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经电镜观察发现在豆瓣绿病叶叶脉韧皮部筛管细胞中有多形态的MLO,初步认为该病害是由类菌原体侵染所致。
Morphology observation showed that MLO was found in the screen cells of phloem phloem of bean leaf veins, which was preliminarily thought to be caused by mycoplasma infection.