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由深度来源的地下水维持的自带生物膜是各种细菌的宿主,这些细菌与硫和代谢有关

Luis E Valentin-Alvarado^1,2, Sirine C Fakra³, Alexander J Probst^4,5

¹Graduate Group in Microbiology, University of California, Berkeley, CA, USA.

|January 25, 2024

概括

硫化泉中的微生物生物膜是各种细菌的宿主,包括CPR细菌. 这些社区通过复杂的共生关系在硫和循环中发挥关键作用.

科学领域:

微生物学微生物学
地质化学地质化学
生物地质化学循环过程

背景情况:

硫化物丰富的泉源中的生物膜为生物地化学循环提供了必不可少的复杂微生物群落.
基于化学自营养的生物膜是各种候选细胞辐射 (CPR) 细菌的宿主,并在硫循环中发挥关键作用.

研究的目的:

研究硫化物丰富的春季生物膜中生物地化学循环的微生物控制.
描述CPR细菌和相关微生物在硫和循环中的作用.

主要方法:

基因组解析的元基因组学来分析微生物社区的组成和功能.
扫描传输X射线显微镜 (STXM) 和NEXAFS光谱仪用于元素分析和细胞成像.
大量地质化学分析以了解化学环境.

主要成果:

化学性硫氧化细菌 (例如,Thiothrix,Begiatoa) 和各种CPR细菌 (例如,Gracilibacteria,Absconditabacteria) 的优势.
STXM揭示了潜在的CPR细菌副生物体,并在线状细菌中确定了元素硫颗粒,表明硫氧化.
基因组分析预测了CPR和其他细菌的新酶和硫代谢途径,表明了神秘的硫循环和共生.

结论:

硫化泉中的生物膜是CPR细菌和硫氧化蛋白质细菌的复杂联盟的宿主.
据推断,CPR细菌在这些生态系统中的硫和循环中起着重要作用.
这项研究突出了复杂的微生物相互作用和代谢途径,推动了极端环境中的生物地球化学过程.

关键词:

候选类型的辐射辐射地下水的微生物群.基于同步离子子的光谱显微镜.

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