...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plant Physiology >Salt Modulates Gravity Signaling Pathway to Regulate Growth Direction of Primary Roots in Arabidopsis1,[C]
【24h】

Salt Modulates Gravity Signaling Pathway to Regulate Growth Direction of Primary Roots in Arabidopsis1,[C]

机译：盐调节拟南芥中主要根的生长方向的重力信号通路，[C]

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

Plant root architecture is highly plastic during development and can adapt to many environmental stresses. The proper distribution of roots within the soil under various conditions such as salinity, water deficit, and nutrient deficiency greatly affects plant survival. Salinity profoundly affects the root system architecture of Arabidopsis (Arabidopsis thaliana). However, despite the inhibitory effects of salinity on root length and the number of roots, very little is known concerning influence of salinity on root growth direction and the underlying mechanisms. Here we show that salt modulates root growth direction by reducing the gravity response. Exposure to salt stress causes rapid degradation of amyloplasts in root columella cells of Arabidopsis. The altered root growth direction in response to salt was found to be correlated with PIN-FORMED2 (PIN2) messenger RNA abundance and expression and localization of the protein. Furthermore, responsiveness to gravity of salt overly sensitive (sos) mutants is substantially reduced, indicating that salt-induced altered gravitropism of root growth is mediated by ion disequilibrium. Mutation of SOS genes also leads to reduced amyloplast degradation in root tip columella cells and the defects in PIN2 gene expression in response to salt stress. These results indicate that the SOS pathway may mediate the decrease of PIN2 messenger RNA in salinity-induced modification of gravitropic response in Arabidopsis roots. Our findings provide new insights into the development of a root system necessary for plant adaptation to high salinity and implicate an important role of the SOS signaling pathway in this process.
机译：植物根结构在开发过程中具有很高的可塑性，可以适应许多环境压力。在盐分，水分缺乏和营养缺乏等各种条件下，土壤中根的正确分布极大地影响了植物的存活。盐度深刻影响拟南芥（Arabidopsis thaliana）的根系结构。然而，尽管盐度对根长和根数有抑制作用，但关于盐度对根生长方向和潜在机理的影响知之甚少。在这里，我们显示盐通过减少重力响应来调节根的生长方向。暴露于盐胁迫下会导致拟南芥根小肠细胞中的淀粉体迅速降解。发现响应于盐改变的根生长方向与PIN-FORMED2（PIN2）信使RNA丰度以及该蛋白的表达和定位相关。此外，盐对高度敏感的（sos）突变体对重力的响应能力大大降低，表明盐诱导的根系生长引力变化是由离子不平衡介导的。 SOS基因的突变还导致根尖小肠细胞淀粉样体降解减少，以及响应盐胁迫的PIN2基因表达缺陷。这些结果表明，SOS途径可能介导了盐度诱导的拟南芥根的重力反应修饰中PIN2信使RNA的减少。我们的发现为植物适应高盐分所必需的根系的发展提供了新的见识，并暗示了SOS信号通路在这一过程中的重要作用。

著录项

  • 来源
    《Plant Physiology》 |2008年第1期|p.178-188|共11页
  • 作者

    Feifei Sun2 Wensheng Zhang2 Haizhou Hu Bao Li Youning Wang Yankun Zhao Kexue Li Mengyu Liu and Xia Li*;

  • 作者单位

    State Key Laboratory of Plant Cell and Chromosome Engineering, Center of Agricultural Resources, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, Hebei 050021, China (F.S., W.Z., H.H., Y.W., Y.Z., K.L., M.L., X.L.);

    and Graduate University of Chinese Academy of Sciences, Beijing 100039, People's Republic of China (Y.W., Y.Z.);

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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