globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1909970117
论文题名:
Microbial chemolithotrophy mediates oxidative weathering of granitic bedrock
作者: Napieralski S.A.; Buss H.L.; Brantley S.L.; Lee S.; Xu H.; Roden E.E.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2019
卷: 116, 期:52
起始页码: 26394
结束页码: 26401
语种: 英语
英文关键词: Chemolithotrophy ; Critical zone ; Weathering
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
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.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162271
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


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

Recommended Citation:
Napieralski S.A.,Buss H.L.,Brantley S.L.,et al. Microbial chemolithotrophy mediates oxidative weathering of granitic bedrock[J]. Proceedings of the National Academy of Sciences of the United States of America,2019-01-01,116(52)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Napieralski S.A.]'s Articles
[Buss H.L.]'s Articles
[Brantley S.L.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Napieralski S.A.]'s Articles
[Buss H.L.]'s Articles
[Brantley S.L.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Napieralski S.A.]‘s Articles
[Buss H.L.]‘s Articles
[Brantley S.L.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.