硅对盐胁迫下金丝小枣叶片不同多胺形态和含量的影响  

Effects of Silicon on Polyamine Types and Forms in Leaf of Zizyphus jujube cv. Jinsi-xiaozao Under Salt Stress

作　　者：刘永霞[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4期27-32,共6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：对盐胁迫及盐胁迫下施硅肥的金丝小枣叶片中游离态(f)、高氯酸可溶性共价结合态(PSCC)和高氯酸不溶性共价结合态(PISCC)3种不同形态多胺(PAs)的含量变化进行了分析。结果表明:在盐分浓度c≤4.0g/kg范围内,金丝小枣叶片f-Put含量及f-PAs总量均显著下降,(Spd+Spm)/Put的比值均显著上升;金丝小枣叶中PSCC-Put和总PSCC-PAs含量随着盐浓度的增加显著增加;PISCC-Put含量随着盐浓度的增加而显著增加,PISCC-Spd和PISCC-Spm含量则随着盐浓度的增加而减少。在同一土壤盐分水平下,硅处理可以显著增加盐胁迫下金丝小枣叶中多胺(f-Spm+f-Spd)/f-Put比值及f-Put、f-Spd、PSCC-Put、PSCC-Spd和总PSCC-PAs的含量;施硅可以增加盐胁迫下金丝小枣叶中PISCC-Spd和PISCC-Spm的含量,抑制盐胁迫下PISCC-Put水平的升高,表明外源硅可以调节盐胁迫下金丝小枣体内不同种类和形态的多胺含量,从而缓解盐对金丝小枣的毒害作用。The change of three polyamine＇s content was researched under salt stress and silicon fertilizer added after salt stress. Three different forms of polyamine individually are free form, perchloric acid soluble covalently conjugated form （PSCC） and perchloric acid insoluble covalently conjugated form（PISCC）. The result of this research was as follows： the f- Put and the total content of Polyamine under salt stress descends remarkably and the ratio between （Spd＋Spm） and the total put ascends notably; PSCC- Put and the total content of PAs ascended notably with increasing salinity under salinity conditions with the increase of salt＇s strength and the same as f- Put; PISCC - Put ascends with the increase of salt＇s strength and the content of PISCC- Spd and PISCC - Spm ascends with the increase of salt＇ s strength. At the same level of salt＇s strength, the ratio of （f-Spm＋f-Spd） and f-Put increases remarkably with silicon fertilizer and the same as f- Put, f -Spd, PSCC- Put, PSCC- Spd and the total content of PSCC-PAs; with silicon fertilizer, the content of PIS- CC-Spd and PSICC-Spm under salt stress increase; in addition, the level of PISCC -Put is inhibited. It indicated that Si regulated the content of different polyamine types and forms in Zizyphusjujube cv. Jinsi-xiaozao leaves. Therefore, it alleviated the toxic effects from salt ions.

关 键 词：硅 金丝小枣 盐胁迫 多胺 

分 类 号：S718.43[农业科学—林学]