自动活性CNGC15增强了豆类和小麦的根内共生
Nicola M Cook1, Giulia Gobbato1, Catherine N Jacott1,2
1Cell and Developmental Biology Department, John Innes Centre Norwich Research Park, Norwich, UK.
Nature
|January 15, 2025
概括
科学家们发现,核振荡的频率控制着植物的共生. 一种特定的突变物增强了小麦的营养吸收,提供了一种减少肥料使用和提高作物产量的策略.
科学领域:
- 植物生物学 植物生物学
- 分子植物-微生物相互作用
- 生物化学 生物化学
背景情况:
- 植物依赖于营养的获取,通常是通过与状菌根 (AM) 菌和固细菌的共生关系来促进的.
- 这些关键的根内共生体的启动是由根细胞内核 (Ca2+) 度的共生体诱导的振荡引发的.
- 在产生这些Ca2+振荡时,核离子通道,循环核酸通道 (CNGC) 15和不引起感染1 (DMI1) 的精确协调仍然不太清楚.
研究的目的:
- 阐明CNGC15和DMI1在确定共生诱导的核Ca2+振荡中的协调作用.
- 研究核Ca2+振荡频率对共生信号通路和植物反应的影响.
- 探索操纵这些途径用于农业应用的潜力,例如增强作物中的营养获取.
主要方法:
- 一个自动活跃的CNGC15突变体表现出自发的低频Ca2+振荡的特征.
- 分析CNGC15的关门机制和DMI1在核Ca2+振荡中的节奏器作用.
- 在野生类型和突变植物中评估共生表型,包括AM殖民和结节,并随后将特征转移到小麦中.
主要成果:
- CNGC15通过螺旋1门机制调节核Ca2+振荡,而DMI1则作为起器来确定振荡频率.
- Ca2+振荡的频率至关重要:高频率激活了内共生程序,而低频率调节了烯路径.
- 一种能够产生高频和低频的自动活性的cngc15突变体,表现出增加的黄类,增强了AM和根结结交,从而改善了模型植物和田间小麦的营养获取.
结论:
- 核Ca2+振荡频率是植物共生结果的关键决定因素.
- 该cngc15自动活跃突变提供了一种新的策略,以增强有益的植物微生物共生,并改善营养吸收.
- 将cngc15特征转移到小麦等作物上表明了增加农业生产率和减少对无机肥的依赖的有希望的方法.
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