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IMC7 Main Congress Theme II: SYSTEMATICS, PHYLOGENY AND EVOLUTION Posters Considerable progress has been made in the elucidation and stabilization of the concepts of Families, Orders and Classes of Pyenomycetes as reflected in Systema Ascomycetum and The Dictionary of the Fungi. From Systema Ascomycetum 2001, the Class Dothidiomycetes encompasses 7 Orders: Capnodiales (4 Families), Dothideales (4), Hysteriales (2), Myriangiales (2), Patellariales (1) and Pleosporales (19). These are ultimately based on the type species of 32 genera. The Class Chaetothyriomycetes has one recognized Order, Chaetothyriales, with two families plus Rhynchostomataceae without an assigned Order and Glyphium not formally assigned to either Family or Order. These ultimately are based on 4 species. Forty-three Families are provisionally assigned to Dothidiomycetes / Chaetothyriomycetes based on 43 generotype species. For 79 genera, details are provided on the choice of the type species and the protologue of the type specimen in the hope that future work will focus first on these fundamental species rather than those chosen based on easy availability from culture collections. 762 - Basidiome development as a genus level character in some species of Dacrymycetales from Mexico S. Sierra-Galván 1* , J. Cifuentes 1 & J. Marquéz-Guzmán 2 1 Herbario, FCME, Fac. de Ciencias UNAM, A.P. 70-399 Coyoacán C.P. 04510 México, D.F., Mexico. - 2 Desarrollo en plantas, Fac. de Ciencias, UNAM, A.P. 70-399 Coyoacán C.P. 04510 México, D.F., Mexico. - E-mail: ssg@hp.fciencias.unam.mx The order Dacrymycetales was established by Lindau (1897), grouping genera included in the family Dacrymycetaceae by Brefeld (1888) such as Calocera, Dacrymyces, Dacryomitra and Guepinia. Subsequently, other classifications have been proposed, those of Coker (1920), Neuhoff (1936), Brasfield (1938), Kobayasi (1939), Martin (1952), and more recently, Lowy (1971), McNabb in the 60's, Reid (1974) and Oberwinkler (1994). One of the commonly debated topic among these works is the number of recognized genera, since some authors accept 11 genera, whereas others recognize only 2. Jülich (1981) established the monotypic family Cerinomycetaceae for Cerinomyces. In Mexico this group has been partially studied (Lowy, 1968; 1971; 1983; Sierra, 1992; 1993; 1995; 2000), for this reason the main objectives in the undergoing research of the senior author is to monograph the order at the national level and to apply new characters to its systematic. In order to contribute to clarify genera delimitation basidiome development was studied in 9 species belonging to 5 genera. The methodology proposed by Kennedy (1972) was used with modifications in the fixation (FAA), staining (PAS, saffranin-fast green, toluidin blue, etc.) and infiltrating material (Paraplast). 230 Book of Abstracts 763 - Two new phytoparasitic forms of hyphomycete genus Mycovellosiella causing foliar spots from India R.K. Singh 1 , R.N. Kharwar 1 & S. Narayan 2* 1 Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi-221005, U.P., India. - 2 Dept. of Botany, D.D.U., University of Gorakhpur, Gorakhpur- 273009, India. The foliicolous hyphomycete genus Mycovellosiella is now well established and defined genus of over 150 species till date. Many species of the genus were earlier placed under other genera like Cercospora, Cercosporella, Cladosporium, Phaeoramularia, Ramularia and Stenella etc. Mycovellosiella can be characterised by its superficial secondry mycelium forming prostrate and procumbent hyphae and forming rope-like structures often ascending the leaf hairs, and micronematous to semimacronematous conidiophores. Thus fungus produces phragmosporic and catenate conidia in simple or branched chains with prominent hila. Mycovellosiella produces leaf-spot diseases ranging from discolouration to necrosis of the leaf tissues. In continuation of the earlier additions from this region, the present communication is devoted to the description and illustrations of two new species of Mycovellosiella viz., M. aegli sp. nov. and M. terminalae sp. nov. occuring on leaves of Aegle marmelos (Rutaceae) and Terminalea arjuna (Combritaceae) respectively. The concerned materials have been deposited in H.C.I.O., New Delhi, India. These species have been compared with their allied or similar taxa to justify its separate identity. The scrapmounts have been prepared in lactofuchsin and glycerine separately to observe these structures, under different magnifications of compound microscope. 764 - Fusarium commune, a new species within the Gibberella clade identified by morphological and molecular phylogenetic data K. Skovgaard 1* , K. O'Donnell 2 , H.I. Nirenberg 3 & S. Rosendahl 1 1 Department of Mycology, University of Copenhagen, Oester Farimagsgade 2D, 1353 Copenhagen K, Denmark. - 2 Microbial Properties Research Unit, National Center for Agricultural Utilization Research, U.S. Department of Agriculture, Agricultural Research Service, 1815 North University Street, Peoria, IL., U.S.A. - 3 Institut für Pflanzenvirologie, Mikrobiologie und biologische Sicherheit, Biologische Bundesanstalt für Land- und Forstwirtschaft, Koenigin-Luise-Strasse 19, 14195 Berlin, Germany. - E-mail: kerstins@bot.ku.dk Fusarium commune sp. nov. was isolated from soil and Pisum sativum in Denmark and several geographically widespread locations within the northern hemisphere from diverse substrates including white pine, Douglas fir, carnation, corn, carrot, barley and soil. Fusarium commune is characterised by and distinguished from its putative
IMC7 Main Congress Theme II: SYSTEMATICS, PHYLOGENY AND EVOLUTION Posters sister taxon, the F. oxysporum complex, in having long, slender monophialides and polyphialides when cultured in complete darkness. Based on the combined DNA sequence data from translation elongation factor and the mitochondrial small subunit ribosomal DNA, the fifteen isolates of F. commune analysed formed a strongly supported clade closely related to but independent of the F. oxysporum and the Gibberella fujikuroi species complexes. 765 - Identifying species in the genus Botryosphaeria B. Slippers 1* , T.A. Coutinho 1 , B.D. Wingfield 2 , P.W. Crous 3 & M.J. Wingfield 1 1 Forestry and Agricultural Biotechnology Insititute (FABI), Dept of Microbiology and Plant Pathology, University of 2 Pretoria, Pretoria, South Africa. - Forestry and Agricultural Biotechnology Insititute (FABI), Dept of Genetics, University of Pretoria, Pretoria, South Africa. - 3 Centraalbureau voor Schimmelcultures (CBS), Uppsalalaan 8, 3584 CT Utrecht, The Netherlands. - Email: bernard.slippers@fabi.up.ac.za Botryosphaeria species are common endophytes and opportunistic pathogens of woody hosts, world-wide. Approximately 150 Botryosphaeria species have been described, but their taxonomy is often confused due to limited morphological variation and the wide host range of some species. Recent studies have successfully combined rDNA sequence and morphological data to define and describe species. These characters, however, need to be evaluated for their use in defining species boundaries between closely related species and species complexes. In this study, we combined sequence and PCR-RFLP data from the ITS rDNA, β-tubulin and elongation factor-1-α, with traditional morphological and ecological criteria, to delimit various Botryosphaeria spp. The ITS region was sufficiently variable to distinguish all species groups. However, some closely related species such as B. ribis and B. parva could not be separated. Combined data sets of the three sequenced regions, however, clearly separated the different species. Morphological characters were found to be variable in nature. But under controlled laboratory conditions, conidial and cultural morphology could be used to recognise most species. Ecological data were also useful in defining taxa, as many species are restricted to a particular host or environment. The combination of morphology, habitat data and DNA sequences produced a reliable basis for the characterisation of Botryosphaeria spp., both at the phylogenetic and diagnostic levels. 766 - Phylogenetic position of the Caloplaca aurantia group U. Søchting 1 & U. Arup 2* 1 Dept. of Mycology, Botanical Institute, University of Copenhagen, O. Farimagsgade 2D, DK-1353 Copenhagen K, Denmark. - 2 Institute of Systematic Botany, Lund University, Ö. Vallgatan 18, SE-223 61 Lund, Sweden. - Email: ulf.arup@sysbot.lu.se The Caloplaca aurantia group, consisting of the species C. aurantia, C. flavescens and C. thallincola, was formerly included in the subgenus Gasparrinia, but is distinguished from most other Gasparrinia's by having more or less citriform spores. Based on molecular data a phylogenetic hypothesis is presented, which places the Caloplaca aurantia group apart from most species in Caloplaca subgenus Gasparrinia, but close to the Caloplaca velana group. 767 - Characterization of Fusarium proliferatum (Matsushima) Nirenberg, the causal agent of bakanae disease of rice P. Sontirat 1* , P. Aranyanart 2 & S. Hiranpradit 3 1 Mycology Group, Plant Pathology and Microbiology Division, Department of Agriculture, Paholyothin Road, Jatujak, Bangkok 10900, Thailand. - 2 Rice Pathology Research Group, Plant Pathology and Microbiology Division, Department of Agriculture, Paholyothin Road, Jatujak, Bangkok 10900, Thailand. - 3 Applied Microbiology Group, Plant Pathology and Microbiology Division, Department of Agriculture, Paholyothin Road, Jatujak, Bangkok 10900, Thailand. - E-mail: wantanee@doa.go.th Sixty-four samples of bakanae disease of rice were collected from different locations in Thailand during the years 1997-2000. Cultural and morphological characteristics of 38 isolates were studied and examined scrutinizedly using Nelson et al. (1983)'s methods. The result revealed that both cultural and morphological appearances of all isolates were identical and identified as F. proliferatum (Matsushima) Nirenberg, when considering the production of polyphialides. Colonies on PDA floccose, white when young, and became pinkish orange to reddish or bluish purple when old (7-14 days ). Culture were often tinged with light blue; reverse pale orange to light or dark blue. Some isolates showed blue spots of sclerotia. On CLA, microconidia were abundant, formed in chains of varying length and in false heads on monophialides and polyphialides which often appeared in 'V' shape. They are primary single cells, oval to club-shaped with flattened base, 6.5 - 11.6 × 2.1 - 3.4 µm. Macroconidia were abundant, produced from monophialides on branched conidiophores in sporodochia, hyaline, slightly sickleshaped to almost straight with basal and ventral surfaces parallel. The walls were thin and the basal cells were foot- Book of Abstracts 231
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Cavernularia: 356 Cenococcum: 500,
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Vukojevic, J.: 363 Vurro, M.: 116 V
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