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.
出处
《作物杂志》
CAS
CSCD
北大核心
2010年第1期49-52,共4页
Crops
基金
山东省自然基金项目ZR2009DQ014
关键词
玉米
苗期
盐胁迫
脯氨酸
Maize
Seedling Stage
Salt stress
Proline
