 Phylum：Oomycota >> Class： Oomycetes >> Order： Leptomitales |
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 BCRC Number： |
NO BCRC Number! | |||
| Scientific Name： |
Aphanomyces cladogamus | |||
| Author： |
Aphanomyces cladogamus Drechsler. J. Agric. Res., 38: 335. figs. 5-7. 1929. |
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| Description： |
Hyphae 3.5-10μ in diameter. Zoosporangia not tapering markedly toward the apex of vegetative hyphae, and with numerous lateral branches of variable length. Primary zoospores elongated, encysting preemergence at the orifice. Primary zoospore cysts 7-10μ in diameter, discharge period, and the abnormal development of them to form mycelia being observed. Oogonia terminal on lateral branches of variable length, spherical, 19-33μ in diameter, wall irregularly thick with a smooth outer surface and a sinuous inner contour but not pronounced. Oospore hyaline to yellow, 13.5-25.6μ in diameter, thick walled, contents granular with a large central oil globule; long oogonial stalk may winding about the antheridial filament. Antheridia 2-3 in number; wrapping extensively about the oogonium. Antheridial stalk long, branched; monoclinous, diclinous, or androgynous in origin. Fertilization tubes short. Germination of the oospore not observed. | |||
| Specimens： |
Collected several isolates from soil samples. (Aug. 21, 1974. Taipei;garden soil) |
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| Habitat： |
Soil and water | |||
| Distribution： |
USA |
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| References： |
Drechsler C. 1929. |
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| Provided： |
T. S. Chiou and H. S. Chang |
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| Note： |
A. cladogamus was isolated and decribed from the infested roots of leguminous crops in western countries. In Taiwan it seems widespread in soils and can be baited by snake skin or hempseed. The oospore under high magnification oil lens light microscopy revealed a very resemble oospore internal structure with Aposachlya brachynema, Leptomitaceae. | |||