Book of Abstracts (PDF) - International Mycological Association

IMC7 Main Congress Theme II: SYSTEMATICS, PHYLOGENY AND EVOLUTION Posters
shape are not phylogenetically informative, but are the
result of convergent evolution.
640 - Determination of biological species and analysis of
genetic variability by RAPD of strains of Pleurotus
subgenus Coremiopleurotus
M. Capelari 1* & M.H.P. Fungaro 2
1 Instituto de Botânica, Caixa Postal 4005, São Paulo, SP,
CEP 01061-970, Brazil. - 2 Universidade Estadual de
Londrina, Londrina, PR, Brazil. - E-mail:
mcapelariibot@yahoo.com
Pleurotus cystidiosus and P. smithii strains of different
geographic origins were studied in terms of growth rate in
culture, mono-dikaryotic matings and genetic variability
determined by RADP in order to prove the occurrence of P.
cystidiosus in South America. The present results show that
the criteria used to separate the two species are
unsatisfactory and that P. smithii should be considered a
synonym of P. cystidiosus, thus extending the distribution
of this species to Central and South America.
641 - Phylogenetic relationships among the bunt fungi
L.A. Castlebury 1* & L.M. Carris 2
1 USDA ARS Systematic Botany and Mycology Laboratory,
10300 Baltimore Ave., Beltsville, MD 20705, U.S.A. -
2 Dept. of Plant Pathology, Washington State University,
Pullman, WA 99164-6430, U.S.A. - E-mail: lisa@nt.arsgrin.gov
There are approximately 120 species of bunt fungi in
Tilletia and related genera that parasitize members of the
Poaceae. Most species are distinguished by teliospore
ornamentation and host. A number of non-reticulate-spored
species in Tilletia have been placed in other genera in the
Tilletiales including Neovossia, Conidiosporomyces,
Ingoldiomyces, and Oberwinkleria. Two economically
important species, T. indica (Karnal bunt) and T. horrida
(rice kernel smut) have been placed in Neovossia on the
basis of tuberculate teliospore ornamentation, floret
infection and the production of large number of nonconjugating
basidiospores. Phylogenetic analysis of large
subunit nuclear rDNA sequences shows that reticulatespored
taxa with hosts in the Pooideae, including T. tritici,
T. laevis and T. controversa, form a well-supported
monophyletic group (bootstrap >95%). Tilletia indica and
T. walkeri, also on members of the Pooideae, form a wellsupported
group (100%) and group with reticulate-spored
taxa and Ingoldiomyces hyalospora on hosts in the
Pooideae (bootstrap >70%). A few reticulate-spored taxa
and other tuberculate-spored taxa on non-Pooideae hosts,
including T. horrida, fall in a separate, unsupported group
although a number of well-supported lineages exist within
this group. Conidiosporomyces ayresii groups strongly
with T. vittata. Results suggest that host may be more
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Book of Abstracts
phylogenetically informative than morphological
characters.
642 - Taxonomic revision of the lichen genus
Heterodermia (Physciaceae) from China's mainland
J.B. Chen
Institute of Microbiology, Academia Sinica, P.O.Box 2714,
Beijing 100080, China. - E-mail: chenjbin@yahoo.com
Thirty-one species of Heterodermia are recognized from
China's mainland, based on examination of more than 1000
specimens kept in HAMS. Of which, H. orientalis and H.
sinocomosa were described as new (Chen, 2001), and H.
galactophylla, H. pseudosquamulosa and H. rubescens are
added to Chinese lichen flora. The previous records of H.
erinacea and H. granulifera are proved to be mistaken
reports. They are actually H. pellucida and H. isidiophora
respectively and should be excluded from Chinese lichen
flora. The previous records of H. albicans, H. barbifera
and H. dactilyza from China are doubtful.
Biogeographically, H. boryi, H. comosa, H. diademata, H.
flabellata, H. isidiophora, H. leucomela, H. lutescens, H.
obscurata, H. podocarpa, H. propagulifera, H.
pseudospeciosa and H. speciosa are tropical and/or
temperate. H. angustiloba, H. dendritica, H. firmula, H.
fragilissima, H. microphylla, H. orientalis, H. pellucida, H.
pseudosquamulosa, H. rubescens, H. sinocomosa, H.
subascendens and H. togashii are eastern Asian or southern
Asian. Of which H. orientalis, H. pseudosquamulosa and
H. sinocomosa are endemic to China. H. dissecta and H.
hypoleuca are disjunctive in eastern Asia and eastern North
America. H. pacifica occurs in Pacific region. The
geographical affinities of H. galactophylla, H. hypochraea,
H. hypocaesia and H. japonica are still uncertain. H.
corallophora, H. incana, H. pandurata and H. spinula
recorded in Taiwan of China have not been found in
China's mainland.
643 - Some merosporangiferous Mucorales indigenous
to dungs of house mice in Taiwan
C.-Y. Chien
Dept. of Biology, National Taiwan Normal University, 88
Tingchou Rd., Sec. 4, Taipei, 117, Taiwan. - E-mail:
cychien@cc.ntnu.edu.tw
During studies of coprophilous fungi indigenous to dung of
house mice, some merosporangiferous Mucorales were
isolated. By the use of corn meal agar (CMA) and malt
extract agar (MEA) media as well as technique favor the
isolation of merosporangiferous fungi in Taiwan. Dung of
samples of mice in houses or garages was collected directly
into glass vials for transport to laboratory. The materials
then were dispended into aseptic damp chambers prepared
by moistening of filter paper discs in Petri dishes having
depths of two centimeters or they were put directly onto