快速传播的Ca2+波和电信号在肝草 Marchantia多态
Kenshiro Watanabe1, Kenji Hashimoto1, Kota Hasegawa1
1Department of Applied Biological Science, Tokyo University of Science, Noda, Chiba 278-8510, Japan.
Plant & cell physiology
|January 9, 2024
概括
非血管植物如肝可以在受伤时传输远距离 (Ca2+) 和电信号,类似于血管植物. 这种快速信号传递涉及谷氨酸受体类 (GLR) 通道,表明古代的进化起源.
科学领域:
- 植物生物学 植物生物学
- 细胞信号传输 细胞信号传输
- 进化生物学 进化生物学
背景情况:
- 血管植物利用远距离的Ca2+和电信号来应对压力,主要是通过血管捆.
- 现有的植物远距离信号传输模型侧重于血管组织的作用.
研究的目的:
- 研究非血管植物中的远距离信号传递机制,特别是肝草Marchantia polymorpha.
- 确定Ca2+波和电信号是否可以在没有血管组织的情况下传播,并确定涉及的分子组件.
主要方法:
- 在Marchantia polymorpha上进行伤害实验,以诱导Ca2+波和电信号.
- 使用La3+和四甲基化测量信号传播速度和抑制研究.
- 同时记录Ca2+和电信号,加上对离子通道的分子遗传分析,包括GLR通道.
主要成果:
- 在受伤的反应中,Marchantia polymorpha以1-2毫米/秒的速度传播Ca2+波和电信号,与血管植物相似.
- 信号传播取决于Ca2+和K+通道,并且Ca2+动态和电信号之间紧密相结合.
- 酸盐受体样 (GLR) 通道对于信号传播至关重要,而双孔通道不参与.
结论:
- 快速,远距离的Ca2+和电信号传播发生在非血管植物中,挑战了这种过程需要血管组织的必要性.
- 这些发现突显了GLR通道在陆地植物进化过程中的植物压力信号传递中的保留作用.
- 这项研究提供了关于植物早于血管组织的快速细胞间通信的古代起源的见解.
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