微生物多样化在一个经过实验进化的合成社区中得到维持
Zahraa Al-Tameemi1, Alejandra Rodríguez-Verdugo1
1Department of Ecology and Evolutionary Biology, University of California, Irvine, Irvine, California, USA.
mSystems
|October 15, 2024
概括
细菌物种在与另一种物种相互作用时多样化为两种形态型,这种模式在隔离的情况下并未见到. 跨物种相互作用,如交叉养,对于微生物多样化和社区结构至关重要.
科学领域:
- 微生物生态学 微生物生态学
- 进化生物学 进化生物学
- 细菌学 细菌学是一门学科.
背景情况:
- 在自然界中,细菌存在于复杂的群体中,并参与诸如交叉养之类的相互作用.
- 这些相互作用对细菌多样化模式的影响尚不清楚.
研究的目的:
- 调查与*Acinetobacter johnsonii*的交叉食相互作用如何影响*Pseudomonas putida*的多样化.
- 为了比较P. putida在单一培养和共同培养中的进化轨迹.
主要方法:
- 在单一培养和与A. johnsonii共同培养中对*P. putida*的实验进化进行了200代.
- 基因组分析以确定突变,包括在*fleQ*基因中的突变.
- 侵略实验和进化"重播"实验,以评估共存动态.
主要成果:
- *P. putida* 在共同培养中多样化为两种形态型,以单点突变不同,包括在 *fleQ*.
- 导致改变运动性和生物膜形成的突变,如在*fleQ*中,在单一种植中被扫到固定,但在共同种植中没有.
- *Acinetobacter johnsonii*的存在稳定了两种P. putida形态型的共存.
结论:
- 跨物种相互作用,特别是交叉养,显著塑造微生物多样化模式.
- 交叉养伙伴的存在可以防止某些突变的固定,并促进不同血统的稳定共存.
- 这些发现强调了考虑物种相互作用在理解微生物社区进化中的重要性.
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