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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

DOI: 10.3321/j.issn:1000-7091.1999.04.008, PP. 39-44

Keywords: 盐分胁迫,6-苄基腺嘌呤,SNa+、K+,抗盐性

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Abstract:

以小麦为材料,研究盐分胁迫条件下6-苄基腺嘌呤对小麦(TriticumaestivumL)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。

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