苗期干旱胁迫对不同大豆品种叶片保护酶活性及丙二醛含量的影响  

Effect of Drought Stress at Seedling on Protective Enzyme Activity and MDA Content of Different Soybeans

作　　者：芮海英[1] 王丽娜[1] 金铃[1] 李亮[1] 潘红丽[1] 李建英[1] 李泽宇[1] 谷维[2] 金勋[1] 

机构地区：[1]黑龙江省农业科学院大庆分院,黑龙江大庆163319 [2]黑龙江省农业科学院作物营养研究所,黑龙江哈尔滨150086

出　　处：《大豆科学》2013年第5期647-649,654,共4页Soybean Science

基　　金：国家"十二五"科技支撑计划(2012BAD20B04-2)

摘　　要：为选育优良抗旱的大豆品种以及进一步研究大豆抗旱机制,选用4个大庆地区主栽品种,分别在干旱胁迫条件下测定了叶片超氧化物岐化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性以及丙二醛(MDA)含量,比较了4个品种耐旱性的差异,探讨了其对不同强度干旱胁迫的生理适应性机制。结果表明:在干旱胁迫条件下,4个大豆品种叶片中3种保护性酶活性均呈先增加后降低的趋势,而丙二醛含量则一直增加。干旱胁迫下,品种间各保护酶活性由高到低依次为抗线3号、抗线12、合丰50和抗线9号,而丙二醛含量则相反。说明抗线3号耐旱性较强,而抗线9号耐旱性最差。In order to select soybean varieties with stonger drought resistance, four popular planted soybean cultivars were exposed to drought stress at seedling stage in greenhouse, the activity of superoxidase （ SOD）, peroxidase （ POD）, catalase （CAT） as well as malondialdehyde（MDA） content were determined. Under drought stress, the activity of SOD, POD and CAT showed increase and then decrease trend, while MDA content increased steadily. The activity of three protective enzymes in decending order was Kangxian 3, Kangxian 12, Hefeng 50, and Kangxian 9, while M DA content showed opposite trend. Results showed the drought resistance of Kangxian 3 was the hi^hest, and Kan^xian 9 was the lowest.

关 键 词：干旱胁迫 大豆 生理指标 

分 类 号：S565.1[农业科学—作物学]