膜脂组成和膜结合酶活性与玉米幼苗抗冷性的关系  

The Relationship Among Membrane Lipids Membrane Linked Enzymes and Maize Cold-Resistance

作　　者：李俊明[1] 张敬贤[1] 崔四平[1] 魏建昆[1] 张海明[2] 耿庆汉 

机构地区：[1]河北省农林科学院理化所,石家庄050051 [2]内蒙古农牧学院,呼和浩特010018

出　　处：《华北农学报》1992年第3期50-53,共4页Acta Agriculturae Boreali-Sinica

基　　金：农业部国家自然科学基金资助项目

摘　　要：玉米黄化幼苗经4～5℃低温处理36小时后,膜脂组成在自交系间、处理和对照间没有差异;膜脂肪酸不饱和度发生明显变化,抗性强的自交系不饱和指数提高,抗性差的不饱和指数降低,膜结合酶(叶绿体K^+-Mg^(2+)ATPase和线粒体Na^+-K^+ATPase)活性降低,抗性差的自交系膜结合酶活性降低幅度大于抗性强的自交系。After the yellowish seedlings of maize inbreds were treated at 4 C and for 36 hours, the IUFA (Index of Unsaturated Fatty Acids) of cold-resistant inbreds increased where the IUFA of cold-sensitive inbreds decreased. The IUFA of the latter was higher than that of the former no matter whether the temperature was normal or low. Activities of both mitochondria membrane linked K + -Na+ ATPase and of chloroplast membrane linked K+-Mg + + ATPase decreased at low temperature, and the ATPase activity of the cold-sensitive inbreds decreased more severely than that of the cold-resistant inbred.

关 键 词：玉米 抗冷性 膜脂 膜结合酶 

分 类 号：S513.01[农业科学—作物学]