Journal
MYCOLOGICAL RESEARCH
Volume 113, Issue -, Pages 1172-1180Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mycres.2009.07.018
Keywords
Biotrophic mycoparasite; Fungal systematics; Fusarium; Melanosporales; Sphaerodes
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Funding
- Natural Sciences and Engineering Research Council of Canada Discovery Grant
- Saskatchewan Agriculture Development Fund
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A new species, Sphaerodes mycoparasitica (Ascomycetes, Melanosporales), was isolated from isolates of Fusarium averiaceum and Fusarium graminearum originating from wheat fields in Saskatchewan, and from Fusarium oxysporum originating from asparagus fields in Quebec, Canada. The species is characterized by a unique combination of ascospore size, shape (fusiform and triangular) and wall ornamentation (reticulate and smooth). Also, conidia are produced from simple phialides on the surface of ascoma peridial wall, on ascoma surrounding hyphae, and on irregularly branched conidiophores arising from hyphae. The closest relation of S. mycoparasitica is Sphaerodes quadrangularis, which has no detected anamorphic stage. The description of S. mycoparasitica, its phylogenetic position-based on DNA sequences of large subunit ribosomal RNA gene (LSU)-as well as a key for all known Sphaerodes species are provided. (C) 2009 The British Mycological Society. Published by Elsevier Ltd. All rights reserved.
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