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黑龙江水稻胡麻叶斑病病原菌的分离鉴定及生物学特性

Siqi Feng,Yaling Zhang

China Plant Protection（2019）

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Abstract
对水稻胡麻叶斑病病原菌进行了分离和形态学观察结果表明,其分生孢子呈褐色,直立或弯曲,脐部稍突出,表面光滑,纺锤形或圆柱形,有5～10个假隔膜;分生孢子梗褐色,弯曲,部分有分枝.分子鉴定得出病原菌ITS区序列与稻平脐蠕孢有性态(Cochliobolus miyabeanus)序列相似程度达到99％.确定该病原菌为稻平脐蠕孢(Bipolaris oryzae).其生物学特性研究结果表明,水稻胡麻叶斑病病原菌生长最适条件为光暗交替、酸碱度中性、25℃、碳氮源为可溶性淀粉和甘氨酸.
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