Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NGEO2978 |
Microbial substrate preference dictated by energy demand rather than supply | |
Amenabar, Maximiliano J.1; Shock, Everett L.2,3,4; Roden, Eric E.4,5; Peters, John W.6; Boyd, Eric S.1,4 | |
2017-08-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Growth substrates that maximize energy yield are widely thought to be utilized preferentially by microorganisms. However, observed distributions of microorganisms and their activities often deviate from predictions based solely on thermodynamic considerations of substrate energy supply. Here we present observations of the bioenergetics and growth yields of a metabolically flexible, thermophilic strain of the archaeon Acidianus when grown autotrophically on minimal medium with hydrogen (H-2) or elemental sulfur (S degrees) as an electron donor, and S degrees or ferric iron (Fe3+) as an electron acceptor. Thermodynamic calculations indicate that S degrees/Fe3+ and H-2/Fe3+ yield three-and fourfold more energy per mole of electrons transferred, respectively, than the H-2/S degrees couple. However, biomass yields in Acidianus cultures provided with H-2/S degrees were eightfold greater than when provided S degrees/Fe3+ or H-2/Fe3+, indicating that the H-2/S degrees redox couple is preferred. Indeed, cells provided with all three growth substrates (H-2, Fe3+ and S degrees) grew preferentially by reduction of S degrees with H-2. We conclude that substrate preference is dictated by differences in the energy demand of electron transfer reactions in Acidianus when grown with different substrates, rather than substrate energy supply. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406641100012 |
WOS关键词 | YELLOWSTONE-NATIONAL-PARK ; HYPERTHERMOPHILIC ARCHAEA ; BIOGEOCHEMICAL CYCLES ; ACIDIANUS-AMBIVALENS ; ELECTRON-TRANSFER ; REDUCTION ; SULFUR ; CYTOCHROME ; SEDIMENTS ; BACTERIA |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35005 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Montana State Univ, Dept Microbiol & Immunol, Bozeman, MT 59717 USA; 2.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85281 USA; 3.Arizona State Univ, Sch Mol Sci, Tempe, AZ 85281 USA; 4.NASA, Astrobiol Inst, Mountain View, CA 94035 USA; 5.Univ Wisconsin, Dept Geosci, Madison, WI 53706 USA; 6.Washington State Univ, Inst Biol Chem, Pullman, WA 99164 USA |
推荐引用方式 GB/T 7714 | Amenabar, Maximiliano J.,Shock, Everett L.,Roden, Eric E.,et al. Microbial substrate preference dictated by energy demand rather than supply[J]. NATURE GEOSCIENCE,2017,10(8). |
APA | Amenabar, Maximiliano J.,Shock, Everett L.,Roden, Eric E.,Peters, John W.,&Boyd, Eric S..(2017).Microbial substrate preference dictated by energy demand rather than supply.NATURE GEOSCIENCE,10(8). |
MLA | Amenabar, Maximiliano J.,et al."Microbial substrate preference dictated by energy demand rather than supply".NATURE GEOSCIENCE 10.8(2017). |
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