NaCl胁迫对碱地风毛菊苗期植株Na^+、K^+含量的影响  

Effects of NaCl stress on contents of Na^+ and K^+ of Saussurea runcinata seedling

作　　者：杨桂英[1] 夏方山[1] 董秋丽[1] 董宽虎[1] 

机构地区：[1]山西农业大学动物科技学院,山西太谷030801

出　　处：《草原与草坪》2011年第2期11-14,共4页Grassland and Turf

基　　金："十一五"国家科技支撑计划课题(2007BAD56B01);农业部公益性行业(农业)科研专项(nyhyzx07-022);山西省科技攻关项目(20080312002-1)资助

摘　　要：通过不同浓度NaCl对碱地风毛菊苗期进行胁迫,测定碱地风毛菊叶片和根系中Na+、K+含量,以探讨NaCl胁迫对碱地风毛菊中Na+、K+分布的影响。结果表明:相同浓度胁迫,碱地风毛菊叶片Na+、K+含量高于根系;随着NaCl浓度的增加,碱地风毛菊根系和叶片的Na+含量显著增加,当NaCl浓度低于300 mmol/L时,碱地风毛菊叶片K+与对照无显著差异;在NaCl胁迫下根系K+含量显著增加,K+/Na+和根系向叶片的离子选择性运输系数(TSK,Na)降低,但TSK,Na<1,表明碱地风毛菊苗期对NaCl有较强的耐性。The contents of Na＋,K＋ in leaf and root of Saussurea runcinata seedling under NaCl stress were measured.The result indicated that the contents of Na＋ and K＋ in leaves were higher than roots under the same concentration and the Na＋ content significantly increased with the increase of NaCl concentration.The K＋ content in leaves did not shown significant difference with control when the concentration of NaCl was less than 300 mmol/L.The content of K＋ in roots significantly increased under NaCl stress,meanwhile,the K＋/Na＋ ratio and TSK,Na declined under NaCl stress,but TSK,Na was less than 1.So,Saussurea runcinata has strong tolerance to NaCl.

关 键 词：盐胁迫 碱地风毛菊 Na+ K+ K+/Na+ TSK Na 

分 类 号：S330.2[农业科学—作物遗传育种]