高温和CO_2浓度倍增对华北落叶松幼苗抗氧化酶及脂质过氧化的影响  

Effects of high temperature and doubled CO_2 on antioxidant enzymes and lipid peroxidation in Larix principis-rupprechtii Mayr seedlings

作　　者：梁建萍[1] 刘咏梅[1] 牛远[1] 谢敬斯[1] 

机构地区：[1]山西农业大学林学院,太谷030801

出　　处：《中国生态农业学报》2007年第3期100-103,共4页Chinese Journal of Eco-Agriculture

基　　金：山西省自然科学基金项目(2006011082)资助

摘　　要：在35℃高温和CO2浓度700μmol/mol的人工模拟复合处理下,研究了华北落叶松幼苗抗氧化酶活性及膜脂过氧化的变化。结果表明,高温胁迫下华北落叶松幼苗超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性呈下降趋势,而在CO2倍增和其与温度复合胁迫下上述酶活性增强;丙二醛(MDA)含量在高温胁迫下提高,在CO2倍增及与温度复合胁迫下降低。表明CO2倍增可以通过提高体内抗氧化酶活性,有效地提高华北落叶松幼苗对高温胁迫的防御能力。Under simulated environment of 35℃ and 700μmol/mol CO2, the activities of antioxidant enzymes and changes of lipid peroxidation in Larix principis-rupprechtii Mayr seedlings were investigated. The results show that activities of superoxide dismatase （SOD）, peroxidase （POD） and catelase （CAT） are decreased under the stress of high temperature, while increased under doubled CO2 and the complex stress of high temperature and doubled CO2. The content of malondialdehyde （MDA） raises under high temperature, but reduces under doubled CO2, as well as the complex stress. The resuits indicate that doubled CO2 could effectively elevate the defensive capacity of Larix principis-rupprechtii Mayr seedlings against the stress of high temperature by improving antioxidant enzyme activity.

关 键 词：华北落叶松 高温 CO2倍增 抗氧化酶 膜脂过氧化 

分 类 号：S565.4[农业科学—作物学]