抗捕食性伪omonas细菌与社会虫Dictyostelium discoideum进行共生式的行为
Margaret I Steele1, Jessica M Peiser2, P M Shreenidhi2
1Biology Department, Washington University in St. Louis, St. Louis, MO, USA. msteele@wustl.edu.
The ISME journal
|October 26, 2023
概括
一些土壤细菌可以逃避Dictyostelium discoideum amoeba的掠食. 基因组分析揭示了Pseudomonas菌株的多样性耐药机制,这表明每个血统都有独特的生存策略.
科学领域:
- 微生物学 微生物学
- 生态生态学 生态生态学
- 基因组学就是基因组学.
背景情况:
- 土壤虫Dictyostelium discoideum是各种细菌的捕食者和宿主.
- 了解细菌与D. discoideum的相互作用对于土壤生态系统动态至关重要.
研究的目的:
- 调查从D. discoideum中分离的Pseudomonas菌株的掠食性耐药性和果实体感染能力.
- 为了识别导致细菌生存的遗传因素,对抗阿米虫的掠食.
主要方法:
- 从野生D. discoideum中分离并测试了十五种Pseudomonas菌株.
- 评估细菌的掠食性耐药性和果实体感染.
- 全基因组测序抗掠食性分离物.
主要成果:
- 三种Pseudomonas菌株表现出对掠食的抵抗力,并导致D. discoideum果实体的细胞外感染.
- 一种菌株诱导了二次感染,并抑制了其他细菌的掠食.
- 一种独特的菌株在菌中持续存在于细胞内.
- 基因组分析显示,抗捕食性分离物不是单体,有分泌系统,毒素和二次代谢物基因集群的多样存在.
结论:
- 伪omonas菌株采用不同的策略来抵抗D. discoideum的掠食.
- 已知耐药基因的分布并不能完全解释差异性食用性.
- 每个细菌系都可能拥有独特的机制,以幸存阿米虫掠食.
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