气候变化领域集成服务门户(CCPortal): Geochemical transition zone powering microbial growth in subsurface sediments

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DOI	10.1073/pnas.2005917117
	Geochemical transition zone powering microbial growth in subsurface sediments
	Zhao R.; Mogollon J.M.; Abby S.S.; Schleper C.; Biddle J.F.; Roerdink D.L.; Thorseth I.H.; Jorgensen S.L.
发表日期	2020
ISSN	0027-8424
起始页码	32617
结束页码	32626
卷号	117 期号:51
英文摘要	No other environment hosts as many microbial cells as the marine sedimentary biosphere. While the majority of these cells are expected to be alive, they are speculated to be persisting in a state of maintenance without net growth due to extreme starvation. Here, we report evidence for in situ growth of anaerobic ammoniumoxidizing (anammox) bacteria in ∼80,000-y-old subsurface sediments from the Arctic Mid-Ocean Ridge. The growth is confined to the nitrate-ammonium transition zone (NATZ), a widespread geochemical transition zone where most of the upward ammonium flux from deep anoxic sediments is being consumed. In this zone the anammox bacteria abundances, assessed by quantification of marker genes, consistently displayed a four order of magnitude increase relative to adjacent layers in four cores. This subsurface cell increase coincides with a markedly higher power supply driven mainly by intensified anammox reaction rates, thereby providing a quantitative link between microbial proliferation and energy availability. The reconstructed draft genome of the dominant anammox bacterium showed an index of replication (iRep) of 1.32, suggesting that 32% of this population was actively replicating. The genome belongs to a Scalindua species which we name Candidatus Scalindua sediminis, so far exclusively found in marine sediments. It has the capacity to utilize urea and cyanate and a mixotrophic lifestyle. Our results demonstrate that specific microbial groups are not only able to survive unfavorable conditions over geological timescales, but can proliferate in situ when encountering ideal conditions with significant consequences for biogeochemical nitrogen cycling. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Anammox; Deep biosphere; Energy availability; Microbial in situ growth; Nitrogen cycle
语种	英语
scopus关键词	ammonia; cyanic acid; urea; anammox bacterium; Article; bacterial genome; bacterial growth; Candidatus Scalindua sediminis; cell surface; chemical reaction; genome analysis; geochemical analysis; marine environment; marker gene; mixotrophy; nonhuman; phase transition; population abundance; priority journal; Scalindua; sediment; survival rate
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/160187
作者单位	Zhao, R., K.G. Jebsen Centre for Deep Sea Research, University of Bergen, Bergen, 5007, Norway, School of Marine Science and Policy, University of Delaware, Lewes, DE 19958, United States; Mogollon, J.M., Institute of Environmental Sciences (CML), Leiden University, Leiden, 2333 CC, Netherlands; Abby, S.S., Division of Archaea Biology and Ecogenomics, Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, A-1090, Austria; Schleper, C., Division of Archaea Biology and Ecogenomics, Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, A-1090, Austria; Biddle, J.F., School of Marine Science and Policy, University of Delaware, Lewes, DE 19958, United States; Roerdink, D.L., K.G. Jebsen Centre for Deep Sea Research, University of Bergen, Bergen, 5007, Norway; Thorseth, I.H., K.G. Jebsen Centre for Deep Sea Research, University of Bergen, Bergen, 5007, Norway; Jorgensen, S.L., K.G. Jebsen Centre for Deep Sea Research, University of Bergen, Bergen, 5007, Norway
推荐引用方式 GB/T 7714	Zhao R.,Mogollon J.M.,Abby S.S.,et al. Geochemical transition zone powering microbial growth in subsurface sediments[J],2020,117(51).
APA	Zhao R..,Mogollon J.M..,Abby S.S..,Schleper C..,Biddle J.F..,...&Jorgensen S.L..(2020).Geochemical transition zone powering microbial growth in subsurface sediments.Proceedings of the National Academy of Sciences of the United States of America,117(51).
MLA	Zhao R.,et al."Geochemical transition zone powering microbial growth in subsurface sediments".Proceedings of the National Academy of Sciences of the United States of America 117.51(2020).