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Abstract
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.
This work was supported partly by Hungarian Science Foundation Grant OTKA T032690 and Hungarian Ministry of Education Grant FKFP 516/1999 to GS and Austrian Science Fund grants P-12748-MOB and FWF P-16601 to CPK. The authors are grateful to Professor Gary Harman (Cornell University, Geneva, New York), Dr Mette Lübeck (The Royal Veterinary and Agricultural University, Frederiksberg, Denmark) and Dr Martha Christensen (University of Wyoming, Laramie, Wyoming) for the gift of Trichoderma isolates and to Dr Sergio Orduz and Lilliana Hoyos (Corporación para Investigaciones Biológicas, Medellín, Colombia) for permission to publish ITS 1 and 2 and tef1 sequence data for the Colombian isolate of T. brevicompactum. The authors also thank Carol Ann Nolan, Maria Voloaca and Greg Chang for their contributions to the physiological and molecular studies undertaken at ECORC.PUBLICation No. 2003-370 of the Eastern Cereal and Oilseed Research Centre.