通过AVP1介导的酸盐稳定协调在叶子生长过程中依赖的纤维素合成和自身免疫
Chen Fu1, Zhihang Feng1, Xu Teng1
1State Key Laboratory of Soil Pollution Control and Safety, Zhejiang University, Hangzhou 310058, China; MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
Developmental cell
|February 6, 2026
概括
缺乏会通过破坏纤维素合成和触发自身免疫反应来阻碍植物生长. 在低条件下维持生长,AVP1调节的酸盐稳定是关键.
科学领域:
- 植物生物学 植物生物学
- 分子植物生理学分子植物生理学
- 植物免疫力 植物免疫力
背景情况:
- (Ca) 对植物生长和免疫反应至关重要,但其机制尚未完全理解.
- 细胞质无机酸盐 (PPi) 水平受到严格监管,影响细胞过程.
- 植物自身免疫反应可以抑制生长,特别是在压力下.
研究的目的:
- 阐明阿拉比多普西斯真空H+-pyrophosphatase (AVP1) 在调节细胞质PPi恒温中的作用.
- 为了研究Ca缺乏如何影响AVP1,PPi水平,以及随后的植物生长.
- 探索PPi新陈代谢,纤维素合成,自身免疫和叶子发育之间的联系.
主要方法:
- 研究了Ca缺乏对Arabidopsis中AVP1丰度的影响.
- 评估了改变PPi水平对微管组装和纤维素合成的影响.
- 在低Ca条件下分析了酸的产生和自身免疫反应.
- 研究了番茄中这些机制的保存.
主要成果:
- 甲酸缺乏会降低AVP1,导致细胞质PPi增加.
- 升高的PPi会损害微管组合和纤维素合成,破坏细胞壁.
- 细胞壁缺陷触发了酸的产生和自身免疫反应,抑制了叶子的生长.
- 基因增强PPi水解可以提高对低Ca条件的耐受性.
结论:
- 由AVP1调节的PPi稳态是将Ca可用性与叶子生长和免疫信号联系起来的关键机制.
- 保持PPi平衡抑制自身免疫力,并促进在Ca-限制的环境下生长.
- 这一途径在番茄等作物中得到保护,为改善营养应激弹性提供了目标.
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