6-苄基腺嘌呤对盐分胁迫条件下小麦幼苗体内Na^+、K^+和Cl^-的含量及其分布的影响

Effects of 6-Benzyladenine on Content and Distribution of Na^+,K^+ and Cl^- in Wheat (Triticum aestivum L.) Seedling Under Salt Stress

以小麦为材料,研究盐分胁迫条件下6苄基腺嘌呤对小麦( Triticum aestivum L-) 幼苗Na+ 、K+ 、Cl- 吸收、分配的影响。结果表明,6苄基腺嘌呤能够在一定程度上限制幼苗对Na+ 的吸收,阻滞其向地上部分运输的数量和速度;提高体内K+ 含量、向上运输效率,降低地上部分对Na+ 、K+ 的选择性(SNa+ 、K+) ,同时6苄基腺嘌呤还能够促进幼苗根系对Cl- 的吸收,并有效地将Cl- 限制在根部,阻滞Cl- 向上运输,相对降低地上部分的Cl- 含量。所有这些变化都有利于提高小麦幼苗抗盐性和对盐分胁迫的适应性。

Effects of 6 benzyladenine on content and distribution of Na +,K +and Cl -in wheat (Triticum aestivum L.)seedling under salt stress were studied.The results showed that 6 benzyladenine could relatively inhibit the absorption of Na + and Cl -,cut down the quantity and rate of its transportation to shoot,and increase the K + content in wheat seedling,decrease Na +,K + selectivity ratio(S Na +、K + )of transportation to shoot.Therefore the salt resistance and the adaptability of wheat seedling to salt stress were raised.