 Phylum：Oomycota >> Class： Oomycetes >> Order： Pythiales |
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 BCRC Number： |
NO BCRC Number! | |||
| Scientific Name： |
Pythium irregulare | |||
| Author： |
Pythium irregulare Buisman, Med. Phytopath. Lab. 11: 38, 1927. |
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| Description： |
Hyphae measuring 2 to 8 μ in diameter. Sporangia of various shapes, spherical, subspherical, obvate to pyriform, terminal or intercalary, measuring 11-31 μ, mostly 18-24 μ in diameter, forming zoospores in vesicles or germinating directly as conidia. Oogonia spherical or subspherical, varying in shapes, terminal or intercalary, oogonia wall smooth or with one to several irregular projections which may or may not be cut off by a cross wall, measuring 11 to 27 μ in diameter without projection. Antheridia 1 to 3 , usually only one, monoclinous or diclinous (typically monoclinous). Oospores aplerotic, spherical, smooth, measuring 9 to 24 μ in diameter, oospore wall about 1.5 μ thick. | |||
| Specimens： |
garden soil and orchard soil. |
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| Habitat： |
null | |||
| Distribution： |
Taiwan |
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| References： |
Hsieh, H. J. and Chang, H. S., 1976. |
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| Provided： |
H. J. Hsieh |
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| Note： |
The sporangia of Pythium irregulare vary in shape from spherical to subspherical, elliptical to ovoid, pyriform to truncate. The oogonial walls are smooth or irregularlyechinulate. When oogonial wall are echinulate, the spines are 1 to numerous, of irregularlengths, of irregular shapes and irregularly arranged on the oogonia. According to thesecharacteristics, we can distinguish this species from other related species. | |||