Ultrastructure of the pseudo-cleistothecia produced by the Trichophyton mentagrophytes complex.
The internal structure and the formation processes of pseudo-cleistothecia in Arthroderma vanbreuseghemii, a member of the Trichophyton mentagrophytes complex, were observed by light and electron microscopy. The structure of pseudo-cleistothecia, obtained by single spore culture of A. vanbreuseghemii, developed as a clump of hyphae producing microconidia which increased gradually in size. Echinulations appeared on the surrounding hyphae, which developed into peridial hyphae with characteristic constrictions. These pseudo-cleistothecia contained the microconidia. During the mating of A. vanbreuseghemii and Arthroderma simii, pseudo-cleistothecia structures developed from organs similar to the gametangia. These pseudo-cleistothecia contained interwoven hyphae but no microconidia.
Department of Dermatology, Shiga University of Medical Science, Otsu, Japan.
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Saito
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Tanaka
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Watanabe
D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D013172:Spores, Fungal; D014249:Trichophyton / Q000254:growth & development / Q000648:ultrastructure*