低氧胁迫对不同耐性黄瓜品种根系抗氧化系统的影响  

Influence of Hypoxia Stress on Antioxidative System of Roots in Two Different Resistant Cucumber (Cucumis sativus L.) Cultivars

作　　者：康云艳[1] 郭世荣[1] 段九菊[1] 

机构地区：[1]南京农业大学园艺学院,南京210095

出　　处：《植物生理学通讯》2007年第4期630-634,共5页Plant Physiology Communications

基　　金：国家自然科学基金(30571263)

摘　　要：低氧胁迫下,两品种黄瓜幼苗根中活性氧、丙二醛(MDA)和抗氧化剂含量以及超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)和脱氢抗坏血酸还原酶(DHAR)活性均显著提高,耐低氧性较强的‘绿霸春4号’根中活性氧和丙二醛含量上升幅度小于耐低氧性较弱的‘中农8号’,而保护酶活性和还原型抗氧化剂含量提高幅度大于‘中农8号’。Seedlings of a hypoxia-resistant cultivar, ‘Lübachun No.4＇, and a hypoxia-sensitive cultivar, ‘Zhongnong No.8＇, were subjected to hypoxia stress treatments. Under hypoxia stress, the contents of ROS, MDA and antioxidants, and the activities of SOD, CAT, APX, and DHAR were enhanced in cucumber seedlings roots of both two varieties. The extent of increase in ROS and MDA contents in ‘Lübachun No.4＇ roots was less than those in ‘Zhongnong No.8＇ roots, however, the extent of increase in activities of SOD, CAT, APX, DHAR and AsA and GSH contents in ‘Lübachun No.4＇ roots was greater than those in ＇Zhongnong No.8＇ roots.

关 键 词：低氧胁迫 黄瓜幼苗 抗氧化系统 

分 类 号：S642.2[农业科学—蔬菜学]