一个微生物联盟通过从陆地石撞击坑中丰富的活跃的甲基类甲基生成
Femke van Dam1, George Westmeijer2,3, Maryam Rezaei Somee2,4
1Centre for the Environment (CENWIN), Linnaeus University, Kalmar, Sweden.
mBio
|November 25, 2025
概括
科学家们在瑞典石撞击坑深层液体中发现了微生物的活跃甲生产. 这是这种地点第一个甲基生成的证据,突出显示了极端环境中的古代生命过程.
科学领域:
- 地质微生物学的生物.
- 深层生物圈研究研究 深层生物圈研究
- 天体生物学模拟研究研究.
背景情况:
- 甲基生成是一种原始的新陈代谢,对地球深层生物圈至关重要.
- 石撞击坑是深层微生物生命的潜在热点.
- 活跃的深层岩石托管的甲基生成,特别是甲基变的,记录不够丰富.
研究的目的:
- 为了研究和描述地上的石撞击坑中的活跃甲产量.
- 为了确定微生物群落和代谢途径,负责深层地下液体中甲基生成.
- 探索撞击坑作为古代微生物新陈代谢的环境的重要性.
主要方法:
- 来自Siljan撞击坑400米深的液体中的丰富培养物,瑞典.
- 分析使用包括本土石油在内的各种碳捐赠者生产甲的情况.
- 超基因组和超转录组分析以确定微生物联盟和代谢途径.
- 稳定同位素分析 (δ13C甲醇-甲) 来确认甲基还原路径.
主要成果:
- 已确认土著微生物群体的活性甲生产.
- 确定了一个由*Acetobacterium* sp.主导的财团. KB-1 和 *Candidatus* Methanogranum gryphiswaldense. 这两种类型的植物.
- 仅通过甲基还原途径证明了甲基生成,具有显著的同位素丰富 (高达98.6‰).
- 这是第一次报告在陆地石撞击坑中发现活跃的甲基生物和甲基变性甲基生物.
结论:
- 甲基形甲基生成发生在深层地下环境中,发生在石撞击结构中.
- 石撞击坑可以容纳活跃的,古老的微生物代谢.
- 提供了对深层生物圈过程和潜在的地球外生命类型的洞察.
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