草业学报2011，Vol.20Issue(2)：134-139,6.
NaCl胁迫对苜蓿幼苗生长及不同器官中盐离子分布的影响
Effects of salt stress on seedling growth of alfalfa (Medicago sativa)and ion distribution in different alfalfa organs
摘要
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 ana lysed. 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.关键词
盐胁迫/苜蓿/幼苗生长/离子分布Key words
salt stress/ alfalfa/ seeding growth/ ion distribution分类
农业科技引用本文复制引用
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):134-139,6.基金项目
科技支撑项目(2011BADl7B01)和行业科技项目(nyhyzx07-022)资助. （2011BADl7B01）
