本文利用ＳＯＤ聚丙烯酰胺凝胶电泳对灰斑病１号、７号小种侵染条件下，大豆类囊体膜蛋白的表达进行分析，提出了灰斑病１号小种主要是使感病大豆品种叶肉细胞叶绿体膜蛋白受到损伤，然后使植株发病。灰斑病７号小种对大豆的影响主要作用于细胞色素的表达上，使细胞色素不能合成，从而表现出感病反应。而抗病品种则无此反应。 In this paper, SOD polyacrylamide gel electrophoresis of gray spot disease No. 1, No. 7 under the conditions of infection of soybean thylakoid membrane protein expression analysis, proposed Gray Cercaria 1 race is mainly susceptible Soybean mesophyll cell chloroplast membrane protein damage, and then make the plant disease. The effects of Gray Spot 7 races on soybean are mainly on the expression of cytochrome, which can not synthesize cytochromes and thus show a susceptible response. The resistant varieties did not respond.