Book of Abstracts (PDF) - International Mycological Association

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IMC7 Main Congress Theme II: SYSTEMATICS, PHYLOGENY AND EVOLUTION Posters Universität für Bodenkultur Wien, Hasenauerstrasse 38, A- 1190 Vienna, Austria. - E-mail: karin.jacobs@fabi.up.ac.za Tetropium species (Coleoptera: Cerambycidae) are secondary, though important pests of their host trees in Europe. Tetropium fuscum and T. castaneum principally infest Norway spruce (Picea abies), while Tetropium gabrieli attacks primarily European larch (Larix decidua). Recently, the fungal associates of Tetropium spp. in Europe and Canada came under scrutiny after the invasion of T. fuscum into Atlantic Canada. Outside its native habitat in Europe, T. fuscum proved to be a potentially devastating pest and with it came Ophiostoma tetropii, a fungus that has previously not been recorded in Canada. An unknown species of Ophiostoma was isolated from Norway spruce, infested by Tetropium sp. on European larch, infested by T. gabrieli in Europe. Although similar to O. minus, this fungus could be distinguished from this species and is described here as Ophiostoma kryptum prov. nom. Ophiostoma kryptum is characterized by perithecia with short necks and a Hyalorhinocladiella anamorph as well as a Leptographium-like anamorph. Although O. kryptum and O. minus are morphologically very similar, molecular data, significant differences in their colony morphologies on OA and MEA and differences in their habitat and insect vectors distinguish them. Ophiostoma minus and O. kryptum thus represent another example of morphologically similar, yet genetically and ecologically separated species in the ophiostomatoid fungi. 694 - Taxonomic re-evaluation of three related species of Graphium, based on phylogeny, morphology and ecology K. Jacobs 1* , T. Kirisits 2 & M.J. Wingfield 3 1 Eastern Cereal and Oilseed Research Centre, Agriculture and Agrifood Canada, 960 Carling Avenue, Ottawa, K1A 0C6, Canada. - 2 Institute of Forest Entomology, Forest Pathology and Forest Protection, Universität für Bodenkultur Wien, Hasenauerstrasse 38, A-1190 Vienna, Austria. - 3 Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0002, South Africa. - E-mail: karin.jacobs@fabi.up.ac.za Graphium pseudormiticum was described in 1994 from the galleries of the bark beetle, Orthotomicus erosus, introduced into South Africa from Europe. This fungus is characterized by conidia with conspicious basal frills that are produced in false chains, a trait not observed in other species of Graphium. Rhexographium fimbriasporum was described in 1995 from Ips typographus on Picea abies and was distinguished from Graphium based on its apparently unique conidiogenesis. The conidia of R. fimbriasporum are produced in false chains and have conspicious basal frills. In this study we compared G. pseudormiticum with R. fimbriasporum based on DNA sequences, morphology and ecology. We included a large collection of isolates, tentatively identified as Graphium spp., collected from I. typographus on Picea abies, Ips cembrae on Larix decidua and Tomicus minor on Pinus sylvestris. Graphium pseudormiticum and R. fimbriasporum were 210 Book of Abstracts morphologically similar and based on rDNA sequence (ITS and 18S), phylogenetically closely related but different, grouping with species of Graphium. Rhexographium fimbriasporum will thus be transferred to Graphium, but remains distinct from G. pseudormiticum. Another fungus with conidia and conidium development similar to G. pseudormiticum, is one of the dominant associates of I. cembrae on L. decidua in Europe. This fungus is distinguished from G. pseudormiticum and G. fimbriasporum based on morphology and phylogeny and is described as G. laricis prov. nom. 695 - Taxonomy of the lichen family Pertusariaceae in Thailand S. Jariangprasert 1* , A.W. Archer 2 , J.A. Elix 3 & V. Anusarnsunthorn 4 1 Maejo University, Biology Department, Faculty of Science, Chiang Mai 50290, Thailand. - 2 National Herbarium of New South Wales, 14 Romford, Epping, New South Wales 2121, Australia. - 3 Australian National University, Department of Chemistry, The Faculties, Australian National University, GPO Box 4, Canberra, ACT, 2601, Australia. - 4 Chiang Mai University, Biology Department, Faculty of Science, Chiang Mai 50200, Thailand. - E-mail: s_vipoosunti@yahoo.com The methods to identify the crustose lichen family Pertusariaceae are composed with morphological and anatomical studies, chemical test by spot test, UV test, recrystallization, thin layer chromatography (TLC) and high performance liquid chromatography (HPLC). That can identify Pertusariaceae into two genera Pertusaria and Ochrolechia. The different distinctly characters of Ochrolechia from Pertusaria are well-defined prominent exciple, vivid colour disc and the chemical, gyrophoric acid with a little amount of others. While as Pertusaria has two forms of apothecia, disciform and verruciform without superfacial thallus and more chemicals, xanthones, orcinol depsides, depsones and depsidones. Species of Pertusaria are P. albescens, P. amara, P. asiana, P. cicatricosa, P. cinchonae, P. coccopoda, P. commutata, P. leiocarpella, P. melaleucoides, P. patellifera, P. pertusa, P. scaberula, P. scutellifera, P. thwaitesii, P. tetrathalamia, P. tropica, P. velata, P. wattiana, P. xantholeuca and P. xylophyes. Most of them are new records in Thailand. Many specimens could be new species. Species of Ochrolechia are during identification. 696 - Phylogenetic relationships of Phellinus and allied taxa based on ITS1-5.8S-ITS2 sequences W. Jeong, Y. Lim, J. Lee * & H. Jung School of Biological Sciences, Seoul National University, 56-1 Shillim-dong, Kwanak-gu, Seoul 151-742, Korea. - Email: xylaria@empal.com
IMC7 Main Congress Theme II: SYSTEMATICS, PHYLOGENY AND EVOLUTION Posters To elucidate phylogenetic relationships of the Hymenochaetales, sequences of the nuclear ribosomal ITS1-5.8S-ITS2 region from 96 strains were analyzed. The results showed that Trichaptum and Schizopora are closely related to the Hymenochaetales. But Asterostroma, Phaeolus, and Vararia are placed outside the Hymenochaetales. Total twelve groups were recognized as separate clades. Eight groups were same as those recognized by early mycologists: Phellinus robustus complex (= Fomitiporia Murrill 1907), P. pini complex (= Porodaedalea Murrill 1905), P. igniarius complex (= Phellinus Quélet 1886), P. rimosus complex (= Fulvifomes Murrill 1914), P. ferruginosus complex (= Fuscoporia Murrill 1907), Inonotus radiatus complex (= Mensularia Lazaro 1916), I. hispidus complex (= Inonotus P. Karst. 1880) and the eighth group (= Inocutis Fiasson & Niemelä 1984). Four groups were newly recognized in this study. The first group was temporarily named as P. linteus complex. Hymenochaete formed two separate groups that did not include any species of Phellinus and Inonotus. The last group, consisted of three Phellinus species and two Inonotus species, occupied a basal position of the main clade and clustered with Schizopora and Trichaptum. The present study confirmed that Phellinus is polyphyletic and, furthermore, rejected the widely acknowledged monophyly concept of Inonotus. The species of Inonotus were so intermingled with Phellinus species that the genus became topologically polyphyletic. 697 - Secondary metabolite syndromes in the lichen genus Letrouitia (Ascomycota, Letrouitiaceae) S. Johansson * & U. Søchting Department of Mycology, Bothanical Institute, University of Copenhagen, O. Farimagsgade 2D, DK-1353 Copenhagen K., Denmark. - E-mail: s.johansson@get2net.dk Secondary metabolites from the lichen genus Letrouitia Haf. & Bell. were analysed with HPLC. Most of the species contained the anthraquinones parietin and fragilin, and a few also 7-chloroemodin. In addition, a number of additional secondary compounds were detected, presenting chemosyndromes that in most cases are characteristic for each species. 698 - Biology and systematics of the Saprolegniaceae: A treatise T.W. Johnson 1 , R.L. Seymour 2 & D.E. Padgett 3* 1 Duke Univ. (retired), Durham, NC, U.S.A. - 2 The Ohio State Univ. (retired), Columbus, Ohio, U.S.A. - 3 The Univ. of NC at Wilmington, Wilmington, NC, U.S.A. - E-mail: Padgett@uncwil.edu We are pleased to announce the impending publication of a comprehensive treatise on the biology and systematics of the watermolds (Mastigomycota: Saprolegniaceae). This work critically analyzes the world literature on this family covering the period from 1750 through 1987 - citing >2800 references - with a brief excursion to 2000 in the systematic section. It includes 30 chapters (with 49 tables and 58 figures) dealing with important aspects of watermold biology and an additional 20 in which we present a comprehensive revision of the systematics. Keys to the family and genera are presented together with extensive illustrations of included taxa. This work will be available to the world scientific community at no charge on the worldwide web probably by August 2002. It can be accessed using the URL http://www.ilumina-dlib.org/ by selecting "advanced search". In the advanced search window, type "Padgett" in the "contributor search window", tic "book" in the "learning resource type" window directly below, then click on the "submit" button. We hope that our effort will stimulate renewed interest in this fascinating group of organisms. 699 - Systematics of Australian Dermocybe R.H. Jones 1 , T.W. May 2* & F. Udovicic 2 1 School of Botany, The University of Melbourne, Victoria 3010, Australia. - 2 Royal Botanic Gardens Melbourne, Private Bag 2000, South Yarra, Victoria 3141, Australia. - E-mail: tom.may@rbg.vic.gov.au The ectomycorrhizal basidiomycete genus Dermocybe is well represented in a diverse range of ecosystems on most continents. There has been a paucity of reliable taxonomic information for Australian species, and many collections of Dermocybe from Australia have previously been incorrectly assigned to Northern Hemisphere species. Several Australian species have considerable differences in pigment chemistry to their Northern counterparts, including a number of unique chemical compounds. Morphology and pigment chemistry (thin-layer chromatography) were used in phenetic analyses of 110 Australian Dermocybe collections. Nineteen taxonomic groups were identified at species level, of which 11 are undescribed. Representatives from 12 of these groups were combined with 25 other members of Cortinarius and Dermocybe from the Northern and Southern Hemispheres in parsimony analyses using ITS rDNA sequence data. Trees show Dermocybe as monophyletic, but Cortinarius as paraphyletic. Dermocybe aff. sanguinea from the Southern Hemisphere is sister group to the clade of Northern Hemisphere dermocybes. Northern Hemisphere members of Dermocybe, with the exception of D. olivaceopicta, form a separate clade to the Southern Hemisphere taxa. Southern Hemisphere Dermocybe are consistently placed basal to Northern Hemisphere members. Book of Abstracts 211
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Cavernularia: 356 Cenococcum: 500,
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