Deeply-sourced formate fuels sulfate reducers but not methanogens at Lost City hydrothermal field.
Deeply-sourced formate fuels sulfate reducers but not methanogens at Lost City hydrothermal field.
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DOI：
10.1038/s41598-017-19002-5
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发表时间：
2018-01-15
影响因子：
4.6
通讯作者：
McGonigle JM
中科院分区：
文献类型：
--
作者：
Lang SQ;Früh-Green GL;Bernasconi SM;Brazelton WJ;Schrenk MO;McGonigle JM
水岩蛇纹化反应产生的氢可以驱动有机化合物的生物和非生物合成。我们研究了高能量但低多样性的蛇纹岩型迷城热液区的非生物碳生产和微生物代谢途径。化合物特定的14 C数据表明，甲酸盐是地幔衍生和非生物在某些位置，并有一个额外的，海水衍生的组件在其他地方。古细菌群落的主要成员迷城甲烷菌目产生的脂质在很大程度上缺乏14 C，但宏基因组学证据表明它们不能利用甲酸盐进行甲烷生成。相反，硫酸盐还原菌可能是迷城烟囱中甲酸盐的主要消费者。奇怪的是，在数量上占主导地位的烟囱微生物群落的古细菌类型似乎不适合生活在纯热液流体中，而没有能够释放CO2的生物体的共存。考虑到在这样的系统中缺乏溶解的无机碳，利用甲酸盐的能力可能是在原始蛇纹岩环境中生存的关键特征。
Hydrogen produced during water-rock serpentinization reactions can drive the synthesis of organic compounds both biotically and abiotically. We investigated abiotic carbon production and microbial metabolic pathways at the high energy but low diversity serpentinite-hosted Lost City hydrothermal field. Compound-specific 14C data demonstrates that formate is mantle-derived and abiotic in some locations and has an additional, seawater-derived component in others. Lipids produced by the dominant member of the archaeal community, the Lost City Methanosarcinales, largely lack 14C, but metagenomic evidence suggests they cannot use formate for methanogenesis. Instead, sulfate-reducing bacteria may be the primary consumers of formate in Lost City chimneys. Paradoxically, the archaeal phylotype that numerically dominates the chimney microbial communities appears ill suited to live in pure hydrothermal fluids without the co-occurrence of organisms that can liberate CO2. Considering the lack of dissolved inorganic carbon in such systems, the ability to utilize formate may be a key trait for survival in pristine serpentinite-hosted environments.
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影响因子：
3.4
作者：
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通讯作者：
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影响因子：
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影响因子：
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作者：
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通讯作者：
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作者：
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