稻瘟菌诱导的广谱抗性

Induced Broad-spectrum Resistance by Rice Blast

以稻瘟弱致病菌对关东51、爱知旭、新2号作诱导接种,又用稻瘟强致病菌、稻胡麻叶斑菌、稻白叶枯病菌进行挑战接种,水稻均获得对这3种病害的诱导抗性。又以稻胡麻叶斑菌为诱导因子,也同样使水稻表现了不同程度的抗瘟性。

To screen weak or strong pathogenic isolates to different varieties, total 68 single-spore isolates of Magnaporthe grisea, from rice mixture or monoture in Shiping, Gejiu and Jianshui County of Yunnan Province, were inoculated on 7 Chinese and 8 Japanese identification varieties respectively. At first, Guandong 51, Aizhixu, and Xin No.2 were inoculated with corresponding weak pathogenic isolates individually as 'inducing inoculation', then with corresponding compatible Magnaporthe grisea, Bipolaris oryzae or Xanthomonas oryzae isolates, respectively, as 'challenge inoculation'. At the same time, the three varieties were inoculated with Bipolaris oryzae isolate individually as 'inducing inoculation', then with corresponding compatible Magnaporthe grisea isolates, respectively, as 'challenge inoculation'. The result showed that the three varieties had induced resistance with the three diseases at some levels.