...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Expansin-regulated cell elongation is involved in the drought tolerance in wheat
【24h】

Expansin-regulated cell elongation is involved in the drought tolerance in wheat

机译：扩展蛋白调节的细胞伸长与小麦的耐旱性有关

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Water stress restrains plant growth. Expansin is a cell wall protein that is generally accepted to be the key regulator of cell wall extension during plant growth. In this study, we used two different wheat cultivars to study the involvement of expansin in drought tolerance. Wheat coleoptile was used as the material in experiment. Our results indicated that water stress induced an increase in acidic pH-dependant cell wall extension, which is related to expansin activity; however, water stress inhibited coleoptile elongation growth. The increased expansin activity was mainly due to increased expression of expansin protein that was upregulated by water stress, but water stress also resulted in a decrease in cell wall acidity, a negative factor for cell wall extension. Decreased plasma membrane H~+-ATPase activity was involved in the alkalinization of the cell wall under water stress. The activity of expansin in HF9703 (a drought-tolerant wheat cultivar) was always higher than that in 921842 (a drought-sensitive wheat cultivar) under both normal and water stress conditions, which may be correlated with the higher expansin protein expression and plasma membrane H~+-ATPase activity observed in HF9703 versus 921842. However, water stress did not change the susceptibility of the wheat cell wall to expansin, and no difference in this susceptibility was observed between the drought-tolerant and drought-sensitive wheat cultivars. These results suggest the involvement of expansin in cell elongation and the drought resistance of wheat.
机译：水分胁迫抑制了植物的生长。扩展蛋白是一种细胞壁蛋白，通常被认为是植物生长过程中细胞壁延伸的关键调节剂。在这项研究中，我们使用了两个不同的小麦品种来研究扩展酶在抗旱性中的作用。实验中以小麦胚芽鞘为原料。我们的结果表明，水分胁迫导致酸性pH依赖性细胞壁延伸增加，这与扩张蛋白活性有关。然而，水分胁迫抑制了胚芽鞘伸长的增长。扩张蛋白活性的提高主要是由于水分胁迫上调了扩张蛋白的表达，但水分胁迫也导致细胞壁酸性降低，而酸性是细胞壁扩展的不利因素。水分胁迫下细胞壁的碱化与质膜H〜+ -ATPase活性的降低有关。在正常和水分胁迫条件下，HF9703（一种耐旱的小麦品种）中的expansin活性始终高于921842（一种对干旱敏感的小麦品种）中的expansin活性，这可能与expansin蛋白表达和质膜的较高表达有关。在HF9703和921842中观察到H〜+ -ATPase活性。但是，水分胁迫并没有改变小麦细胞壁对弹性蛋白的敏感性，并且在耐旱和干旱敏感的小麦品种之间没有观察到这种敏感性的差异。这些结果表明，扩展酶参与小麦的细胞伸长和抗旱性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号