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Trichoderma brevicompactum sp. nov.

     Austrian Center of Biological Resources and Applied Mycology (ACBR), Institute of Applied Microbiology (IAM), University of Agricultural Sciences, Nußdorfer Lände 11, A-1190 Wien, Austria

Irina Druzhinina ¹

     Research Area of Gene Technology and Applied Biochemistry (DGTAB), Institute of Chemical Engineering, University of Technology, Getreidemarkt 9/1665, A-1060 Wien, Austria

Walter Gams

     Centraalbureau voor Schimmelcultures, P.O. Box 85167, 3506 AD Utrecht, The Netherlands

John Bissett

     Agriculture and Agri-Food Canada, Eastern Cereal and Oilseed Research Center, Central Experimental Farm, Ottawa, Ontario, K1A 0C6

Doustmorad Zafari

     Department of Plant Protection, Bu Ali Sina University, Hamadan, Iran

George Szakacs

     Department of Agricultural Chemical Technology, Technical University of Budapest, 1111 Budapest, Gellert ter 4, Hungary

Alexei Koptchinski

     Research Area of Gene Technology and Applied Biochemistry (DGTAB), Institute of Chemical Engineering, University of Technology, Getreidemarkt 9/1665, A-1060 Wien, Austria

Hansjörg Prillinger

     Austrian Center of Biological Resources and Applied Mycology (ACBR), Institute of Applied Microbiology (IAM), University of Agricultural Sciences, Nußdorfer Lände 11, A-1190 Wien, Austria

Rasoul Zare

     Department of Botany, Plant Pests Diseases Research Institute, PO Box 1454, Tehran, Iran

Christian P. Kubicek ²

     Research Area of Gene Technology and Applied Biochemistry (DGTAB), Institute of Chemical Engineering, University of Technology, Getreidemarkt 9/1665, A-1060 Wien, Austria

Trichoderma brevicompactum, a new species, was isolated from soil or tree bark in North, Central and South America, including the Caribbean Islands, and southwestern and southeastern Asia. Morphological and physiological characters, the internal transcribed spacer regions of the rDNA cluster (ITS1-5.8SrDNA-ITS2) and partial sequences of translation elongation factor 1-alpha (tef1) are described. Trichoderma brevicompactum is characterized by a pachybasium-type morphology, morphologically resembling other small-spored species referable to Trichoderma section Pachybasium but with essentially subglobose conidia. It is most closely related phylogenetically to Hypocrea lutea, from which it differs in morphological and physiological characters.

Key words: Biolog, Hypocrea, molecular phylogeny, Pachybasium, soil mycoflora, taxonomy, Trichoderma

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