在无氧湖水中,有氧甲氧化细菌的持续活动是由于代谢的多功能性而导致的
Sina Schorn1,2, Jon S Graf3, Sten Littmann3
1Max Planck Institute for Marine Microbiology, Bremen, Germany. sina.schorn@gu.se.
Nature communications
|June 21, 2024
概括
甲氧化细菌 (MOB) 可以氧化无毒湖水中的甲,可能低估了这些环境的甲沉积能力. 这种无氧活性与发酵和脱过程有关.
科学领域:
- 环境微生物学环境微生物学
- 水生微生物生态学 水生微生物生态学
- 生物地质化学生物地质化学
背景情况:
- 有氧甲氧化细菌 (MOB) 通常在氧-无氧接口中减轻湖面甲排放.
- 无氧湖水中MOB的存在表明了潜在的无氧甲氧化能力.
研究的目的:
- 为了研究MOB的活性和生长在Zug湖的无氧的hypolimnion.
- 通过MOB.确定厌氧甲氧化的机制和速度.
主要方法:
- 在现场测量无氧甲氧化率.
- 单细胞纳米SIMS (纳米级二次离子质谱) 分析.
- 大基因组和大转录组测序.
主要成果:
- 无氧甲氧化率高达0.2μMd−1在无氧低温体中观察到.
- 鉴定出Methylococcales MOB是导致这些发病率的原因.
- 在低氧和无氧条件下观察到类似的甲同化活性.
结论:
- 在无毒条件下,MOB利用基于发酵的甲变质和脱.
- 这种无氧活性解释了MOB在无氧水生息地中的流行.
- 无氧盆地的甲沉积能力在不考虑厌氧MOB活动的情况下可能会被低估.
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