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IMC7 Main Congress Theme II: SYSTEMATICS, PHYLOGENY AND EVOLUTION Posters from morphological studies, cross-inoculations and isozyme analyses. However, for stromatal morphology, the type description of E. eugeniae does not concur with that of C. cubensis. New collections of Cryphonectria have become available to us and the aim of this study was to consider the validity of the synonymy of these two fungi. Isolates of C. cubensis and E. eugeniae were compared based on DNA sequences from the ITS1/ITS2 region and beta-tubulin genes. Specimens of clove in Zanzibar and South East Asia, were also compared morphologically with specimens of C. cubensis from Eucalyptus. Phylogenetic analyses showed that the majority of isolates from clove grouped together with C. cubensis isolates. A smaller number of isolates from Indonesia, however, grouped separately from the Cryphonectria and C. cubensis clades. Two fungi with different tissue types were observed on clove bark. One of these resembled C. cubensis. The other fungus is a species morphologically similar to Cryphonectria. The C. cubensis anamorph was morphologically variable on clove, which might explain anomalies regarding the description of E. eugeniae. Our results suggest that the synonymy of C. cubensis and E. eugeniae is valid. However, there is another fungus, closely related to Cryphonectria, also present on clove. 674 - The genus Urocystis (Ustilaginomycetes) in China L. Guo Institute of Microbiology, Academia Sinica, Beijing 100080, China. - E-mail: guol@sun.im.ac.cn For the genus Urocystis in China, Ling(1953) described 4 species and Wang (1963) published 11 species. In 1979 Tai Fanlan in his 'Sylloge Fungorum Sinicorum' recorded 13 species. So far a total of 36 species of the genus Urocystis are reported from China, distributed among 33 genera of 9 families of the host plants. These smut species are arranged alphabetically as follows: Urocystis achnatheri, U. agropyri, U. agropyri-campestris, U. agrostidis, U. antipolitana, U. beijingensis, U. bolivari, U. brassicae, U. bromi, U. calamagrostidis, U. clintoniae, U. delphinii, U. dioscoreae, U. fischeri, U. granulosa, U. helanensis, U. hierochloae, U. irregularis, U. japonica, U. leersiae, U. magica, U. melicae, U. nevodovskyi, U. occulta, U. paridis, U. poae, U. primulicola, U. pulsatillae, U. qinghaiensis, U. ranunculi, U. rodgersiae, U. sorosporioides, U. stipae, U. tritici, U. ulei and U. yunnanensis. Among them, U. achnatheri, U. beijingensis, U. helanensis, U. qinghaiensis and U. yunnanensis were recently discovered as new species, known only from type locality and possibly endemic. 204 Book of Abstracts 675 - Traditional infrageneric classifications of Gymnopilus (Agaricales, Cortinariaceae) are not supported by ribosomal DNA sequence data L. Guzmán-Dávalos 1* , G.M. Mueller 2 , J. Cifuentes 3 , A.N. Miller 2 & A. Santerre 4 1 Departamento de Botánica y Zoología, Universidad de Guadalajara, Apdo. postal 1-139, Zapopan, Jal., 45101, Mexico. - 2 The Field Museum of Natural History, 1400 South Lake Shore Drive, Chicago, Ill 60605-2496, U.S.A. - 3 Facultad de Ciencias, UNAM, Circuito Exterior, Cd. UNiversitaria, México, D.F., 04510, Mexico. - 4 Departamento de Biología Celular y Molecular, Universidad de Guadalajara, Zapopan, Jal., Mexico. - Email: lguzman@cucba.udg.mx Fulvidula (Gymnopilus P. Karst.) was divided by Romagnesi (1942) into Annulatae and Cortinatae (= section Gymnopilus Singer). The first includes species with a persistent, membranous annulus and the second species with an arachnoid veil. Hesler (1969) elevated Singer's sections to subgenera and divided Gymnopilus into two sections: Microspori and Gymnopilus. Guzmán-Dávalos (1995) proposed a third section, Macrospori, within Gymnopilus. This classification has been accepted by most authors; even though the assignment of a species is oftentimes ambiguous. Here we test the monophyly of Gymnopilus and the appropriateness of the current classification system using ribosomal nuclear ITS1-5.8S- ITS2 sequence data. Phylogenetic analyses of 59 sequences (53 ingroup and 6 outgroup) were performed using maximum parsimony. Initial analyses support the monophyly of Gymnopilus. Its division into the two traditional subgenera was not supported, neither was the recognition of the three sections in subgenus Gymnopilus. Four well-supported clades were identified in the genus: 1) the spectabilis-imperialis group; 2) the penetrans-sapineus complex; 3) a clade formed by G. underwoodii, G. validipes and G. cf. flavidellus; and 4) the dilepis-medius group. Thus, while the presence of a membranous veil and the size of the basidiospores traditionally have been used to support infrageneric groups, these characters have been shown to be highly homoplastic, and of little use at this taxonomic level. 676 - Species level identification of the barley pathogens in Pyrenophora: Morphological versus molecular evidence S. Hambleton * , R.A. Shoemaker, K.A. Seifert & H. Boulay Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, 960 Carling Ave, Ottawa, Ontario K1A 0C6, Canada. - E-mail: hambletons@em.agr.ca Pyrenophora teres and P. graminea cause two important foliar diseases of barley, net blotch and leaf stripe, respectively. P. teres comprises two pathovars (P. teres f. teres and P. teres f. maculata) differentiated by lesion type
IMC7 Main Congress Theme II: SYSTEMATICS, PHYLOGENY AND EVOLUTION Posters (net blotch and spotted net blotch). Molecular phylogenetic analyses were used to examine species concepts within Pyrenophora. The initial ITS sequence analysis revealed species-specific sequence motifs in the ITS1 region for most species sampled but failed to definitively differentiate among barley isolates at the species level. This result supported prior mating experiments suggesting that P. teres and P. graminea represent one biological species, despite morphological differences, and differing mode of infection and disease symptoms on a single host. Further parsimony analyses were performed using sequence data from three genetic loci for multiple strains. Several isolates were included whose P. teres pathovar identification had been confirmed in inoculation trials on the host and several strains of P. graminea newly isolated from distinctive leaf stripe lesions. Two distinct clusters corresponded to P. teres f. teres and P. graminea, while numerous strains variously identified but including those confirmed as P. teres f. maculata, were intermediate. 677 - Molecular and morphological characterization of a cosmopolitan root endophyte allied to the Leotiomycetes S. Hambleton 1* , L. Sigler 2 & R.S. Currah 3 1 Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, 960 Carling Ave., Ottawa, Ontario K1A 0C6, Canada. - 2 University of Alberta Micorfungus Collection and Herbarium, University of Alberta, Edmonton, Alberta T6G 2E1, Canada. - 3 Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada. - E-mail: hambletons@em.agr.ca Sterile fungi isolated from surface-sterilized roots of the Ericaceae were hypothesized to be conspecific based primarily on restriction fragment length polymorphisms and provisionally named as Variable White Taxon (VWT). In preliminary re-synthesis trials with Vaccinium myrtilloides and V. vitis-idaea, two isolates tested did not form ericoid mycorrhizas. Several isolates of culturally similar fungi were obtained from roots of the Orchidaceae and Pinaceae and suspected of being VWT based on colony morphology and characters of the mycelium. To assess conspecificity and infer their phylogenetic affinities, partial nuclear ribosomal DNA sequences were determined. Parsimony analyses supported a species level distinction for VWT isolates and indicated that the taxon is closely related to, but distinct from, Hymenoscyphus ericae (Leotiomycetes). A new anamorph genus and species is proposed to accommodate this endophyte, which so far has remained sterile in culture, to facilitate information retrieval and discussion and provide a sound foundation for additional experimental work. Strains are identified using a suite of morphological characters in conjunction with ITS sequence data. 678 - Knufia cryptophialidica, close phylogenetic relative of Coniosporium spp. (Ascomycota, incertae sedis) S. Hambleton 1* , A. Tsuneda 2 & K.A. Seifert 1 1 Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, 960 Carling Ave, Ottawa, Ontario K1A 0C6, Canada. - 2 Northern Forestry Centre, Canadian Forest Service, Edmonton, Alberta T6H 3S5, Canada. - Email: hambletons@em.agr.ca When first described, the taxonomic position of Knufia cryptophialidica (monotypic genus, Hyphomycetes), isolated from galls on stems and branches of Populus tremuloides, was hypothesized to be related to the metacapnodiaceous sooty molds. Similar characteristics of the group include slow-growing, black, cerebriform growth on agar, the production of undifferentiated conidiogenous cells on moniliform hyphae, and phialidic conidiogenesis in some species. In a study focused on the identification and phylogenetic placement of a sterile black cerebriform fungus from Sphagnum leaves also suspected of being related to the Metacapnodiaceae, DNA sequences from the nuclear ribosomal RNA gene were determined for 4 strains of Knufia cryptophialidica for comparative purposes. Parsimony analyses indicated that K. cryptophialidica was distant from the sooty molds in the Capnodiales but closely related to Coniosporium apollinis and C. perforans, two species shown previously to form a strongly supported sister clade to the Chaetothyriomycetes. The Coniosporium spp. were isolated from stone and are superficially similar in morphology to K. cryptophialidica, but develop catenate muriform conidia from meristematic conidiophores. 679 - Hawaiian puffballs, earthstars and stinkhorns D.E. Hemmes 1* & D.E. Desjardin 2 1 University of Hawaii at Hilo, Biology Department, 200 W. Kawili St., Hilo, Hawaii 96720, U.S.A. - 2 San Francisco State University, Department of Biology, 1600 Holloway Ave., San Francisco, California 94132, U.S.A. - E-mail: hemmes@hawaii.edu An annotated list of gasteromycetes found in the Hawaiian Islands including members of the Lycoperdaceae, Geastraceae, Nidulariaceae, Tulostomataceae, Phallaceae, Clathraceae, and Sclerodermataceae will be presented from collections taken over the past ten years on all the major islands. Alien habitats such as coastal Casuarina groves, coastal Prosopsis groves, cypress plantings, and hillside Leucaena thickets harbor a number of earthstars and stalked puffballs including Tulostoma and Battarreoides. The native mamane-naio vegetation zones on the leeward sides of the high volcanic mountains are also excellent habitats for xerophytic earthstars, Battarrea, and Tulostoma. Members of the Phallaceae including Dictyophora, Mutinus, Pseudocolus, and Phallus are found in agricultural and horticultural settings whereas Aseroë rubra, along with various species of Scleroderma are Book of Abstracts 205
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Cavernularia: 356 Cenococcum: 500,
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Order Index Agaricales: 40, 50, 51,
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