IAA和SA对盐胁迫下萝卜幼苗生理特性的影响  

Effect of IAA and SA on Physiological Characteristics of Radish Seedlings Under Salt Stress

作　　者：张会灵 吴正景[1] 郭大龙[1] 何舒乐 李琼[1] 张菊平[1] 

机构地区：[1]河南科技大学林学院,河南洛阳471023

出　　处：《北方园艺》2017年第8期32-34,共3页Northern Horticulture

基　　金：国家自然科学基金资助项目(31401437);河南科技大学博士科研启动基金资助项目(4026-13480045);河南科技大学创新团队资助项目(2015TTD03)

摘　　要：以萝卜为试材,研究了不同浓度的吲哚乙酸(IAA)和水杨酸(SA)(0、0.3、0.6、0.9、1.2、1.5mmol·L^(-1))对NaCl胁迫下萝卜幼苗生理特性的影响。结果表明:NaCl胁迫下萝卜幼苗的各项生理指标都发生了显著变化。经适宜浓度的吲哚乙酸和水杨酸处理后,萝卜幼苗的还原糖含量、脯氨酸含量、丙二醛含量和相对电导率显著降低,叶绿素含量显著升高,对盐害有一定的缓解作用。但是浓度过高,又会形成新的胁迫伤害。其中,IAA的最佳浓度为0.9mmol·L^(-1),SA的最佳浓度为0.6mmol·L^(-1)。In the experiment,the effects of different concentrations（0,0.3,0.6,0.9,1.2,1.5 mmol·L^（-1））of indole-3-acetic acid and salicylic acid on the physiological characteristics of radish seedlings under NaCl stress were studied.The results showed that there were significant changes in the physiological indexes of radish seedlings under NaCl stress.When the seedlings were treated with the proper concentrations of indole-3-acetic acid and salicylic acid,the reducing sugar content,proline content,MDA content and relative conductivity significantly decreased,while the chlorophyll content increased significantly,which had a certain role in mitigation to salt damage.However,if the concentration was too high,there was a new stress injury.According the results,the optimal concentration of indole-3-acetic acid was 0.9mmol·L^（-1）,and the best concentration of salicylic acid was0.6mmol·L^（-1）.

关 键 词：吲哚乙酸(IAA) 水杨酸(SA) 萝卜幼苗 生理特性 

分 类 号：S631.104.3[农业科学—蔬菜学]