NaCl胁迫对苜蓿幼苗生长及不同器官中盐离子分布的影响

草业学报 ›› 2011, Vol. 20 ›› Issue (2): 134-139.

NaCl胁迫对苜蓿幼苗生长及不同器官中盐离子分布的影响

景艳霞,袁庆华^*

中国农业科学院北京畜牧兽医研究所,北京 100094

收稿日期:2010-03-18 出版日期:2011-02-25 发布日期:2011-04-20
通讯作者: E-mail:yuanqinghua@hotmail.com
作者简介:景艳霞(1984-),女,内蒙古察右中旗人,在读硕士。E-mail:jingyanxia1020@163.com
基金资助:
科技支撑项目(2011BAD17B01)和行业科技项目(nyhyzx07-022)资助。

Effects of salt stress on seedling growth of alfalfa (Medicago sativa) and ion distribution in different alfalfa organs

JING Yan-xia, YUAN Qing-hua

Institute of Animal Sciences, CAAS, Beijing 100094, China

Received:2010-03-18 Online:2011-02-25 Published:2011-04-20

摘要/Abstract

摘要： 研究了不同浓度NaCl胁迫下(盐浓度处理为0,0.1%,0.3%,0.5%,0.7%,0.9%)苜蓿不同器官的生长情况(存活率、根长、茎长、叶片数),以及不同器官中Na⁺、K⁺、Ca²⁺、Mg²⁺的含量,并分析了K/Na、Ca/Na、Mg/Na值的变化。结果表明,存活率、根长、茎长与盐浓度呈负相关,且当NaCl≤0.1%时,有利于苜蓿的生长。除根茎叶中Na⁺含量、根中Ca²⁺与盐浓度呈正相关,茎叶中的Ca²⁺与盐浓度相关性不明显外,根茎叶中K⁺、Mg²⁺、K/Na、Ca/Na、Mg/Na均随盐浓度增加而显著下降,且盐处理与对照差异显著(P＜0.05)。另外从离子角度讨论了盐对苜蓿的毒害以及耐盐的原因。

Abstract: The effects of different concentrations of NaCl (0, 0.1%, 0.3%, 0.5%, 0.7%, 0.9%) on growth of alfalfa (Medicago sativa) (survival rate, root length, stem length, leaf number) and the contents of Na⁺, K⁺, Ca²⁺, Mg²⁺ in the different organs were assessed and the ratio of K/Na, Ca/Na, and Mg/Na were analysed. The survival rate, root length, and stem length were all negatively correlated with salt concentration, except when the NaCl concentration was ≤0.1%. The content of Na⁺ in root, stem and leaves and the content of Ca²⁺ in roots were all positively correlated with salt concentration. However, the contents of K⁺ and Mg²⁺, and the ratios of K/Na, Ca/Na, Mg/Na in roots, stems and leaves significantly decreased with an increase of salt concentration. Salt stress on alfalfa caused significant differences in the comparisons. The reason for salt injury and salt-tolerance in alfalfa are discussed in relation to ion toxicities.

中图分类号:

景艳霞,袁庆华. NaCl胁迫对苜蓿幼苗生长及不同器官中盐离子分布的影响[J]. 草业学报, 2011, 20(2): 134-139.

JING Yan-xia, YUAN Qing-hua. Effects of salt stress on seedling growth of alfalfa (Medicago sativa) and ion distribution in different alfalfa organs[J]. Acta Prataculturae Sinica, 2011, 20(2): 134-139.

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