在Physcomitrium patens中,基本的发育过程需要由功能冗余的PpROP GTPases提供不同的总活性水平
Aude Le Bail1, Benedikt Kost1, Janina Nüssel1
1Cell Biology, Department of Biology, Friedrich-Alexander-University Erlangen-Nürnberg, 91058, Erlangen, Germany.
The New phytologist
|October 6, 2025
概括
植物的植物RHO (ROP) GTPases对于发育至关重要. 这项研究揭示了PpROPs在细胞增殖和分化中的新功能,突出了它们在植物早期进化中的重要作用.
科学领域:
- 植物分子生物学 植物分子生物学
- 发育生物学是发展生物学.
- 进化生物学是进化的生物学.
背景情况:
- RAS同类 (RHO) GTPases是真核生物中细胞过程的重要调节者.
- 特定于植物的ROP GTPase家族与血管植物一起进化和多样化.
- 非血管植物具有较少的ROP成员,使其功能不太了解.
研究的目的:
- 系统地研究在非血管性中ROP GTPases (PpROPs) 的基本功能.
- 阐明PpROPs在细胞增殖,分化的作用,以及体细胞形成中的作用.
- 了解早期陆地植物中ROP GTPase调节的进化背景.
主要方法:
- 为单个和组合的PpROP基因生成淘汰线.
- 用野生型或突变的PpROP和异质同类物来补充淘汰赛线.
- 诱导PpROP基因过度表达.
主要成果:
- 发现了前所未知的PpROP在细胞增殖,caulonema分化和游戏发育中的功能.
- 证明PpROP函数对GDP/GTP循环和明确的下游信号通路的可变依赖.
- 表明不同的发展过程需要特定的总PpROP活动水平,不一定是个别的PpROP.
结论:
- 在Physcomitrium patens的发展中,PpROPs发挥着至关重要的,以前未被认可的作用.
- PpROP信号是复杂的,涉及不同的下游途径和活动水平.
- 这些发现提供了关于ROP/RHO GTPase调节在早期陆地植物发育中的演变的见解.
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