, at 25 °c: 33–45 mm, reverse pink to raspberry-red
reverse; on oat, at 25 °c: 16–23 mm, hülle cells present; on
cya, at 37 °c: no growth to micro-colony (<1 mm); on crea:
weak to moderate growth, no acid production.
conidial heads
reddish brown, yellow exudate droplets on cya colonies.
biseriate, smooth, light brown stipes, 2.5–4
µm wide; vesicles subglobose to subclavate, 5–8 µm diam.
conidiogenous cells
(phialides) 2–2.5 × 4–5 µm, metulae,
2–3 × 4–6 µm.
globose or rarely subglobose, smooth
to nely roughened, hülle cells produced in crusts, globose to
diagnostic features
apart from producing gregatins,
terrein, and karnatakafuran a and B, isolates of this species
produce a series of uorescing extrolites (more than 33) with
characteristic uv spectra. also distinguished by producing
varga & samson
, sect. nov.
sectionis nidulantium similis, sed taxis cum conidiophoris brunneolis,
vesiculis ampulliformibus et capitulis conidiorum biserialibus; statu
anamorphoso cum ascosporis laevibus, convexis, aequatorialiter
typus
species assigned to
aspergillus
sect.
form a well-
supported clade, basal to section
Peterson
(2008) based on Its,
-tubulin, calmodulin, and rna
polymerase 2 sequences (see Fig. 11 in Peterson 2008).
the section includes four species able to reproduce both
sexually and asexually (
emericella discophora, e. bicolor,
e. spectabilis, e. foeniculicola)
, and ve species for which
the teleomorph is unknown (
a. aeneus, a. eburneocremeus,
a. crustosus, a. heyangensis,
a. karnatakaensis
all species are characterised by brownish conidiophores,
ask-shaped vesicles, and biseriate conidial heads. several
species produce hülle cells abundantly in masses (except for
a. heyangensis
, which does not produce hülle cells at all).
the teleomorph-producing species assigned to this section all
have smooth convex ascospores with two equatorial crests.
none of the species assigned to this section are able to grow
at or above 40 °c. all teleomorph species, together with
are able to produce sterigmatocystin. the
relationship of
e. spectabilis
to
a. crustosus
has already been
suggested by christensen
et al.
(1978), while
e. discophora
was found to be related to
e. foeniculicola
(zalar
et al.
2008).
table 2.
cBs 101751 IBt 29634
IBt 22154 cBs 102799
asteltoxin, gregatins, karnatakafuran a and B, quinolactacin
IBt 22153 cBs 102800
asteltoxin, gregatins, karnatakafuran a and B, physcion, quinolactacin, terrein,
a decaturin, karnatakafuran a and B, terrein, guum*
cBs 425.77 IBt 22833
cBs 469.88 IBt 21910
cBs 470.88 IBt 21911
cBs 156.80 IBt 22831
drI, sterigmatocystin, xanthocillin Fa
wB 5097 IBt 22604
cBs 489.65 wB 5096 IBt 22607
wB 4981 IBt 22605
wB 4983 IBt 22606
cBs 429.77 IBt 22891
arga
et al
Fig. 6.
aspergillus karnatakaensis
(cBs 102800).
a, B.
colonies incubated at 25 °c for 7 d, a on cya, B on mea. c, crusts of hülle cells,.
F.
aspergillus
karnatakaensis
sp. nov.
we are grateful to dr r naidu for permission to sample soil for
mycological examinations in the coffee research station and
associated estates near chickmagalur, Karnataka, India. tineke van
doorn helped with the morphological data and uwe Braun kindly
provided the latin diagnosis. we are also indebted to our referees.
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novel antiinsectan oxalicine alkaloids from two undescribed
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