干旱条件下不同温型小麦叶片衰老与活性氧代谢特性的研究  

Leaf senescence and active oxygen metabolism of different-type wheats under drought

作　　者：冯佰利[1] 高小丽[1] 王长发[1] 张嵩午[1] 李生秀[1] 

机构地区：[1]西北农林科技大学,杨陵712100

出　　处：《中国生态农业学报》2005年第4期74-76,共3页Chinese Journal of Eco-Agriculture

基　　金：国家自然科学基金重大项目(30230230);国家自然科学基金项目(39870477)资助

摘　　要：试验研究干旱条件下不同温型小麦叶片衰老和活性氧代谢特性结果表明,与暖型小麦相比,冷型小麦叶片叶绿素和可溶性蛋白质含量下降缓慢,丙二醛含量低,累积速度慢,而保护性酶超氧化物歧化酶、过氧化氢酶和过氧化物酶活性降幅小,且籽粒灌浆中后期各酶活性均较高。小麦叶片衰老和活性氧代谢特性与其温度型归属关系密切,可借助冠层温度进行抗旱材料生理代谢性状的判别。The leaf senescence and active oxygen metabolism of different-type wheats under drought were studied. The resuits indicate that leaf senescence is associated with the decreases of SOD,POD and CAT activities. A marked increase of MDA content and a product of lipid peroxidation are observed during leaf senescence. Cold type wheat has a canopy temperature continuously lower than that of control, especially during the milk-filling period. Many of its characters, such as chlorophyll content, soluble protein content and active oxygen （SOD, CAT, POD）are more superior than those of warm type wheat. Active oxygen metabolism may be responsible for the relationship between canopy temperature and grain yield.

关 键 词：冷型小麦 干旱 叶片衰老 活性氧代谢特性 冠层温度 代谢特性 干旱条件 活性氧 超氧化物歧化酶 可溶性蛋白质含量 

分 类 号：S512.101[农业科学—作物学] TS245.4[轻工技术与工程—制糖工程]