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United States Department of Agriculture

Agricultural Research Service

Title: Three Species of Hypocrea with Stipitate Stromata and Trichoderma Anamorphs

Authors
item Samuels, Gary
item Lodge, D - USDA, FOREST SERVICE

Submitted to: Mycologia
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: October 31, 1995
Publication Date: N/A

Interpretive Summary: Fungi have untapped potential as biological control agents in sustainable agricultural systems, yet their use is hindered by lack of systematic knowledge. Many biocontrol fungi belong in the genus Trichoderma; this is a fungus that reproduces primarily asexually and thus cannot be readily improved to fight crop diseases. This paper described several newly discovered, potential biocontrol agents that can be improved in the laboratory because they undergo sexual reproduction. Three species are described and illustrated as both sexual and asexually reproducing fungi. Those searching for novel genetic resources with potential to serve as biological control agents will use these results to reduce the use of chemical fungicides in crop production.

Technical Abstract: Hypocrea brevipes, H. poronoidea and the new species H. capitata were grown in pure culture from individual part ascospores. Each produced a Trichoderma anamorph, but none were referable to any of the names Trichoderma aggregate species. Stromata with fertile ascospores formed in cultures derived from single part ascospores of H. poronoidea. In addition, a hyphomycetous, Acremonium-like, synanamorph with hyaline conidia borne in slime formed in cultures of H. poronoidea. These Hypocrea species and their anamorphs are described.

Last Modified: 7/30/2014
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