pathogenicity defective mutant
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A white colony mutant, 1-40-271, was normal in sporulation and spore germination, but defective in appressorium development and totally lost in pathogenicity.
突变体1-40-271菌落呈白色，产孢与萌发均正常，但萌发后即便在人工疏水表面上也不能形成附着胞，且丧失了致病性；
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