以“左山一”和“双丰”的1年生扦插苗为试材,利用快速叶绿素荧光诱导动力学曲线分析技术,研究了山葡萄叶片被霜霉病菌侵染后的光系统活性,以深入研究霜霉病对山葡萄影响的生理机理。结果表明:山葡萄叶片感病后,随着时间的延长,相对可变荧光在J点和I点的值Vj和Vi逐渐上升,电子传递受体侧受到伤害,不同品种间对霜霉病的抗性也存在差异,“左山一”较“双丰”更抗病。 Using 1-year-old cuttings of “Zuosiyi” and “Shuangfeng” as test materials, the rapid chlorophyll fluorescence-induced kinetic curve analysis technique was used to study the photosystem activity of S. gramineus leaves infected with downy mildew In order to further study the physiological mechanism of downy mildew on grapevine. The results showed that the Vj and Vi of relative variable fluorescence gradually increased at J point and I point with the increase of time, and the electron transport receptor side was harmed. The resistance to downy mildew in different varieties There are also differences in sex, “left one ” more “Double Happiness ” more disease-resistant.