Ultrastructure of the ascospore formation of Arthroderma simii. 1998

H Ito, and H Hanyaku, and T Harada, and T Mochizuki, and S Tanaka
Department of Dermatology, Tokyo Women's Medical College, Daini Hospital, Japan.

Ascospore formation of Arthroderma simii was observed using electron microscopy. Using scanning electron microscopy, many round asci were observed inside the gymnothecia obtained by 4 weeks of incubation after mating. Ascospores were produced inside the asci, then discoid-shaped mature ascospores were observed through the degenerate and disrupted ascus cell wall. Disseminated ascospores were observed outside the gymnothecium 7 weeks after inoculation. Using transmission electron microscopy, the enveloping membrane system of two unit membranes invaginated and delimited the cytoplasm. The inner membranes were found to have changed into ascospore plasma membranes, whereas the outer membranes and intercisternal space were changed into ascus cell wall. The subcellular events of ascospore formation were found to be essentially similar to those of other dermatophytes.

UI MeSH Term Description Entries
D008855 Microscopy, Electron, Scanning Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY. Scanning Electron Microscopy,Electron Scanning Microscopy,Electron Microscopies, Scanning,Electron Microscopy, Scanning,Electron Scanning Microscopies,Microscopies, Electron Scanning,Microscopies, Scanning Electron,Microscopy, Electron Scanning,Microscopy, Scanning Electron,Scanning Electron Microscopies,Scanning Microscopies, Electron,Scanning Microscopy, Electron
D001203 Ascomycota A phylum of fungi which have cross-walls or septa in the mycelium. The perfect state is characterized by the formation of a saclike cell (ascus) containing ascospores. Most pathogenic fungi with a known perfect state belong to this phylum. Ascomycetes,Cochliobolus,Sclerotinia,Ascomycete,Ascomycotas,Sclerotinias
D013172 Spores, Fungal Reproductive bodies produced by fungi. Conidia,Fungal Spores,Conidium,Fungal Spore,Spore, Fungal

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