盐胁迫下不同玉米品种在苗期叶片和根中Na^+、K^+、Ca^(2+)及脯氨酸含量变化的研究  

Changes of Na^+,K^+,Ca^(2+) and Praline Contents in Leaf and Root of Different Maize Hybrids under Salt Stress at Seedling Stage

作　　者：韩金龙[1] 徐立华[1] 徐相波[1] 王同燕[1] 周柱华[1] 邢燕菊[1] 丁一[1] 

机构地区：[1]山东省农业科学院原子能农业应用研究所,山东济南250100

出　　处：《作物杂志》2010年第1期49-52,共4页Crops

基　　金：山东省自然基金项目ZR2009DQ014

摘　　要：选用自有耐盐专用品种山大耐盐1号和国审普通玉米品种浚单20在0～300mmol/L不同浓度NaCl溶液的胁迫下萌发生长,测定玉米苗期叶片和根中Na+、K+、Ca2+及脯氨酸含量。结果表明,随着NaCl溶液浓度的不断提高,玉米叶片和根中Na+含量逐渐升高,K+和Ca2+含量逐渐降低,根中各测定离子含量高于叶片中各离子含量。同时脯氨酸含量逐渐升高,而且存在一个极限值,超过这个极限值脯氨酸含量出现下降,但仍然维持较高水平。两个玉米品种间在以上测定项目中表现出的差异非常明显,可以作为耐盐品种选育的借鉴和品种耐盐性强弱的评价。The contents of Na＋,K＋,Ca2＋,and praline in the leaf and root of maize hybrids （Shandanaiyan 1 with salt tolerance and Jundan 20） under NaCl stress （from 0 to 300 mmol/L） were investigated in this study.The results showed that the content of Na＋ in leaf and root raised obviously while the contents of K＋ and Ca2＋ reduced,with increasing NaCl concentrations.It was also found that the contents of these cations in root was higher than that in leaf.Furthermore,the content of proline raised first and then decreased to a high level.The difference of the contents of cations and proline between two cultivars was significant,which could be used as reference for breeding of salt tolerant cultivars.

关 键 词：玉米 苗期 盐胁迫 脯氨酸 

分 类 号：S513[农业科学—作物学]