水杨酸预处理对青稞幼苗盐胁迫的缓解效应  

The Mitigative Effects of Salicylic Acid Pretreatment on Hulless Barley Seedlings Under Salt Stress

作　　者：黄晓西[1] 刘昭弟[1] 王怀林[1] 王娟[1] 段辉国[1,2] 

机构地区：[1]内江师范学院生命科学学院,四川内江641112 [2]特色农业资源研究与利用四川省高等学校重点实验室,四川内江641112

出　　处：《贵州农业科学》2012年第10期47-49,共3页Guizhou Agricultural Sciences

基　　金：四川省教育厅重点研究项目"水杨酸(SA)对盐胁迫植物生理生化特性影响研究"(09ZA054);内江师范学院生态学重点建设学科项目[内师科字(2007)24];内江师范学院大学生科研项目"水杨酸对盐胁迫下青稞抗渗透胁迫物质的影响"(11NSD-171)

摘　　要：为了解水杨酸在青稞幼苗抗盐胁迫中的作用,以青稞幼苗为试材,用水培法研究了1mmol/L水杨酸(SA)预处理对200mmol/L NaCl胁迫下青稞幼苗叶片相对含水量(RWC)、相对电导率和丙二醛(MDA)、蛋白质、可溶性糖、脯氨酸含量的影响。结果表明:经1mmol/L SA预处理的青稞幼苗RWC下降较慢,相对电导率、MDA含量显著低于对照组且上升较慢,可溶性糖、蛋白质、脯氨酸含量则显著高于对照组。结论:水杨酸能在一定程度上增强青稞幼苗抗盐胁迫的能力,缓解盐胁迫对其造成的伤害。In order to understand the salicylic acid role in hulless barley seedlings with salt stress,the effects of 1 mmol/L（SA） pretreatment on relative water content（RWC）,relative electrical conductivity and contents of malondialehyde（MDA）,soluble protein,soluble sugar,proline in hulless barley seedlings under 200 mmol/L NaCl stress were investigated.The results showed that RWC decreased more slowly,while the relative electrical conductivity and MDA content were obviously lower and rose more slowly,contents of soluble sugar,protein and proline were significantly higher in hulless barley seedlings by 1mmol/L SA pretreated than CK under same concentration NaC1 stress.The results suggested that salicylic acid could enhance the ability of salt resistance,alleviate damages in hulless barley seedlings by salt stress.

关 键 词：水杨酸 青稞幼苗 盐胁迫 

分 类 号：S512.3[农业科学—作物学]