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Mycoparasitism of Coemansia species

Published online by Cambridge University Press:  01 July 1999

H. KWAŚNA ,
W. A. J. M. DAWSON  and
G. L. BATEMAN
H. KWAŚNA
Affiliation:
Department of Forest Pathology, Agricultural University, ul. Wojska Polskiego 71c, 60-625 Poznań, Poland
W. A. J. M. DAWSON
Affiliation:
IACR-Rothamsted, Harpenden, Hertfordshire AL5 2JQ, U.K.
G. L. BATEMAN
Affiliation:
IACR-Rothamsted, Harpenden, Hertfordshire AL5 2JQ, U.K.
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Abstract

The mode of hyphal interaction and parasitism of Coemansia spp., mainly C. aciculifera and C. thaxteri, by Gliocladium roseum, Fusarium flocciferum and Verticillium psalliotae, species that occurred with the Coemansia spp. in wheat rhizospheres, was observed in mixed cultures on low nutrient medium. Two types of interaction occurred. G. roseum and F. flocciferum coiled round, penetrated and grew within the host's hyphae. V. psalliotae grew parallel to and along the host's hyphae, coiling only rarely, and sometimes formed thick mycelial layers on the host's sporangiophores. After infection by each fungus, the host's hyphae became narrower, collapsed and then disintegrated. The observations suggest parasitism followed by lysis rather than the involvement of antibiotics.

Type
Research Article
Information
Mycological Research , Volume 103 , Issue 7 , July 1999 , pp. 925 - 928
Copyright
© The British Mycological Society 1999

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