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Title: TRICHODERMA ASPERELLUM, A NEW SPECIES WITH WARTED CONIDIA, AND REDESCRIPTION T. VIRIDE

Author
item Samuels, Gary
item LIECKFELDT, ELKE - GERMANY
item NIRENBERG, HELGARD - GERMANY

Submitted to: Sydowia
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/27/1999
Publication Date: N/A
Citation: N/A

Interpretive Summary: The development of management strategies to control fungal diseases through the use of biological control agents as well as the search for more effective industrial enzymes are hindered by lack of knowledge about species in the genus Trichoderma and its sexual state, Hypocrea. The type species of the genus Trichoderma, T. viride, has been confused. Recent evidence suggests that two different species have been called T. viride, one of which is the asexual state of Hypocrea rufa, and the other is an undescribed species. In this paper the "real" T. viride is redescribed and the other species is described and given a new name. The distinction between these species is clarified. These results will be useful to agricultural scientist who need to accurately identify these fungi as well as to scientists working on the development of novel agents for the biological control of disease-causing fungi.

Technical Abstract: The new species Trichoderma asperellum is distinguished from T. viride by finer conidial ornamentation, slightly ovoidal conidia, a faster growth rate, mostly paired branches, ampulliform phialides, and consistent presence of chlamydospores. Trichoderma asperellum cannot be unequivocally linked to a teleomorph. The teleomorph of T. viride is Hypocrea rufa. A key to Trichoderma and Hypocrea species with warted or roughened conidia i presented.