在植物中通过富含白素的重复受体类激酶来感知氨酸
Anuphon Laohavisit1, Takanori Wakatake1,2, Nobuaki Ishihama1
1RIKEN Center for Sustainable Resource Science, Yokohama, Japan.
Nature
|September 4, 2020
概括
植物通过涉及CARD1受体激酶的信号通路感知. 这一发现揭示了植物免疫力和寄生植物的发展.
科学领域:
- 植物生物学 植物生物学
- 分子信号传输的方法
- 生物化学 生物化学
背景情况:
- 昆是所有生命形式中发现的重要分子.
- 它们在植物,特别是非寄生物种中的信号作用尚不清楚.
- 众所周知,寄生植物-haustorium的发展涉及诸如DMBQ. quinones之类的类.
研究的目的:
- 为了研究子 (DMBQ) 在Arabidopsis thaliana中感应的机制.
- 为了识别参与子信号传递的植物受体.
- 探索子信号传递在植物免疫力和寄生植物发展中的作用.
主要方法:
- 在Arabidopsis中进行前置基因选,以分离不响应DMBQ的突变体 (卡片1).
- 编码含有白蛋白丰富的重复受体类激酶的CARD1基因的特征.
- 对DMBQ诱导的信号和防御基因表达在野生类型和卡1突变植物中的分析.
- 使用寄生植物Phtheirospermum japonicum的CARD1同类的补充研究.
主要成果:
- 在Arabidopsis中,DMBQ信号传递是通过细胞质Ca2+升高发生的.
- CARD1基因对DMBQ感知和植物免疫力至关重要.
- 卡片1突变体表现出对细菌病原体的防御反应受损.
- 在寄生植物P. japonicum中,DMBQ信号和CARD1对于haustorium的发展至关重要.
结论:
- 植物利用氨酸丰富的重复受体类激酶 (如CARD1) 进行子信号传递,这种机制与动物和细菌不同.
- 在寄生和非寄生植物中,CARD1在调解DMBQ诱导的信号中起着保留的作用.
- 这项研究阐明了昆信号传递在植物免疫力和寄生植物与宿主相互作用中的新角色.
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