代谢资源的重叠影响了植物圈细菌之间的竞争
Rudolf O Schlechter1,2,3,4, Evan J Kear5, Michał Bernach6,5,7,8
1Institute of Microbiology and Dahlem Centre of Plant Sciences, Department of Biology, Chemistry, Pharmacy, Freie Universität Berlin, Berlin, Germany. r.schlechter.jahn@fu-berlin.de.
The ISME journal
|June 24, 2023
概括
植物界中的细菌竞争受到资源重叠和原生学的影响. 叶面的空间异质性削弱了竞争,允许多样化的微生物群落壮成长.
科学领域:
- 微生物生态学 微生物生态学
- 植物与细菌之间的相互作用
- 系统生物学 系统生物学
背景情况:
- 植物圈是密集的微生物群落,尽管资源有限.
- 资源竞争是微生物社区结构的关键驱动因素,影响细菌排除或共存.
- 了解这些动态对于预测植物表面微生物社区聚集至关重要.
研究的目的:
- 调查资源竞争对模型植物 *Pantoea eucalypti* 299R (Pe299R) 的生长的影响.
- 确定资源重叠和遗传学关系在细菌竞争结果中的作用.
- 评估叶子的空间异质性对竞争互动的影响.
主要方法:
- 基因组规模的代谢建模,以预测细菌菌株之间的资源重叠.
- 双对竞争实验在体外和Arabidopsis thaliana植物界进行.
- 单细胞分辨率分析生长动态和生殖成功.
主要成果:
- 确定了十个关键资源,足以解释Pe299R.R.的适用性.
- 资源重叠和遗传关系都影响了竞争结果,但在植物界的竞争比体外竞争更弱.
- 叶子环境的空间异质性减轻了资源竞争对型细菌成功的影响.
- 竞争对手影响了Pe299R亚群,导致了不同的生命史和细胞分裂.
结论:
- 由于空间异质性,植物界的细菌竞争比体外竞争要少.
- 资源竞争和家族遗传关系是表虫细菌繁殖成功的弱预测因素.
- 除了资源竞争之外的因素在异构的植物圈环境中显著塑造了细菌社区结构.
- 这项研究为预测复杂的植物相关生态系统中的微生物竞争提供了一个框架.
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