在Marchantia polymorpha中,GLR依赖的和电信号与系统性,基于氧利平的伤口诱导的基因表达不结合
Maite Sanmartín1, Enrique Rojo2, Andrzej Kurenda3
1Instituto de Biología Molecular y Celular de Plantas, Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, Valencia, 46022, Spain.
The New phytologist
|May 10, 2024
概括
非血管植物如Marchantia polymorpha表现出伤口诱导的电和信号,类似于血管植物. 然而,由于缺乏血管系统,这些信号不会在M. polymorpha中触发系统性防御反应.
科学领域:
- 植物生物学 植物生物学
- 进化生物学是进化的生物学.
- 植物的信号传输.
背景情况:
- 血管植物 (芽植物) 使用血管系统传递伤口信号,激活全身防御反应.
- 类似谷氨酸受体 (GLR) 的通道对于Arabidopsis thaliana受伤的电气和信号发送至关重要.
- 非血管植物的系统性防御反应在很大程度上仍然没有特征.
研究的目的:
- 调查非血管植物Marchantia polymorpha.的系统性伤口诱导信号的存在和演变.
- 确定 MpGLR,唯一的谷氨酸受体类似通道,在调解这些反应中的作用.
- 为了比较非血管和血管植物之间的系统信号机制.
主要方法:
- 机械伤害的M.多态的叶子.
- 测量电信号和细胞质 ([Ca2+]cyt) 波.
- 对MpGLR基因的功能分析.
- 分析远端组织中氧利平的积累和基因表达.
主要成果:
- 在M. polymorpha中,机械伤害诱导了电信号和[Ca2+]细胞波,传播到远部组织.
- MpGLR活动对于这些伤口诱导信号的系统传输至关重要.
- 与血管植物不同,M. polymorpha中的信号传播与远端组织中氧利平的积累或转录防御激活无关.
结论:
- 马克兰蒂亚多态植物具有受伤诱导的电气和信号传递能力,与血管植物保持一致.
- 在M. polymorpha中缺乏血管系统可能会限制完全系统性防御激活所需的额外因素的转移.
- 这表明血管系在气管细胞中强大的全身防御机制的进化中起着关键作用.
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