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首页> 外文期刊>Environmental Science & Technology >Sulfur Isotopic Fractionation of Carbonyl Sulfide during Degradation by Soil Bacteria
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Sulfur Isotopic Fractionation of Carbonyl Sulfide during Degradation by Soil Bacteria

机译：土壤细菌降解过程中羰基硫的硫同位素分馏

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摘要

We performed laboratory incubation experiments ( on the degradation of gaseous phase carbonyl sulfide (OCS) by soil bacteria to determine its sulfur isotopic fractionation constants (~(34)ε). Incubation experiments were conducted using strains belonging to the genera Mycobacterium, Williamsia, and Cupriavidus isolated from natural soil environments. The ~(34)ε values determined were -3.67 ± 0.33‰, -3.99 ± 0.19‰, -3.57 ± 0.22‰, and -3.56 ± 0.23‰ for Mycobacterium spp. strains THI401, THI402, THI404, and THI405; -3.74 ± 0.29‰ for Williamsia sp. strain THI410; and -2.09 ± 0.07‰ and -2.38 ± 0.35‰ for Cupriavidus spp. strains THI414 and THI415. Although OCS degradation rates divided by cell numbers (cell-specific activity) were different among strains of the same genus, the ~(34)ε values for same genus showed no significant differences. Even though the numbers of bacterial species examined were limited, our results suggest that ~(34)ε values for OCS bacterial degradation depend not on cell-specific activities, but on genus-level biological differences, suggesting that ~(34)ε values are dependent on enzymatic and/or membrane properties. Taking our ~(34)ε values as representative for bacterial OCS degradation, the expected atmospheric changes in δ~(34)S values of OCS range from 0.5‰ to 0.9‰, based on previously reported decreases in OCS concentrations at Mt. Fuji, Japan. Consequently, tropospheric observation of δ~(34)S values for OCS coupled with ~(34)ε values for OCS bacterial degradation can potentially be used to investigate soil as an OCS sink.
机译：我们进行了实验室培养实验（通过土壤细菌降解气相羰基硫（OCS）以确定其硫同位素分馏常数（〜（34）ε）。使用属于分枝杆菌属，Williamsia和从天然土壤环境中分离出来的铜杯菌，分枝杆菌菌株THI401，THI402，THI404的〜（34）ε值分别为-3.67±0.33‰，-3.99±0.19‰，-3.57±0.22‰和-3.56±0.23‰。 ；和THI405； Williamsia sp。THI410菌株为-3.74±0.29‰； Cupriavidus spp。THI414和THI415菌株为-2.09±0.07‰和-2.38±0.35‰。尽管OCS降解率除以细胞数（细胞比活性） ）在同一属中的菌株之间是不同的，同一属的〜（34）ε值没有显着差异。尽管所检查的细菌种类数量有限，我们的结果表明OCS细菌降解的〜（34）ε值不依赖于细胞特定活性，但取决于属水平的生物学差异，表明〜（34）ε值取决于酶和/或膜的性质。以我们的〜（34）ε值作为细菌OCS降解的代表，基于先前报道的Mt的OCS浓度降低，OCS的δ〜（34）S值的预期大气变化范围为0.5‰至0.9‰。日本富士。因此，对流层观测的OCSδ〜（34）S值与OCS细菌降解的〜（34）ε值可以潜在地用于调查土壤作为OCS汇。

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  • 来源
    《Environmental Science & Technology》 |2016年第7期|3537-3544|共8页
  • 作者

    Kazuki Kamezaki; Shohei Hattori; Takahiro Ogawa; Sakae Toyoda; Hiromi Kato; Yoko Katayama; Naohiro Yoshida;

  • 作者单位

    Department of Environmental Chemistry and Engineering Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan;

    Department of Environmental Chemistry and Engineering Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan;

    Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan;

    Department of Environmental Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan;

    Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-Ku, Sendai 980-8577, Japan;

    Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan;

    Department of Environmental Chemistry and Engineering Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan,Earth-Life Science Institute, Tokyo Institute of Technology, 2-12-1-IE-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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