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在我国文献中广西云南玉米霜霉病菌名称为Peronosclerospora maydis(Racib.)C.G.Shaw。但是我们观测病菌孢子囊为长椭球形;在13℃—28℃产孢温度范围内,随温度升高孢子囊长度增加而宽度基本不变,表明它不是P.maydis,而是P.sacchari(T.Miyake)Shirai &.K.Hara,或P.philippinensis(Weston)C.G.Shaw。以四种Peronosclerospora的DNA及广西云南病菌的DNA与探针pCL.Y83杂交的RFLP图谱进一步证实了此结果,并表明P.sacchari与P.philippinensis为同种异名。因此我国广西云南玉米霜霉菌名称应为Peronosclerospora sacchari(T.Miyake)Shirai & K.Hara,现予订正。
In our literature, the name of the downy mildew of corn in Yunnan Province in Guangxi is Peronosclerospora maydis (Racib.) C.G.Shaw. However, we observed that the sporocysts of the pathogen were oval spheroids. In the sporulation temperature range of 13 ℃ -28 ℃, the sporangia length increased with the increase of temperature and the width was almost unchanged, indicating that it was not P.maydis but P.sacchari ( T. Miyake) Shirai & K. Hara, or P. philippinensis (Weston) CG Shaw. This result was further confirmed by RFLP patterns of DNA from four species of Peronosclerospora and DNA from the Yunnan Yunnan germ and probe pCL.Y83 and showed that P.sacchari and P. philippinensis are synonymous. Therefore, the name of our country in Guangxi Yunnan Yunnan downy mildew should be Peronosclerospora sacchari (T. Miyake) Shirai & K.Hara, is revised.