陆地植物内共生介导的核信号的演变
Anson H C Lam1, Aisling Cooke1, Hannah Wright1
1John Innes Centre, Cell and Developmental Biology Department, Norwich Research Park, Norwich NR4 7UH, UK.
Current biology : CB
|April 20, 2024
概括
树枝状菌根 (AM) 的共生,对于植物的营养吸收至关重要,涉及核信号. 这项研究表明,这些信号保留在肝中,但与开花植物的功能不同,揭示了共生信号的进化分歧.
科学领域:
- 植物和真菌的共生是植物的共生.
- 信号通路的演变信号通路的演变
- 分子植物病理学 分子植物病理学
背景情况:
- 树枝状菌根 (AM) 共生是一种广泛的植物-真菌协会,对陆地生态系统中营养获取至关重要.
- 植物根中的核信号对于在开花植物中建立AM至关重要.
- 在缺乏根系的早期陆地植物中,对这些信号的需求仍然未被探索.
研究的目的:
- 研究早期陆地植物肝草Marchia paleacea中交生体诱导的核信号的功能性保存.
- 为了比较M. paleacea和开花植物Medicago truncatula之间AM共生中的离子通道DMI1的作用和调节.
主要方法:
- 研究了AM真菌发芽液 (GSE) 对M. paleacea rhizoids的核信号的影响.
- 利用遗传分析来确定核局部离子通道MpaDMI1在M. paleacea AM共生中的作用.
- 在M. paleacea和M. truncatula之间比较了DMI1调节机制.
主要成果:
- 在M. paleacea rhizoids中,GSE激活了核信号,这取决于MpaDMI1.1.
- 在M. paleacea中,MpaDMI1介导的信号对于鱼殖民是必要的,而不是根茎透.
- 在肝和开花植物之间观察到DMI1调节机制的显著差异,包括一个关键的氨基酸残留物.
结论:
- 核信号在肝和开花植物之间的AM共生中功能性地保留,但其特定作用已经演变.
- DMI1的调节有所不同,突出显示了植物微生物信号通路的进化适应.
- 这项研究提供了关于陆地植物内共生信号的早期演变的见解.
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