冠状岩管中的微生物居民:来自火星模拟环境的天体生物学见解
Ana Z Miller1,2, José L González-Pimentel1,2, José M De la Rosa1
1Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas (IRNAS-CSIC), Sevilla, Spain.
Astrobiology
|January 23, 2026
概括
这项研究探索了岩管作为火星同类物,识别了多样化的微生物和有机物质. 这些发现揭示了生物签名的潜力,这对未来的地球外生命探测任务至关重要.
科学领域:
- 天体生物学 天体生物学
- 地质微生物学的生物.
- 行星科学 行星科学
背景情况:
- 岩管是探测外星生命的关键目标,特别是在火星上.
- 兰萨罗特岛的Corona Lava Tube系统作为火星地下环境和宇航员培训的重要模拟器.
- 欧洲航天局 (ESA) 的行星模拟地质和天体生物学演习飞行员 (PANGAEA) 计划利用这些地点.
研究的目的:
- 研究火山岩管系统内有机丰富的涂层和矿物沉积物的生物签名潜力.
- 分析在PANGAEA-X活动期间收集的样本的微生物多样性和有机地化学.
- 评估用于天体生物学探索的综合现场和实验室分析的有效性.
主要方法:
- 在实地实时DNA测序 (MinION Nanopore) 与基于实验室的测序 (Illumina MiSeq) 结合.
- 利用显微镜,X射线粉碎衍射,X射线光用于矿物学分析.
- 采用气体染色学/质谱学,13C核磁共振光谱学和热重力测量用于有机地化学.
主要成果:
- 一个有机丰富的涂层 (CLT1) 容纳了有氧耐受性和碳化合物降解细菌,含有诸如烯和三烯酸等生物标志物.
- 矿产沉积物 (CLT3),主要是石膏,含有酸性细菌,如阿利西克洛巴西勒.
- 验证了实时微生物多样性数据,并扩大了对有机物转化的理解.
结论:
- 宇航员领导的综合测序和地化学分析对于天体生物学探索是有效的.
- 岩管是各种微生物群落的庇护所,并保存有机物质,为生物签名潜力提供了洞察力.
- 这些发现对未来在火星和其他行星上的生命探测任务有直接影响.
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