【摘要】 玉米弯孢菌叶斑病菌［Curvularialunata（Wakker）Boed．］侵染不同抗性品种后，寄主叶片防御酶系和PR蛋白活性的变化及叶片汁液对病菌孢子萌发有影响，研究发现：PAL，PO，SOD和β-1，3-葡聚精酶在对弯孢菌叶斑病的抗性中起到一定的作用，尤其是PR蛋白β-1，3-葡聚糖酶活性在抗性机制中发挥更为重要的作用。木质素可能是在病菌侵染初期发挥抗侵入的作用。抗病品种叶片汁液可能含有抑菌物质，病菌侵染有利于刺激这种物质抑菌作用的提高，在抗病品种中更为明显。更多还原

【Abstract】 It was found that the significant activity changes of defensive enzymes and PR were showed in infected maize varieties with different resistance to Curvularia lunata leaf spot, and host leaf extract from resistant varieties could influence germination of pathogen SPore much mere than that from susceptible ones. Results suggested that there was a certain role of defensive enzyme involving PAL, PO, SOD and β-1, 3-glucanase in the resistant mechanism against the disease, especially the last enzyme was considered to be mere important in the resistance. Lignin nay be as an important barrier against pathogen penetration at the initial infection period. The extract .from the resistant plant leaf was presumed to contain some inhibitory substances against pathogen spore germination, and pathogen infection may stimulate the increase of the substances, the phenomenon was mere remarkable in the resistant varieties.更多还原