首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Growth and abscisic acid responses of Medicago sativa to water stress at different growth stages
Authors:Yue LI  Liqiang WAN  Yufei WANG  Xianglin LI
Institution:Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
Abstract:A pot experiment was conducted in a greenhouse with three alfalfa (Medicago sativa) cultivars, Aohan, Zhongmu No.1 and Sanditi, to examine the morphological and physiological responses of alfalfa to water stress. The response of alfalfa to water stress at different growth stages was generally similar, but varied among cultivars. At the branching, flowering and podding stages, the shoot biomasses of Aohan and Zhongmu No.1 were greatly affected by, and responded quickly to, water stress. The shoot biomass of Sanditi was not affected by mild water stress, but had a slight response to moderate and severe water stress. The root/shoot ratios in Aohan and Zhongmu No.1 were more sensitive to water stress than in Sanditi, with the root/shoot ratio in Aohan increasing most significantly. At flowering, the root/shoot ratio was the highest and the effect of water stress the greatest. The abscisic acid (ABA) concentration in the roots of Aohan and Zhongmu No.1 increased under water stress, while in Sanditi there was only a slight or delayed response of ABA concentration.
Keywords:abscisic acid  alfalfa  drought response  growth stage  water deficit  
点击此处可从《》浏览原始摘要信息
点击此处可从《》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号