酸盐对能够生物化的细菌和火星的影响
Swati Dubey1,2, Shubhanshu Shukla3,4, Nitin Gupta5
1Centre for Earth Sciences, Indian Institute of Science, Bangalore, Karnataka, India.
PloS one
|January 29, 2026
概括
火星 regolith 中的甲酸盐会影响微生物生命和生物凝固. 这项研究发现,甲酸盐会诱导一种
科学领域:
- 天体生物学和地质微生物学
- 材料科学与工程 材料科学与工程
背景情况:
- 在火星岩石中发现甲酸盐,需要了解它对潜在的地球生命的影响.
- 微生物诱导的石沉 (MICP) 是一种已知的生物巩固火星 regolith的方法.
- 酸盐对MICP有能力的微生物和火星的作用尚不清楚.
研究的目的:
- 为了研究甲酸盐对能够生物化的细菌和火星的影响.
- 为了评估酸盐对微生物诱导的石沉 (MICP) 在火星规律模拟剂的影响.
主要方法:
- 查尿酶活性细菌使用醇红色试验.
- 沉物通过扫描电子显微镜 (SEM) 和X射线衍射 (XRD) 进行表征.
- 评估酸盐对细菌生长的影响 (格拉姆染色,SEM,板测定,生长曲线,活死染色) 和火星的压力强度.
主要成果:
- 发现了一种能够进行生物凝固的新型细菌,SI_IISc_isolate (与Sporosarcina pasteurii相关).
- 酸盐压力对细菌生长产生了负面影响,但诱导了细胞外基质释放和"多细胞性行为".
- 酸盐在与瓜尔相结合时显著提高了火星的压力强度,尽管总体依赖于石质添加剂.
结论:
- 甲酸盐会影响微生物的行为以及生物水泥化火星 regolith 的特性.
- 鉴定的细菌和观察到的"多细胞性行为"为微生物在富含甲酸盐的环境中的适应提供了洞察力.
- 甲酸盐可能会增强火星建筑的生物水泥化,这取决于其他 regolith 组件.
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