外源钙对盐胁迫下芸薹属植物幼苗的生理效应  

Physiological effects of exogenous calcium on Brassica seedlings under the salt stress

作　　者：曾长立[1] 董元火[1] 

机构地区：[1]江汉大学生命科学学院,湖北武汉430056

出　　处：《中国油料作物学报》2008年第4期433-437,442,共6页Chinese Journal of Oil Crop Sciences

基　　金：江汉大学博士科研启动基金(编号为:2006-21)

摘　　要：研究了外源钙对盐胁迫下"禹氏三角关系"中3个芸薹属多倍体物种(Brassica carinata、B.juncea和B.napus)和3个祖先二倍体物种(B.nigra、B.oleracea和B.rapa)幼苗中叶绿素含量、MDA、SOD、POD和CAT活性的影响。结果表明,盐胁迫7d后,加入外源钙,与对照相比,可显著提高叶绿素含量,降低MDA含量,提高SOD、POD及CAT的活性,表明外源钙可明显降低芸薹属植物的盐胁迫效应。此外,在盐胁迫下,使用外源钙后产生的各生理效应差异主要受物种本身的影响,然后是钙处理,而物种-钙处理间的交互作用则很小。通过各物种间生理指标的比较分析后发现,多倍体复合种的耐盐性比其祖先二倍体亲本强,但在对钙的敏感程度及作用效果上,则是后者强于前者。The effect of calcium on the content of chlorophyll and the activity of MDA, SOD, POD and CA- Tunder salt stress in three amphidiploid species ：Brassica carinata,B, juncea and B. napus, and their ancestor parents,B, nigra,B, oleracea and B. rapa in ＂The triangle of U＂ were studied. The results demonstrated that the treatment of calcium could markedly improve the content of chlorophyll, decrease the content of MDA, and increase the activity of SOD, POD and CAT, comparing to the control, after 7 days under salt stress. Therefore, the results indicated that exogenous calcium could reduce the salt injury effect of Brassica plants. Furthermore, the difference among these physiological effects resulted from exogenous calcium was mainly influenced by the species, and then calcium treatment; and the influence from the interaction of species and calcium treatment was very small. The comparative analysis among these physiological indices of each species showed that the salt endurance of the amphidiploids in ＂The triangle of U＂ were better than their ancestor parental diploids. However, the latter was better than the former in the degree of sensitivity and functional effect.

关 键 词：芸薹属植物 盐胁迫 钙 生理效应 

分 类 号：S565.401[农业科学—作物学]