一个小酸APP3-14通过调节植物MYC2-介导的嗅觉防御来破坏病原体-昆虫相互关系
Pingzhi Zhao1, Yanwei Sun2, Xiaoyue Chen3
1State Key Laboratory of Microbial Diversity and Innovative Utilization, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China; CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, China.
Plant communications
|October 8, 2025
概括
绿病 (黄龙) 细菌使用效应剂SDE5抑制植物防御,吸引昆虫载体. 这一发现提供了通过操纵植物气味来破坏病原体-载体相互作用的新策略.
科学领域:
- 植物病理学 植物病理学
- 昆虫与植物的相互作用
- 分子生物学分子生物学
背景情况:
- 昆虫传播的植物病原体操纵宿主植物以增强载体的吸引力.
- 黄龙 (HLB) 是一种由"亚洲候选菌" (Candidatus Liberibacter asiaticus,CLas) 引起的类病,由虫载体传播.
- 感染植物吸引载体的机制尚不清楚.
研究的目的:
- 为了研究CLas如何影响psyllid载体的吸引力.
- 阐明CLas效应蛋白SDE5在这个过程中的作用.
- 为了确定破坏CLas-psyllid相互作用的潜在目标.
主要方法:
- 研究了类植物中CLas效应因子SDE5的功能.
- 分析了SDE5与植物蛋白的相互作用,包括MYC2和E3连接酶 (PUB10,PUB21).
- 评估了SDE5对挥发性类生物合成和类生物行为的影响.
- 使用了转基因果品种,并测试了抗蛋白质溶解3-14 (APP 3-14) 的作用.
主要成果:
- 通过降解转录因子MYC2.2,CLas效应因子SDE5抑制类植物中挥发性类生物合成.
- SDE5抑制MYC2二分化及其激活基因的能力,降低植物的防御能力.
- 这种抑制增加了psyllid吸引力和健身,而APP 3-14则具有相反的效果.
结论:
- 通过抑制植物的嗅觉防御,SDE5是CLas介导的psyllid载体吸引的一个关键因素.
- 针对SDE5或MYC2降解提供了一种新的策略来控制HLB传播.
- 调节植物挥发性排放可以破坏病原体-载体相互关系.
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