水分胁迫下小麦幼苗的抗氧化机制分析  

Antioxidant Mechanism of Wheat Seedlings under Water Stress

作　　者：崔香环[1] 李欢庆[2] 郝福顺[1] 

机构地区：[1]河南大学农业生物技术研究所生命科学学院,河南开封475001 [2]河南工业大学生物工程学院,河南郑州450052

出　　处：《河南农业科学》2007年第4期25-28,共4页Journal of Henan Agricultural Sciences

基　　金：国家自然科学基金资助项目(30670183)

摘　　要：分析了水分胁迫对小麦幼苗叶片中活性氧(ROS)水平和抗氧化酶活性的影响,结果发现,水分胁迫能够显著提高超氧阴离子(O2-.)和丙二醛(MDA)的含量及超氧化物歧化酶(SOD)和抗坏血酸过氧化物酶(APX)的活性,而过氧化氢(H2O2)的含量及过氧化氢酶(CAT)和谷胱甘肽还原酶(GR)的活性变化不明显。这些结果表明,SOD和APX在小麦应答水分胁迫的反应中可能起重要作用。Effects of water stress on the level of reactive oxygen species（ROS）and activities of antioxidant enzymes in the leaves of wheat （Triticum durum Desf. ） seedlings were investigated. Water stress resulted in significant increase in the contents of O2^-, MDA and the activities of superoxide dismutase and ascorbate peroxidase in wheat leaves. However, the activities of glutathione reductase,catalase and the content of H2O2 were not changed obviously under water stress. These results suggested that superoxide dismutase and ascorbate peroxidase may play important roles in the responses of wheat to water stress.

关 键 词：小麦 水分胁迫 活性氧 抗氧化酶 

分 类 号：S512.1[农业科学—作物学]