在Pectobacterium属内有两种具有特殊进化的物种,表明它们适应了新的环境利基
Hajar Ben Moussa1, Jacques Pédron1, Nicole Hugouvieux-Cotte-Pattat2
1Sorbonne Université, INRAE, IRD, CNRS, UPEC, UMR 7618 Institut d'Écologie et des Sciences de l'Environnement de Paris, Paris, France.
Environmental microbiology
|August 7, 2023
概括
两种水生Pectobacterium物种显示基因组减少和基因丢失,影响营养物质运输和毒性. 这些发现表明,与植物相关的软腐烂乳杆菌相比,这些居住在水中的细菌具有独特的生态利基.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 进化生物学 进化生物学
背景情况:
- 软腐烂乳杆菌 (SRP) 研究传统上侧重于植物病原体.
- 在植物环境之外对SRP的知识是有限的.
- 两种新型水生物种,Pectobacterium aquaticum和Pectobacterium quasiaquaticum,已经从水中分离出来.
研究的目的:
- 为了确定P. aquaticum和P. quasiaquaticum的独特基因组和表型特征.
- 为了将这些水生物种与其他19种Pectobacterium物种进行比较.
- 了解它们的进化分歧和潜在的生态利基.
主要方法:
- 对80个Pectobacterium基因组进行比较基因组分析.
- 进化的重建.
- 使用COG分析进行功能注释.
- 现型分析包括乳溶解活性,生物膜形成,运动性和毒性测定.
主要成果:
- P. aquaticum和P. quasiaquaticum表现出基因组缩小和高伪基因含量.
- 观察到显著的基因损失,特别是在营养物质运输系统和II型分泌蛋白质中.
- 现型分析显示,花粉分解活性降低,生物膜形成受损,运动性高,植物毒性降低.
结论:
- 基因组和表型数据表明P.aquaticum和P.quasiaquaticum具有不同的特征.
- 这些水生物种可能占据了与其他Pectobacterium物种不同的生态利基.
- 这项研究强调了研究细菌超出它们传统宿主环境的重要性.
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