微生物驱动的元素循环使微生物能够适应深海铁结节沉积物场
Dechao Zhang1,2,3, Xudong Li4,5, Yuehong Wu6
1Qingdao Key Laboratory of Marine Biodiversity and Conservation, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China.
Microbiome
|July 25, 2023
概括
深海铁结块沉积物中的微生物通过氧化还原反应利用无机营养素生存. 这些社区表现出多样化的金属抵抗和转化途径,适应营养贫乏,金属丰富的深环境.
科学领域:
- 深海微生物学 深海微生物学
- 转基因组学是指转基因组学.
- 生物地质化学生物地质化学
背景情况:
- 铁结块创造了独特的深息地,金属含量高,营养含量低.
- 在这些环境中的微生物生活面临着由于极端条件的生存挑战.
- 了解这些沉积物中的微生物功能能力是有限的.
研究的目的:
- 在铁结结相关沉积物中对微生物群落进行全面的元基因组学分析.
- 研究微生物在这些富含金属的环境中的功能适应和代谢策略.
- 了解微生物在深生态系统中的元素循环中的作用.
主要方法:
- 从克拉里安-克利珀顿断裂区的七个沉积物样本进行了基因组学分析.
- 重建和分析了179个高质量的元基因组组装基因组 (MAG).
- 识别对金属耐药性,营养获取和能量代谢的微生物途径.
主要成果:
- 重建了179个MAG,揭示了各种细菌和考古学科的细菌和考古学科,具有有限的物种级别分类.
- 确定了各种重金属抵抗机制,包括氧化,还原和流出.
- 微生物的能量获取主要依赖于金属和硫化合物的氧化,而化学石化和自性是显著的.
结论:
- 甲基因组分析显示,深海微生物中的金属抵抗和转化途径具有广泛的功能冗余.
- 铁结块沉积物中的微生物表现出不同的营养策略,主要是通过氧化还原反应利用无机营养素.
- 这些发现凸显了微生物群落在这些独特的金属丰富息地内的深元素循环中发挥的关键作用.
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