旱盐互作对盐地碱蓬生长及其渗透调节物质的影响  

Interactive effect of sodium chloride and drought on growth and osmotica of Suaeda salsa

作　　者：黄玮[1] 李志刚[1] 乔海龙[1] 李存桢[1] 刘小京[1] 

机构地区：[1]中国科学院遗传与发育生物学研究所农业资源研究中心

出　　处：《中国生态农业学报》2008年第1期173-178,共6页Chinese Journal of Eco-Agriculture

基　　金：国家高技术研究(863)发展计划项目(2006AA100206);河北省“十一五”攻关课题(06220111D-1)资助

摘　　要：采用盆栽土培的方法,研究了不同干旱条件下盐胁迫对盐地碱蓬生长及其渗透调节物质的影响。结果表明:适量NaCl可提高干旱条件下盐地碱蓬的生物量和植株含水量,缓解其干旱胁迫。盐分改变了干旱条件下盐地碱蓬的渗透调节物质,随着盐浓度的增加,叶片中Na+、Cl-的积累增加,而叶片中的K+积累减少;干旱条件下,叶片Na+、Cl-以及K+的积累增加,增强了盐地碱蓬在干旱条件下的渗透调节能力。叶片中脯氨酸的积累随着土壤含盐量和土壤干旱程度的增加而增加。A pot culture experiment was designed to study the interactive effect of sodium chloride and water stress on the growth and osmotica of Suaeda salsa. Results show that moderate sodium chloride promotes plant growth and increases water content of Suaeda salsa under drought condition,and alleviates drought stress of Suaeda salsa. Accumulation of Na^＋ and Cl^- in leaves increases with increasing soil salinity,while K^＋ content decreases. Na^＋ ,Cl^- and K^＋ contents in leaves further increase under drought stress,improving osmotic adjustment ability of plants in saline soils. Proline accumulation in leaves increases with increased salt and water stresses.

关 键 词：盐地碱蓬 盐生植物 干旱胁迫 盐胁迫 生长 渗透调节物质 

分 类 号：S155.2[农业科学—土壤学]