稻瘟病菌致病毒素对野败型不育细胞质氧化活性的影响

Effect of Toxins from P. oryzae 90 2 Strain to Oxidative Activity of Wild Abortive Male sterile Cytoplasm in Rice

以水稻 同核异 质野败型 雄 性 不育 系 珍汕 ９７ Ａ 及 其保 持 系 珍汕 ９７ Ｂ 为 材料 ，用 稻 瘟 病菌９０２ 菌株 产生的致 病粗毒素 浸养 处理 二叶 期 黄化 幼 苗，以 探讨 专 化 性致 病 菌株 稻 瘟 病菌 ９０２ 致病粗毒 素对野败 型雄性 不育细胞 质呼吸的 专化性 抑制作用 。结果表 明，稻瘟 病菌９０２ 菌株粗 毒素对珍汕 ９７ Ａ、９７ Ｂ 呼 吸作用的 影响有差 异，珍汕 ９７ Ａ 的呼 吸作 用对 毒素 处理 更敏 感，受 抑制 强 于珍汕９７ Ｂ。并且 ，未处理的 珍汕９７ Ｂ 匀浆液的 呼吸强 度一直高 于珍汕 ９７ Ａ，提 示同核异 质的保持 系珍汕９７ Ｂ 比 不育系 珍汕９７ Ａ 细 胞质质量 在呼吸 方面也较 优。

Wild abortive cytoplasmic male sterile line Zhenshan 97A and its maintainer Zhenshan 97B were used as experimental materials, their yellowing seedling was treated soakedly by toxins from P. oryzae 90 2 strain. After the treatment, their homogenized suspension dynamic changements of oxidative activity were detected so as to understand specific inhibition of the toxins to respiratory system of WA cytoplasm. The result showed that the effect of toxins from P. oryzae 90 2 to respiration was different between Zhenshan 97A and Zhenshan 97B. The respiration of Zhenshan 97A was more susceptibility to the toxins and was inhibited greater than that of Zhenshan 97B. Moreover, the control respiratory intensity of Zhenshan 97B was always higher than Zhenshan 97A. This suggested that cytoplasmic character of Zhenshan 97B in respiration was better than that of Zhenshan 97A.