微生物传感器在地球深层地表的生物地化学条件中的变化
Annelise L Goldman1, Emily M Fulk2, Lily M Momper3
1Department of Biosciences, Rice University, Houston, Texas, USA.
mSystems
|December 7, 2023
概括
微生物传感器系统,称为双组件系统 (TCS),在深层地下环境中非常丰富. 它们的丰富性与环境因素 (如溶解有机碳和微生物多样性) 相对相关,表明了利基驱动的进化.
科学领域:
- 微生物学 微生物学
- 环境科学 环境科学
- 基因组学就是基因组学.
背景情况:
- 微生物居住在不同的地下环境中,需要适应感知和响应周围环境.
- 细胞外传感器系统,特别是双组件系统 (TCS),对于微生物来说至关重要,它们可以感知环境线索并调节细胞内反应.
研究的目的:
- 为了研究微生物细胞外传感器系统的变化,特别是TCS,在不同的地下.
- 了解环境条件如何影响地球深层微生物传感器系统的进化和丰富性.
主要方法:
- 分析来自多个深矿微生物观测站 (DeMMO) 地下站点的元基因组数据.
- 传感器胺激酶 (HKs) 的量化,TCSs的一个组成部分,跨越不同的地化学和微生物多样性梯度.
主要成果:
- 在所有采样的地下和地表地点检测到由HKs表示的TCS.
- 在地下裂流体中,HK的丰度高于表面流体,与微生物多样性相反相关 (r2 = 0.81).
- HK频率与溶解有机碳 (r2 = 0.82) 呈现出强烈的正相关性,这表明营养素的可用性推动了传感器系统的演变.
结论:
- 生态的非生物和生物性质显著影响微生物传感器系统的多样性和丰富性.
- 在动态营养环境中的微生物可能需要比稳定,低营养环境中的微生物更多样化的TCS.
- 进一步的综合元基因组学和地化学研究对于充分阐明深层地下微生物传感器进化的驱动因素至关重要.
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