摘要： 以水稻同核异质野败型雄性不育系珍汕97A及其保持系珍汕97B为材料，用稻瘟病菌902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902菌株粗毒素对珍汕97A、97B呼吸作用的影响有差异，珍汕97A的呼吸作用对毒素处理更敏感，受抑制强于珍汕97B.并且，未处理的珍汕97B匀浆液的呼吸强度一直高于珍汕97A，提示同核异质的保持系珍汕97B比不育系珍汕97A细胞质质量在呼吸方面也较优。

关键词: 水稻, 雄性不育细胞质, 稻瘟病菌, 致病毒素, 氧化活性

Abstract: 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 902 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.

Key words: Rice, Male sterile cytoplasm, P. oryzae toxins, Oxidative activity