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在河口湿地微生物群中评估与黑暗CO2固定有关的环境梯度

Luise Grüterich¹, Jason Nicholas Woodhouse^1,2, Peter Mueller³

¹Department of Microbiology and Biotechnology, University of Hamburg, Hamburg, Germany.

Applied and environmental microbiology

|January 2, 2025

概括

在湿地中微生物的深色二氧化碳固定利用了四个关键路径,受酸盐和氧气水平等环境因素的影响. 这项研究强调了微生物.

科学领域:

环境微生物学环境微生物学
生物地质化学生物地质化学
分子生态学分子生态学

背景情况:

大气中二氧化碳度的上升推动了全球变暖,需要采取减缓气候变化战略.
土壤微生物通过CO2固定在碳封存中发挥作用,这是河口湿地经常被忽视的过程.

研究的目的:

在河口湿地研究微生物CO2固定通路的*in situ*基因和转录丰度.
确定控制不同CO2固定通路活动的环境因素.
评估微生物暗CO2固定在减缓气候变化的潜力.

主要方法:

多omics方法:元编码,深度元基因组学和元转录组学.
对沿环境梯度的基因和转录丰度的分析.
固定CO2的微生物的分类学分配.

主要成果:

湿地微生物群拥有四个主要的CO2固定通路:卡尔文循环,逆三碳酸循环,伍德-Ljungdahl通路和逆甘氨酸通路.
这些途径的转录因环境条件而异:反向三酸循环基因与高酸盐相关,伍德-Ljungdahl与低氧相关,卡尔文循环与高有机物相关.
关键的细菌系如*Desulfobacterota*和*Methylomirabilota*都在显著地参与到黑暗的CO2固定中.

结论:

微生物的深色CO2固定在河口湿地中活跃,并受到特定环境梯度的影响.
了解这些微生物过程可以为增强自然碳汇的策略提供信息.
这项研究促进了对微生物对全球碳循环的贡献的理解.

关键词:

在C循环中,埃尔贝河口的河口.伍德 - 隆格达尔路径二氧化碳的固定方式转基因组学是指转基因组学.转换组学转换组学转换组学反向TCA周期的反向TCA周期

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