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

• 作 者: 张士功 高吉寅 宋景芝
• 机 构: 中国农业科学院山区研究室!北京100081,中国农业科学院品种资源研究所抗逆研究室!北京100081,中国农业科学院品种资源研究所抗逆研究室!北京100081
• 出 处: 华北农学报
• 发表日期: 1999年04期
• 关键词: 小麦幼苗 Na Cl 苄基腺嘌呤 盐分胁迫 Triticum 幼苗叶 抗盐品种 抗盐性 盐处理

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。

Using wheat as material, the effects of 6benzyladenine on the absorption and distribution of Na +, K + and Cl- of seedlings of wheat (Triticum aestivum L-) under salt stress were studied. The results showed that 6benzyladenine could limit the uptake of Na + in seedlings to a certain extent, and retard the amount and speed of Na + transport to the aboveground parts; increase the K + content in the body and transport efficiency upwards and decrease the Na +, K + Selectivity (SNa +, K +), while 6benzyladenine can also promote the root of Cl-uptake of seedlings and Cl- effectively limited to the root, block Cl- upward transport, the relative reduction of the above ground Cl- content. All of these changes are conducive to improving salt tolerance and adaptability to salt stress in wheat seedlings.