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Erwinia amylovora 类型III分泌系统抑制剂 在现场条件下减少火灾感染
Xiaochen Yuan1, George W Sundin2, Quan Zeng3
1Department of Plant Pathology, Entomology and Microbiology, Iowa State University, Ames, IA 50011.
Phytopathology
|June 21, 2023
概括
像TS108这样的III型分泌系统 (T3SS) 抑制剂有效地控制了果和梨的火灾炎症. 这些化合物向细菌毒性,在现场试验中显著降低了花虫害的发生率.
科学领域:
- 植物病理学 植物病理学
- 细菌学 细菌学是一门学科.
- 分子生物学分子生物学
背景情况:
- 由Erwinia amylovora*引起的火灾是全球果和梨生产的重大经济威胁.
- 第三类分泌系统 (T3SS) 对E. amylovora的毒性至关重要.
- 第三种类型的分泌系统抑制剂提供了一种新的策略,通过向毒性而不影响细菌生长来控制细菌性植物疾病.
研究的目的:
- 研究T3SS抑制剂TS108对*Erwinia amylovora*的作用方式.
- 为了评估TS108在现场条件下管理火灾的有效性.
主要方法:
- 用TS108.8治疗的E. amylovora*的体外基因表达分析.
- 涉及CsrB小RNA和*hrpS*基因的转录后调节研究.
- 在T3SS表达上对TS108的物种特异性评估在*Dickeya dadantii*和*Pseudomonas aeruginosa*.
- 从2015年到2022年,在美国四个州 (MI,NY,OR,CT) 进行了五项独立的实地实验.
主要成果:
- TS108抑制了T3SS regulon基因的表达,包括E. amylovora*中的*hrpL*.
- TS108在转录后对CsrB进行负调节,导致*hrpS*和随后的*hrpL*的抑制.
- TS108表现出特定物种的抑制,只影响E. amylovora的T3SS.
- 实地试验显示,与未经处理的对照组相比,花病发病率降低了96.7%.
结论:
- TS108通过通过CsrB/HrpS/HrpL调节途径对*E. amylovora* T3SS进行下调.
- TS108是一种有前途的,特定物种的T3SS抑制剂,用于有效的火灾防治.
- 这些发现支持开发T3SS抑制剂作为可持续农业战略.
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