效应器 PstCFEM2 操纵 TaHA2 和 TaCIPK9 介导的可塑性酸化,以促进小麦的易受性
Yanqin Zhang1,2, Shuangyuan Guo2,3, Longhui Yu1,2
1College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China.
The Plant cell
|February 4, 2026
概括
植物病原体,如条纹生真菌操纵小麦的apoplastic pH 调节. 科学家们发现了一种真菌效应剂,可以激活小麦蛋白 (TaHA2),增加易感性,为疾病抵抗提供新的策略.
科学领域:
- 植物病理学 植物病理学
- 分子植物-微生物相互作用
- 生物化学 生物化学
背景情况:
- 在植物-病原体相互作用中,可塑性酸化至关重要,但其机制尚不清楚.
- 植物的免疫反应往往是通过apoplasticpH调节的.
- 效应物是操纵宿主过程的关键毒性因素.
研究的目的:
- 为了阐明条纹菌的分子机制 (Puccinia striiformis f. sp. ) 操纵宿主的细胞质 pH.
- 识别参与调节细胞质 pH 和植物防御 Pst. 的宿主因素.
- 探索在小麦中设计抗病的策略.
主要方法:
- 小麦PM H+-ATPase (TaHA2) 的鉴定和特征及其在Pst感染中的作用.
- 在小麦中使用过度表达和CRISPR-Cas9基因编辑的基因表达分析和功能研究.
- 生物化学试验调查小麦TaCIPK9,Pst效应物PstCFEM2和TaHA2.2之间的相互作用.
主要成果:
- 小麦TaHA2是细胞质pH的关键调节剂,以及对Pst.的敏感性.
- 在小麦中非活性化TaHA2赋予了对生病原体的广泛耐药性,而不会影响农业特征.
- Pst效应器 PstCFEM2 破坏了宿主激酶介导的 TaHA2 的调节,导致增强的酸化和抑制免疫力.
结论:
- 病原体可以利用宿主pH调节机制感染.
- Pst效应器PstCFEM2通过破坏其抑制酸化来激活TaHA2,从而促进疾病.
- 针对像TaHA2这样的易感基因,为开发持久的作物疾病耐药性提供了一个有希望的途径.
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