硅对盐胁迫下金丝小枣3种抗氧化酶的影响  

Effects of Silicon on Antioxidant Enzyme System of Zizyphus jujuba cv.Jinsi-xiaozao Under Salt Stress

作　　者：刘永霞[1] 胡东峰[1] 徐锡增[1] 

机构地区：[1]南京林业大学森林资源与环境学院,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2007年第2期19-22,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家自然科学基金资助项目(30471368)

摘　　要：以1年生金丝小枣嫁接苗为试材,研究硅对盆栽苗在盐胁迫下谷胱甘肽过氧化物酶(GSH-Px)、超氧化物歧化酶(SOD)和过氧化物酶(POD)活性的影响。结果表明:在盐浓度(NaCl质量分数)小于0.4%时,SOD和GSH-Px的活性随着土壤含盐量的增加而增加,POD活性在NaCl质量分数为0.25%的盐胁迫下升高,在NaCl质量分数为0.4%的盐胁迫时下降;盐胁迫下加硅可以显著提高金丝小枣SOD、POD和GSH-Px的活性且差异显著。笔者认为盐胁迫下给土壤施硅可以缓解盐分对金丝小枣的毒害作用。Effects of silicon on changes of glutathione peroxidase （GSH-Px） and superoxide dismatase （SOD） and peroxidase （POD） activity of Zizyphus jujuba cv. Jinsi-xiaozao of one-year-grafted seedings under salt stress were studied. The experimental results showed that superoxide dismatase （SOD）and GSH-Px activity increased with increased of salinity under salinity conditions, POD activity increased under 0.25% NaCl and decreased under 0. 4% NaCl. When silicon was added to soil salt, SOD,POD and GSH-Px activity increased significantly. It was implied that the damage by salt stress on Z. jujuba cv. Jinsi-xiaozao could be alleviated by silicon.

关 键 词：硅 盐胁迫 金丝小枣 超氧化物歧化酶 过氧化物酶 谷胱甘肽过氧化物酶 

分 类 号：S718[农业科学—林学]