摘要
在NaCl胁迫下,钙明显减少大麦和小麦幼苗对Na^+ 的吸收及其向地上部的运输,增加K^+、Ca^2+的吸收和向地上部的运输,降低叶片电解质渗漏率,增加干物质积累。钙明显提高盐胁迫下幼根钿胞质膜和液泡膜微囊H^+ -ATP 酶活性及根系呼吸强度,与钙调节大麦和小麦对离子的吸收、分配的结果一致。因此认为根系质膜和液泡膜H^+ -ATP酶活性增加是调节离子吸收、分配的主要原因之一。
Calcium decreased N^+ absorption and transportation to the shoots,increased K^+ and Ca^(2+) ab- sorption and transportation,decreased the leakage of electrolyties,and increased the accumulation of dry matter in barley and wheat seedlings under NaCl stress. Calcium ion promoted the H^+-AT- Pase activities in plasma membrane and tonoplast vesicles isolated from the young rootS of the two plants, and increased respiration of the roots. This is in consistent with the results that calcium regulates ion absorption and distribution via its enhancement of H^+-ATPase activities in plasma membrane and tonoplast.
基金
国家自然科学基金
关键词
大麦
小麦
盐
钙
离子
吸收
Barley
Wheat
Salt stress
Calcium
Ion absorption and distribution
H^+ATPase
