反复通过寄主对水稻白叶枯病菌致病力和生化性状的影响

• 作 者: 张红生 许志刚 方中达
• 机 构: 南京农业大学植物病理教研组,南京农业大学植物病理教研组,南京农业大学植物病理教研组
• 出 处: 南京农业大学学报
• 发表日期: 1987年04期
• 关键词: 致病力 生化性 胞外粘多糖 水稻白叶枯病菌 反复通过寄主 寄主 致病力变异 蛋白酶活性 变异 抗性

把致病力强弱不同的四株水稻白叶枯病菌反复接种在两个抗性不同的水稻品种上,测定比较了反复接种12代后的菌种和原始冻干菌株的致病力与若干生化性状。致病力弱的菌株经反复接种后致病能力增强,致病力强的菌株经反复接种后,致病力逐渐减弱;病菌的胞外粘多糖量和蛋白酶活性的变化趋势与致病力的变异相一致,但菌的生长速度和胞外纤维素酶活性的变异无明显规律。本文还讨论了寄主抗性的遗传背景对病菌变异的影响。

The pathogenicity of four different bacterial blight bacterial blight repeated inoculation of two different resistant varieties of rice to measure the repeated after 12 generations of strains compared with the virulence of the original lyophilized strains and a number of Biochemical traits. After repeated inoculation, the pathogenicity of the weak virulent strains was enhanced, and the pathogenicity of the weak virulent strains was weakened after repeated inoculation. The change tendency of extracellular mucopolysaccharide and protease activity and the pathogenicity Variation was consistent, but the growth rate of bacteria and extracellular cellulase activity variation was not obvious. This article also discusses the genetic background of host resistance on the impact of pathogen variation.