Book of Abstracts (PDF) - International Mycological Association

IMC7 Main Congress Theme I: BIODIVERSITY AND CONSERVATION Posters
521 - Lobariaceae (Lecanorales, lichenised Ascomycota)
of Mauritius and La Réunion in the Indian Ocean
A.C. Holm 1* , R. Gregersen 1 , U. Søchting 1 & E. Timdal 2
1 Department of Mycology, Botanical Institute, University
of Copenhagen, O. Farimagsgade 2D, DK-1353
Copenhagen K, Denmark. - 2 Botanical Museum, University
of Oslo, Sars gate 1, N-0562 Oslo, Norway. - E-mail:
annechristine@hotmail.com
The lichen family Lobariaceae is a prominent part of the
lichen vegetation in the more humid areas of the tropical
islands Mauritius and La Reunion situated in the Indian
Ocean. During several excursions to the islands, the
authors and also Hildur Krog, Oslo collected about 400
specimens of Lobaria, Pseudocyphellaria and Sticta from
numerous sites. The collections include six species of
Lobaria, five species of Pseudocyphellaria and 10-12
species of Sticta. Very limited information on the
Lobariaceae of the islands has been published, and the
closest comprehensive treatment is the macrolichen flora of
East Africa by Swinscow and Krog (1988). Lobaria
holstiana is not previously reported from the islands and
Sticta cf. cinereoglauca appears to be new to Africa and
adjacent islands. All of the species are pantropical, except
Lobaria holstiana and Sticta dichotoma. L. holstiana is
known from Tanzania, Mauritius and La Réunion, whereas
S. dichotoma is found in Eastern Africa, the Mascarenes
and Panama. However, S. dichotoma may be conspecific
with the pantropical species S. canariensis. The
photosymbiodemes of Sticta dichotoma and S.
cinereoglauca are described.
522 - The merosporagiferous fungi in Taiwan
H. Hsiao-Man
Dept. of Natural Sci. Edu.,Natl. Taipei Teachers College.,
134, Sect. 2, Hoping, E. Rd.,Taipei, Taiwan, Taiwan.
During an investigation of merosporangiferous
Zygomycetes in Taiwan, eight species of the family
Piptocephalidaceae (Zoopagales) were isolated. Two of
these species belong to the genus Piptocephalis. They are
Piptocephalis cylindrospora and P. sphaerica. Six species
belong to the genus Syncephalis. They are Syncephalis
cornu, S. depressa, S. obconica, S. parvula, S. sphaerica
and S. ventricosa. All species represent new records to
Taiwan. Previously none of the family Piptocephalidaceae
was described from Taiwan. These eight species were all
isolated from soil or dung in Taiwan, mainly mountain
area. The morphological characters together with their
hosts are reported.
523 - Rehabilitation of nutrient-poor grasslands
(waxcap grasslands) in dunes in the Netherlands: the
effect of active nature-management on the mycoflora
L.M. Jalink * & M.M. Nauta
National Herbarium Netherlands, Universiteit Leiden
branch, P.O. Box 9514, NL-2300 RA Leiden, The
Netherlands. - E-mail: l.m.jalink@hccnet.nl
The effect of active nature-management in grasslands in an
area in the dunes in the western part of the Netherlands is
evaluated. The mycoflora in 17 semi natural wet grasslands
with various management has been followed since 1985,
two during all years, others irregularly. All 17 grasslands
are situated in the Amsterdam Waterworks Dunes, a
protected area of 34 km 2 southwest of Haarlem. They are
mown, grazed or the topsoil has been removed. The dune
area has served as a drinking water source for the city of
Amsterdam which caused desiccation. Therefore
infiltration started some 30 years ago with unpurified river
water from the river Rhine. This caused an enormous
increase of e.g. Calamagrostis, the direct motive to start
active nature management in the former wet dune slacks.
Evaluation after 15 years shows positive results for plants
as well as macrofungi. There is a spectacular increase in
number of species and fruitbodies of the macrofungi
representative for Waxcap grasslands (Hygrocybe,
grassland Entoloma, Geoglossum, Trichoglossum,
Clavulinopsis, Clavaria). This type of grassland and its
representative species have been under serious threat in the
Netherlands since 1900. Of the investigated sites 5 have
now 10 or more species of Hygrocybe, and two of the
investigated sites belong now to the best Waxcapgrasslands
in the Netherlands. There seems to be little
difference in effect between grazing or mowing.
524 - Plant pathogenic and saprophytic fungi from
graminicolous hosts in Thailand
K. Jaroenthai 1 , L. Manoch 1* , C. Chamswarng 1 & P.
Suwanarit 2
1 Department of Plant Pathology, Faculty of Agriculture,
Kasetsart University, Bangkok 10900, Thailand. -
2 Department of Microbiology, Faculty of Science,
Kasetsart University, Bangkok 10900, Thailand. - E-mail:
agrlkm@ku.ac.th
In the present study, corn, rice and grass leaves showing
leaf blight and leaf spot symptoms were collected from
various locations in the North, North-East and Central
Thailand. They were used for isolation of plant pathogenic
and saprophytic fungi. Tissue transplanting method with
10% clorox and potato dextrose agar was used. The results
indicated that dematiaceous hyphomycetes found on Zea
mays included Bipolaris bicolor, B. maydis, B. zeicola,
Curvularia akaiiensis, C. eragrostidis. C. lunata,
Nigrospora sphaerica and Nodulisporium gregarium,
whereas Alternaria padwickii, Bipolaris hawaiiensis, B.
Book of Abstracts 159