盐胁迫下外源硅调节金丝小枣根和叶片膜脂肪酸的研究(英文)  

Exogenous Silicon Regulates Membrane Fatty Acid in Root and Leaf of Ziziphus jujuba cv.Jinsixiaozao under Salt Stress

作　　者：徐呈祥[1] 马艳萍[2] 徐锡增[1] 胡恒康[2] 

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 [2]金陵科技学院园艺系,江苏南京210038

出　　处：《南京林业大学学报（自然科学版）》2006年第2期89-93,共5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2年生金丝小枣为试材,研究了NaCl胁迫下施硅(Si)与金丝小枣的根和叶片膜脂肪酸含量、组成及流动性的关系。结果表明:NaCl胁迫165 d,加硅与不加硅相比,金丝小枣根的饱和脂肪酸含量降低,不饱和脂肪酸含量升高,脂肪酸不饱和指数增大,膜流动性增强,碳链长度保持稳定;而在叶中则呈相反趋势。说明外源硅可调节盐(NaCl)胁迫下金丝小枣细胞膜脂肪酸含量、组成及流动性,该效应与金丝小枣器官的生理功能和生长特性有关。Effects root and leaf of were studied. T of silicon （Si） on membrane fatty two-year old seedlings of Ziziphus acid content, composition and fluidity in jujuba ev. J insixiaozao he results showed that the addition of Si had different effects under salt stress on these parameters decre fatty in root and leaf of the plant ased with added Si compared under NaCl stress： in root, the saturate fatty acid content with that of no Si a acid content and the index of unsaturate fatty dd ac tl d NaCl stress with Si addition, but the effects of exogenous on. Both the membrane unsaturate of the root were promoted under Si on membrane fatty acid （MFA） content and composition of the leaf were contrary to those of in root . The results from this study suggestes that Si regulates the content, composition and fluidity of Ziziphus jujuba cv. Jinsixiaozao under NaCl stress, which is closely related to the physiological functions and growth characteristics of the plant organs.

关 键 词：硅 NACL胁迫 金丝小枣 膜脂肪酸 膜流动性 

分 类 号：S718.43[农业科学—林学]