一个依赖的氧气传感途径调节了植物根液压系统
Zaigham Shahzad1, Matthieu Canut2, Colette Tournaire-Roux1
1Biochimie et Physiologie Moléculaire des Plantes, UMR5004, INRA/CNRS/Montpellier SupAgro/Université Montpellier, 34060 Montpellier, France.
Cell
|September 20, 2016
概括
植物通过调节根液压导电性来适应低氧气. HCR1基因控制着这个过程,集成土壤信号,如和氧气,以增强在洪水期间的弹性.
科学领域:
- 植物生理学 植物生理学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 有氧生物具有分子,代谢和生理反应,以生存低氧 (O2).
- 在O2缺乏的植物中,根水的透性 (液压导电性,Lpr) 通常会降低.
- 了解植物适应低氧的遗传基础对于作物弹性至关重要.
研究的目的:
- 为了确定控制根液压导电性在低氧条件下的基因在Arabidopsis.
- 阐明植物在响应环境信号时调节Lpr的分子机制.
- 研究特定基因在植物适应洪水中的作用.
主要方法:
- 在Arabidopsis中使用定量遗传学方法来克隆HCR1基因.
- 在不同氧气和 (K+) 水平下分析HCR1基因表达和功能.
- 研究HCR1对Lpr和缺氧反应基因的调控作用,包括RAP2.12.
主要成果:
- 根1的液压导电性 (HCR1) 基因被克隆,并被确定为一个类似Raf的MAPKKK.
- HCR1对Lpr进行负控制,并在O2限制和K+充足度的结合下积累.
- HCR1通过控制转录调节器RAP2.12.12来调节Lpr和低氧反应基因.
- 在阿拉比多普西斯物种中,HCR1对Lpr的调节存在显著的差异.
结论:
- HCR1集成土壤信号,特别是K+和O2的可用性,以调节植物的弹性.
- 通过控制根液压导电性,HCR1在植物适应洪水方面发挥着关键作用.
- 在植物中,HCR1基因提供了营养状况和氧气应激反应之间的分子联系.
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