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虫效应者通过招募防御蛋白来抑制植物免疫力,以处理身体

Qun Liu¹, Anna C M Neefjes¹, Archana Singh²

¹Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK.

Science advances

|July 16, 2025

概括

桃虫使用专门的蛋白质来抑制植物免疫力,通过准称为加工体的细胞结构. 一种植物蛋白质可以对抗这种作用,揭示出一种新的虫抵抗机制.

科学领域:

植物病原体相互作用
分子植物微生物相互作用.
昆虫与植物的相互作用

背景情况:

虫是重要的农业害虫,传播植物病原体.
Myzus persicae (桃子-土豆) 是一种具有广泛宿主范围的通用物种.
虫拥有专门的效应蛋白来操纵宿主植物.

研究的目的:

研究虫效应蛋白在调节植物免疫反应中的作用.
确定虫建立长期食关系的分子机制.
为了揭示植物性抵抗策略,对虫感染.

主要方法:

对虫口腔分泌物和效应蛋白的分析.
聚焦显微镜用于追踪植物细胞内的蛋白质定位.
研究虫CathB蛋白与植物免疫调节器之间的相互作用 (EDS1,PAD4,ADR1).
评估植物蛋白Acd28.9在虫耐药性中的作用.

主要成果:

来自M. persicae口腔分泌物的宿主反应性甲素B (CathB) 蛋白质准植物加工体 (p-body).
虫CathB蛋白质将植物免疫调节器EDS1,PAD4和ADR1招募到p体中,抑制植物的防御.
植物蛋白Acd28.9 (Hsp20家族) 对抗CathB活性,赋予虫耐药性.
确定p体是调节植物免疫力的新网站.

结论:

虫效应蛋白操纵植物细胞机械 (p-body) 来逃避免疫反应.
植物蛋白Acd28.9代表了植物防御虫攻击的关键组成部分.
这项研究揭示了对植物免疫调节和虫植物相互作用的新理解.

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