乌斯蒂拉基诺伊迪亚维伦斯通过促进通过效应器SCRE9促进GA生物合成来抑制植物免疫力
Siwen Yu1, Shaoqi Zhang1, Xinhang Zheng2
1College of Plant Protection, Jilin Provincial Key Laboratory of Green Management of Crop Pests and Diseases, Jilin Agricultural University, Changchun, 130118, China.
The New phytologist
|July 28, 2025
概括
菌Ustilaginoidea virens使用一个小效应蛋白,SCRE9,以抑制大米免疫力和促进疾病. SCRE9操纵植物激素和细胞壁松动,以成功感染.
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
- 在真菌病原体的产生过程中.
背景情况:
- 由Ustilaginoidea virens引起的米虚假污染是一种重要的农业疾病.
- 乌.维伦斯感染大米花的机制和克服植物免疫力的机制在很大程度上是未知的.
研究的目的:
- 为了确定Ustilaginoidea virens的关键毒性因素,涉及到米花的感染.
- 阐明U. virens抑制大米免疫反应并促进殖民化的分子机制.
主要方法:
- 研究了来自U. virens的小氨酸丰富的效应因子 (SCRE9) 在米病变发生过程中的作用.
- 分析了SCRE9与米蛋白OsSIP1,OsMADS63和OsMADS68.8的相互作用.
- 评估了SCRE9对植物免疫反应,吉伯雷林 (GA) 生物合成和扩大基因表达的影响.
主要成果:
- SCRE9被确定为一种关键的毒性因子,抑制了大米免疫力和抗假污染的抵抗力.
- SCRE9诱导了expansin和gibberellin (GA) 生物合成基因的表达,增加了GA含量.
- SCRE9操纵质细胞局部化的OsSIP1,将转录因子 (OsMADS63/68) 转移到核中,促进GA生物合成.
结论:
- SCRE9促进GA生物合成和花中的细胞壁松动,帮助U. virens感染.
- 这种效应器驱动的策略允许U. virens在没有细胞壁降解酶的情况下克服物理障碍.
- 这项研究揭示了U. virens在花中使用的新型感染机制.
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