气候变化领域集成服务门户(CCPortal): Microbial chemolithotrophy mediates oxidative weathering of granitic bedrock

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DOI	10.1073/pnas.1909970117
	Microbial chemolithotrophy mediates oxidative weathering of granitic bedrock
	Napieralski S.A.; Buss H.L.; Brantley S.L.; Lee S.; Xu H.; Roden E.E.
发表日期	2019
ISSN	0027-8424
起始页码	26394
结束页码	26401
卷号	116 期号:52
英文摘要	The flux of solutes from the chemical weathering of the continental crust supplies a steady supply of essential nutrients necessary for the maintenance of Earth's biosphere. Promotion of weathering by microorganisms is a well-documented phenomenon and is most often attributed to heterotrophic microbial metabolism for the purposes of nutrient acquisition. Here, we demonstrate the role of chemolithotrophic ferrous iron [Fe(II)]-oxidizing bacteria in biogeochemical weathering of subsurface Fe(II)-silicateminerals at the Luquillo Critical Zone Observatory in Puerto Rico. Under chemolithotrophic growth conditions, mineral-derived Fe(II) in the Rio Blanco Quartz Diorite served as the primary energy source for microbial growth. An enrichment in homologs to gene clusters involved in extracellular electron transfer was associated with dramatically accelerated rates of mineral oxidation and adenosine triphosphate generation relative to sterile diorite suspensions. Transmission electron microscopy and energy-dispersive spectroscopy revealed the accumulation of nanoparticulate Fe-oxyhydroxides on mineral surfaces only under biotic conditions. Microbially oxidized quartz diorite showed greater susceptibility to proton-promoted dissolution, which has important implications for weathering reactions in situ. Collectively, our results suggest that chemolithotrophic Fe(II)-oxidizing bacteria are likely contributors in the transformation of rock to regolith. © 2019 National Academy of Sciences. All rights reserved.
英文关键词	Chemolithotrophy; Critical zone; Weathering
语种	英语
scopus关键词	adenosine triphosphate; ferric hydroxide; ferrous ion; silicate; silicon dioxide; Article; chemolithotrophy; controlled study; diorite; electron transport; energy dispersive X ray spectroscopy; ferrous iron oxidizing bacteria; field emission scanning electron microscopy; gene cluster; inductively coupled plasma mass spectrometry; microbial growth; mineral oxidation; nonhuman; organisms by metabolism; oxidation; priority journal; Puerto Rico; rock; suspension; transmission electron microscopy; weathering
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159031
作者单位	Napieralski, S.A., Department of Geoscience, NASA Astrobiology Institute, University of Wisconsin-Madison, Madison, WI 53706, United States; Buss, H.L., School of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, United Kingdom; Brantley, S.L., Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA 16802, United States, Department of Geosciences, Pennsylvania State University, University Park, PA 16802, United States; Lee, S., Department of Geoscience, NASA Astrobiology Institute, University of Wisconsin-Madison, Madison, WI 53706, United States; Xu, H., Department of Geoscience, NASA Astrobiology Institute, University of Wisconsin-Madison, Madison, WI 53706, United States; Roden, E.E., Department of Geoscience, NASA Astrobiology Institute, University of Wisconsin-Madison, Madison, WI 53706, United States
推荐引用方式 GB/T 7714	Napieralski S.A.,Buss H.L.,Brantley S.L.,et al. Microbial chemolithotrophy mediates oxidative weathering of granitic bedrock[J],2019,116(52).
APA	Napieralski S.A.,Buss H.L.,Brantley S.L.,Lee S.,Xu H.,&Roden E.E..(2019).Microbial chemolithotrophy mediates oxidative weathering of granitic bedrock.Proceedings of the National Academy of Sciences of the United States of America,116(52).
MLA	Napieralski S.A.,et al."Microbial chemolithotrophy mediates oxidative weathering of granitic bedrock".Proceedings of the National Academy of Sciences of the United States of America 116.52(2019).