"Candidatus Siderophilus nitratireducens":一个假定依赖于睡眠的酸盐降解铁氧化剂,属于新秩序中的Siderophiliales
Francesc Corbera-Rubio1, Gerben R Stouten1, Jantinus Bruins2
1Delft University of Technology, Stevinweg 1, 2628 CN Delft, the Netherlands.
ISME communications
|April 5, 2024
概括
在试点地下水过器中研究了依赖酸盐的氧化铁的细菌. 发现了一种新的细菌类,Siderophiliales,揭示了自然环境中铁和酸盐循环的关键代谢途径.
科学领域:
- 环境微生物学 环境微生物学
- 地质化学 地质化学
- 生物地质化学生物地质化学
背景情况:
- 地下水的酸盐污染越来越令人担忧,影响饮用水质量.
- 酸盐的流入可以刺激无氧地下水中的微生物的铁氧化.
- 在自然环境中,依赖酸盐的氧化铁 (NDFO) 细菌的生态生理学知之甚少.
研究的目的:
- 在寡质条件下,研究富含酸盐的地下水中NDFO微生物组的结构和代谢.
- 为了弥合实验室发现和现实世界NDFO细菌行为之间的差距.
主要方法:
- 使用富含酸盐的地下水建立了一个试点规模的过器.
- 采用基因组解析的元基因组学来分析微生物社区的结构和功能.
- 进行了热力学计算,以评估代谢途径的有利性.
主要成果:
- 飞行员过器社区始终清除铁和酸盐,与NDFO代谢相一致.
- 确定了一种新的细菌类,Siderophiliales,其中"Candidatus Siderophilus nitratireducens"是最丰富的物种.
- 证明了铁氧化与通过周等离子体酸盐还原酶 (NAP) 减少酸盐的能量优势.
结论:
- 这项研究阐明了地下水中依赖铁的非化物和有机异构体之间的代谢相互作用.
- 扩大了已知的NDFO细菌的分类学多样性和生态作用.
- 提供了关于地下水生态系统中酸盐与铁的相互作用的关键见解.
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