转录因子模块WRKY28-BRC1控制了在Brassica napus中发芽的分支
Ka Zhang1, Jinfang Zhang1, Cheng Cui1
1Crop Research Institute, Sichuan Academy of Agricultural Sciences, Environment-Friendly Crop Germplasm Innovation and Genetic Improvement Key Laboratory of Sichuan Province, Chengdu 610066, China.
Plants (Basel, Switzerland)
|February 13, 2025
概括
植物生长涉及防御和分支之间的权衡. 这项研究揭示了 WRKY28 转录因子如何通过抑制 BRC1 基因来调节 Brassica napus 发芽分支,从而影响植物结构.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物生理学 植物生理学
- 遗传学 是一个遗传学.
背景情况:
- 植物平衡生长和防御,这种权衡往往涉及转录因子.
- 在Brassica napus (菜) 中的WRKY28以前被证明可以减少防御,但可以增强芽的分支.
- 对于WRKY28介导的芽分支的精确分子机制仍然不清楚.
研究的目的:
- 为了阐明WRKY28促进Brassica napus中树枝的分子机制.
- 为了识别BnaA03.WRKY28调节的目标基因,这些基因参与了芽生长的分支.
- 为了研究酸 (ABA) 在WRKY28调节的分支中的作用.
主要方法:
- 在Brassica napus.的叶轴中分析BRC1基因表达.
- 在BRC1促进区域中识别W-box cis-acting元素.
- 在CRISPR/Cas9中介的过程中,BRC1基因被淘汰 (BnaA01.BRC1,BnaC01.BRC1,BnaC03.BRC1).
- 定量实时PCR用于评估基因表达水平 (NCED3,CYP707A3).
主要成果:
- BnaA03.WRKY28直接与BnaA01.BRC1,BnaC01.BRC1和BnaC03.BRC1.1的表达结合并抑制它们的表达.
- 这三个BRC1基因的同时淘汰导致了过度的芽分支.
- 突变者显示ABA生物合成基因NCED3的表达减少,ABA催化基因CYP707A3.3.的表达增加.
- 这表明ABA介导的芽休眠释放有助于过度分支.
结论:
- 转录因子模块WRKY28-BRC1在调节菜中芽枝分的过程中起着关键作用.
- WRKY28通过降低BRC1表达的调节来促进分支,可能通过改变ABA信号.
- 这为了解植物架构在响应环境线索时的发展提供了分子基础.
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