Book of Abstracts (PDF) - International Mycological Association

IMC7 Main Congress Theme II: SYSTEMATICS, PHYLOGENY AND EVOLUTION Posters
683 - The genus Gymnopilus (Basidiomycetes,
Agaricales) in the Czech Republic
J. Holec
National Museum, Mycological Department, Vaclavske
nam. 68, 115 79 Praha 1, Czech Republic. - E-mail:
jan.holec@nm.cz
A project dealing with the taxonomy and distribution of the
genus Gymnopilus in the Czech Republic was started in
2001. Up to now, 7 species were recognised. Gymnopilus
picreus is common in mountains but scarce to rare in
highlands and lowlands. Gymnopilus bellulus is found
almost exclusively in natural to virgin montane forests.
Gymnopilus josserandii (= G. subsphaerosporus) is very
rare and grows in the same habitats like G. bellulus.
Gymnopilus flavus is rarely found in forest meadows of
Moravia. Gymnopilus fulgens is also rare. It was collected
on peaty soil in a forest near Prague. Gymnopilus
spectabilis is scarce in lowlands and hilly country.
Concerning the group of G. sapineus and G. penetrans, my
preliminary results show that there are no differences in
microcharacters between collections with smooth and scaly
pileus. For the present I agree with Høiland that there is
only one species, namely Gymnopilus sapineus s.l. It is the
most abundant species of Gymnopilus in the Czech
Republic. The species growing on burnt places (G. odini,
G. decipiens) are extremely rare or even absent in the
Czech Republic as no collections are kept in Czech
herbaria and no fresh fruitbodies were found in the year
2001. The taxonomic value of some interesting collections
(e.g a whitish form of G. spectabilis or a species with the
vinaceous red pileus growing on soil among mosses) will
be evaluated in the future.
684 - Delimitation of the genus Ciboria (Sclerotiniaceae,
Helotiales, Ascomycota) based on rDNA sequence,
morphology, ultrastructure and life history data
A. Holst-Jensen 1* , T. Oftedal 2 & T. Schumacher 3
1 National Veterinary Institute, Section of Feed and Food
Microbiology, Ullevålsveien 68, P.O.Box 8156 Dep., 0033
Oslo, Norway. - 2 Mycoteam AS, Forskningsvn. 3B,
P.O.Box 5, Blindern, 0313 Oslo, Norway. - 3 University of
Oslo, Department of Biology, Ascomycete Research group
Oslo (ARON), P.O.Box 1045, Blindern, 0316 Oslo,
Norway. - E-mail: arne.holst-jensen@vetinst.no
The current delimitation of the genus Ciboria includes taxa
with cup-shaped to plane to recurved, brownish, stipitate
apothecia with an outer excipulum of globose cells,
producing ellipsoid, hyaline, unicellular meiospores and
substratal stromata, and lacking a macroconidial mitosporic
state. Species of Ciboria infect a wide range of host plants
and tissues, and is morphologically heterogeneous. Recent
studies based on rDNA sequence data and ultrastructural
data have indicated that the genus is polyphyletic. Here we
present a more comprehensive study including new as well
as previously published rDNA sequence data and
phylogenetic evidence, and discuss the resulting phylogeny
in comparison with available data on morphology,
ultrastructure and life history. We conclude that the genus
should be restricted to comprise only a group of taxa
infecting and mummifying catkins of trees in the plant
families Betulaceae, Corylaceae and Salicaceae. Another
distinct group currently classified in Ciboria but
characterised by production of verrucose ascospores,
infects seeds of host in Betulaceae, develops very dense
and hard stromata and appears to be obligate biotrophs. We
conclude that this group deserves rank as a separate genus.
Several taxa currently classified as Ciboria should be
excluded from the genus, but their taxonomic status remain
uncertain until additional phylogenetic evidence is made
available.
685 - Taxonomy of Rhytismatales in China
C.-L. Hou 1* , M. Piepenbring 2 & F. Oberwinkler 1
1 Lehrstuhl Spezielle Botanik/Mykologie, Botanisches
Institut, Universität Tübingen, Auf der Morgenstelle 1,
72076 Tuebingen, Germany. - 2 Botanisches Institut,
Universität Frankfurt, Senckenberganlage 31-33, 60054
Frankfurt/M, Germany. - E-mail: Cheng-lin.heu@unituebingen.de
The Rhytismatales are a well-known order of ascomycetes,
which is widely distributed in temperate and tropical
regions of the world. Some members of this order can
cause considerable economic damage on trees.
Lophodermium seditiosum which causes serious needle
cast of Pinus sylvestris and Ploioderma pini-armandii
causing withering of needles of Pinus armandi, for
example, are known from Western China.The abundance of
members of Rhytismatales has been documented for
Europe, North America, and Australia, but in the past only
few species were reported from China. Since 1990,
however, many new members were described, especially
from tropical and subtropical regions of China. A total of
17 genera and 117 species were documented by the end of
2000. As a continuation of this effort the authors made an
expedition to the Yunnan Province located in Southwestern
China and to the Anhui province in Southeastern China in
2001. A microscopic analysis of more than 120 collections
revealed 12 genera, Bifusella, Coccomyces, Colpoma,
Davisomycella, Duplicaria, Hypoderma, Lirula,
Lophodermium, Naemacyclus, Neococcomyces,
Ploioderma, and Soleella - represented by 38 species.
Among these 16 are species new for science. Three genera
and five species are recorded for China for the first time.
Book of Abstracts 207