硫化通过对SnRK1α激酶的再硫化促进桃子的横向根形成
Xuelian Wu1, Anqi Du1, Jiahui Liang1
1College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, China.
Plant biotechnology journal
|July 4, 2025
概括
硫化 (H2S) 通过激活糖分非发酵相关基因酶1 (SnRK1) 来增强桃子根的生长. 这种激酶通过与LATERAL ORGAN BOUNDARIES DOMAIN 16 (LBD16) 相互作用,促进横向根的形成.
科学领域:
- 植物生理学 植物生理学
- 分子生物学分子生物学
- 园艺科学 园艺科学
背景情况:
- 根部的发育对于作物产量至关重要.
- 硫化 (H2S) 是一种调节植物生长的气传递物.
- 桃子侧根 (LR) 形成中的H2S的确切机制是未知的.
研究的目的:
- 阐明H2S在桃子根发育中的作用.
- 为了识别介导H2S诱导LR形成的分子参与者.
- 了解H2S与能量代谢信号之间的相互作用.
主要方法:
- 研究了H2S对桃子根生长和PpSnRK1活性的影响.
- 在特定的氨酸残留物中分析了PpSnRK1的H2S诱导的持续硫化.
- 使用分子和遗传技术研究了PpSnRK1和PpLBD16之间的相互作用,以及它们对下游基因 (PpCNGC1,PpEXPB2) 的影响.
主要成果:
- H2S治疗增加了桃子根中的PpSnRK1活性,促进了LR的形成.
- 在PpSnRK1α中对Cys419,Cys430和Cys505的H2S再硫化对其活性至关重要.
- PpSnRK1α与PpLBD16相互作用,增强PpCNGC1和PpEXPB2的转录,这对H2S诱导的LR发展至关重要.
结论:
- 这项研究揭示了一种新的信号通路,其中H2S通过化激活PpSnRK1.
- H2S-PpSnRK1-PpLBD16模块对于调节桃子横向根启动至关重要.
- 研究结果提供了关于H2S如何塑造园艺作物的根结构的机制性见解.
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