多种毒素和一种蛋白酶有助于Pseudomonas fluorescens PpR24的虫杀伤能力
Deepa Paliwal1, Mojgan Rabiey2, Tim H Mauchline3
1School of Biological Sciences, University of Reading, Reading, UK.
Environmental microbiology
|April 2, 2024
概括
色虫 Pseudomonas fluorescens PpR24 通过产生杀虫毒素,有效地杀死耐杀虫剂的虫. 这项研究确定了关键的毒性基因,如AprX,对这种生物控制活动至关重要.
科学领域:
- 微生物生态学 微生物生态学
- 昆虫病理学 昆虫病理学
- 基因组学就是基因组学.
背景情况:
- 虫是重要的农业害虫,造成广泛的作物损害.
- 虫的抗杀虫剂耐药性需要开发替代的害虫控制策略.
- 光虫Pseudomonas PpR24已经显示出口腔感染和杀死抗杀虫剂的绿色桃花的潜力.
研究的目的:
- 为了阐明 Pseudomonas fluorescens PpR24 对虫的杀虫能力的遗传基础.
- 为了确定特定的毒性因素和参与虫死亡的细菌基因.
- 了解宿主-病原体相互作用背后的分子机制.
主要方法:
- 测序 Pseudomonas fluorescens PpR24 的基因组,以确定潜在的杀虫毒素.
- 在感染期间对虫和PpR24进行RNA-Seq分析,以评估基因表达变化.
- 在PpR24中对候选病毒性基因进行基因删除实验 (单击和双击).
- 在虫杀死中分泌的蛋白酶AprX和毒素成分的作用的功能分析.
主要成果:
- PpR24基因组含有毒素复合体 (Tc),Rhs元素和杀虫蛋白酶的基因.
- 由PpR24感染虫导致193个虫基因的差异表达,包括排毒基因的下调.
- 转录组分析揭示了1325个PpR24基因的差异表达,包括那些参与二次新陈代谢,应激反应和毒性的人.
- 删除候选毒性基因 (AprX和四种毒素组成部分) 显著影响了虫杀死,其中AprX特别重要.
结论:
- 这项研究提供了对Pseudomonas fluorescens PpR24介导的虫死亡率的分子基础的全面了解.
- 关键的毒性因素,包括AprX和特定的毒素成分,被确定为PpR24杀虫活性的关键因素.
- 伪虫光体PpR24显示出作为一种有效和新的生物控制剂的巨大潜力,用于控制虫害.
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