Book of Abstracts (PDF) - International Mycological Association

IMC7 Main Congress Theme II: SYSTEMATICS, PHYLOGENY AND EVOLUTION Posters
The genus Xanthoria has been delimited on its foliose
thallus morphology and the presence of upper and lower
cortical layers. The morphology and anatomy of the genus
have recently been described in several papers, and
molecular phylogenetic studies have shown it to be
polyphyletic. One of these lineages is the X. fallax (or
ulophyllodes) group. The Xanthoria fallax group is
characterised primarily by having bacilliform spermatia
and well-developed rhizinae. Furthermore, many of the
species produce soredia. At present the group includes the
seventeen species. Molecular studies based on nuclear
ribosomal DNA suggest that the X. fallax group is a
separate lineage diverging at the very base of the genus
Xanthoria, and HPLC-studies of the anthraquinones in
Xanthoria also pointed at particular characteristics of the X.
fallax group. The strong indications that the X. fallax group
was circumscribed by a number of different and unrelated
character sets prompted us to perform a closer study of the
morphology, anatomy, secondary chemistry, and molecular
phylogeny of the group. The monotypic, recently described
genus Xanthomendoza, was included in the study as it was
known from molecular studies also to have a basal position
relative to Xanthoria. Apart from the new generic
scircumscription of the xanthorioid lichens many new
species, especieally from the southern hemisphere are
being been described.
704 - Phylogeography and molecular variation in
Serpula lacrymans and S. himantioides
H. Kauserud 1* , A. Holst-Jensen 2 & T. Schumacher 1
1 University of Oslo, Department of Biology, P.O.Box 1045
Blindern, 0316 Oslo, Norway. - 2 National Veterinary
Institute, Department of Feed and Food Microbiology,
P.O.Box 8156 Dep, 0033 Oslo, Norway. - E-mail:
haavarka@bio.uio.no
The dry rot fungus Serpula lacrymans, predominantly
found in houses, and its sister taxon S. himantioides,
mostly occurring outdoors, have global distributions in
temperate regions. The phylogeography of both species
were investigated on a global scale using DNA-sequences
from three target loci; the nrDNA internal transcribed
spacer (ITS) region, and partial sequences of the bettatubulin
(btub) and translation elongation factor 1 alpha
(efa) genes. Preliminary data suggest the existence of two
varieties of S. lacrymans, one predominantly occurring
indoor, and one growing in the wild. Little genetic
variation was found in worldwide S. lacrymans ITS, btub
and efa sequences of the domesticated variety; obtained
ITS sequences from Canada, China, Europe, Mexico and
New Zealand were identical to ITS GeneBank sequences
from Himalaya and Australia. In S. himantioides, on the
other hand, extensive sequence variation was found in all
three target loci. The preliminary data suggest that the
domesticated S. lacrymans variety has experienced a
bottleneck event coupled to a recent worldwide spread-out.
705 - Genotypes of Lobaria pulmonaria along an East -
West transect in Eurasia
C. Keller 1* , C. Cornejo 1 , J.-C. Walser 1 , I. Mikhailova 2 , T.
Pystina 3 , S. Chabanenko 4 , S.Ya. Kondratyuk 5 & C.
Scheidegger 1
1 WSL Swiss Federal Research Institute, CH-8903
Birmensdorf, Switzerland. - 2 Institute of Plant and Animal
Ecology, 8 Marta Str. 202, 620141 Ekaterinburg, Russia. -
3 Institute of Biology, Komi Science Centre,
Kommunisticheskaya str. 28, 167610 Syktyvkar, Komi
Republic, Russia. - 4 Sakhalin Botanical Garden, Gorky
street 25, 693023 Yuzhno-Sakhalinsk, Russia. - 5 Kholodny
Institute of Botany, Tereshchenkivska str. 2, Kiew MSP-1,
Ukraine. - E-mail: christine.keller@wsl.ch
Lobaria is a conspicuous foliose lichen species. The
species was common in pre-industrial periods in humid
temperate and boreal regions of the Northern Hemisphere,
and cooler parts of the Tropics. Unfortunately this species
suffered a tremendous decline during the past decades and
the species is now considered endangered in most parts of
Central Europe and other industrialised countries. North-
Eastern Asia is considered a diversity hotspot of L.
pulmonaria and related species. In Switzerland, recent
studies based on ITS I revealed genetically diverse and
impoverished populations. A geographic differentiation
among the local populations was not detected within this
small geographic area. In this paper we will test the
hypothesis that the genetic diversity of L. pulmonaria is
higher in the Far East of Russia compared to more western
populations. Specimens were collected in Sakhalin,
Northern Urals, Komi Republic (Russia), Ukrainian
Carpathians (Ukraine), Finland, Norway, Switzerland,
France and Portugal. We analysed a fragment, which
included the internal transcribed spacer ITS1, the 5.8S
ribosomal RNA gene, and parts of ITS2. The fungusspecific
primer ITS1-F and the recently developed L.
pulmonaria specific primer nu-ITSII-137-3' were used to
amplify the fragment.
706 - Survey of ophiostomatoid fungi in Austria,
Central Europe
T. Kirisits 1* , H. Konrad 1 , K. Jacobs 2 & M.J. Wingfield 3
1 Institute of Forest Entomology, Forest Pathology and
Forest Protection (IFFF), Universität für Bodenkultur
Wien, Hasenauerstrasse 38, A-1190 Vienna, Austria. -
2 Eastern Cereal and Oilseed Research Centre, Agriculture
and Agri-Food Canada, Ottawa, Ontario, K1A 0C6,
Canada. - 3 Forestry and Agricultural Biotechnology
Institute (FABI), Faculty of Biological and Agricultural
Sciences, University of Pretoria, Pretoria 0002, South
Africa. - E-mail: kirisits@edv1.boku.ac.at
Fungi belonging to the ascomycetous genera Ceratocystis,
Ceratocystiopsis and Ophiostoma and related anamorph
genera such as Leptographium, Pesotum and Graphium are
Book of Abstracts 213