外源ABA对NaCl胁迫下紫花苜蓿矿质元素和脯氨酸含量的影响  

Effects of ABA on the content of mineral element and proline of two alfalfa varieties under NaCl stress condition

作　　者：杨跃霞[1] 刘大林[1] 韩建国[2] 赵国琦[1] 韩娟[1] 王小山[1] 

机构地区：[1]扬州大学动物科学与技术学院,江苏扬州225009 [2]中国农业大学草地研究所,北京100094

出　　处：《草业科学》2010年第5期57-61,共5页Pratacultural Science

基　　金：2007年公益性行业(农业)科研专项资助项目(ny-hyzx07-022)

摘　　要：研究不同浓度ABA处理对150 mmol/L NaCl胁迫下(水培条件)的2个不同品种紫花苜蓿Medicagosativa(维多利亚、中苜一号)矿质元素和脯氨酸含量的影响。结果表明:NaCl胁迫显著降低紫花苜蓿植物组织根、茎、叶的干质量。盐胁迫下各组织中积累大量脯氨酸,分布情况为叶>茎>根,外源ABA能显著提高各组织中脯氨酸的含量。且维多利亚紫花苜蓿脯氨酸含量明显高于中苜一号。与NaCl胁迫相比,添加ABA,2个不同品种紫花苜蓿Na+和Mg2+含量均降低,而K+和Ca2+含量增高,且添加浓度为10μmol/LABA时效果最好。In the hydroponics conditions,we studied the mineral elements and proline contents of two alfalfa varieties under different exogenous abscisic acid（ABA） concentrations and 150 mmol/LNaCl.The results showed that the dry matters weight of different plant organs decreased significantly in NaCl tolerance.However,proline content accumulated seriously,which appeared differently in organs： leaf 〉shoot〉root.Moreover,accumulations of proline were more significant under the treatment of NaCl＋ ABA.And the contents of Victoria were higher than Zhongmu No.1.Compared with the NaCl treatment,the added ABA significantly decreased Na contents and Mg contents,but notably increased K contents and Mg contents.But when the concentration of abscisic acid was 10 μmol/L,the effect was more better.

关 键 词：氯化钠 紫花苜蓿 脱落酸 脯氨酸 

分 类 号：S541.9[农业科学—作物学]