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首页> 外文期刊>Environmental Science & Technology >Independence of Nitrate and Nitrite Inhibition of Desulfovibrio vulgaris Hildenborough and Use of Nitrite as a Substrate for Growth
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Independence of Nitrate and Nitrite Inhibition of Desulfovibrio vulgaris Hildenborough and Use of Nitrite as a Substrate for Growth

机译：寻常脱硫弧菌Hildenborough的硝酸盐和亚硝酸盐抑制作用的独立性以及亚硝酸盐作为生长基质的用途

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摘要

Sulfate-reducing microbes, such as Desulfovibrio vulgaris Hildenborough, cause "souring" of petroleum reservoirs through produced sulfide and precipitate heavy metals, either as sulfides or by alteration of the metal reduction state. Thus, inhibitors of these microbes, including nitrate and nitrite ions, are studied in order to limit their impact. Nitrite is a potent inhibitor of sulfate reducers, and it has been suggested that nitrate does not inhibit these microbes directly but by reduction to nitrite, which serves as the ultimate inhibitor. Here we provide evidence that nitrate inhibition of D. vulgaris can be independent of nitrite production. We also show that D. vulgaris can use nitrite as a nitrogen source or terminal electron acceptor for growth. Moreover, we report that use of nitrite as a terminal electron acceptor requires nitrite reductase (nrfA) as a D. vulgaris nrfA mutant cannot respire nitrite but remains capable of utilizing nitrite as a nitrogen source. These results illuminate previously uncharacterized metabolic abilities of D. vulgaris that may allow niche expansion in low-sulfate environments. Understanding these abilities may lead to better control of sulfate-reducing bacteria in industrial settings and more accurate prediction of their interactions in the environment.
机译：降低硫酸盐含量的微生物，例如Desulfovibrio vulgaris Hildenborough，通过产生的硫化物使石油储层“变质”，并沉淀出重金属，无论是硫化物还是金属还原态的改变。因此，研究了这些微生物的抑制剂，包括硝酸根离子和亚硝酸根离子，以限制其影响。亚硝酸盐是硫酸盐还原剂的有效抑制剂，并且已经表明硝酸盐不是直接抑制这些微生物，而是通过还原为最终抑制剂亚硝酸盐。在这里，我们提供了证据，表明对寻常小球藻的硝酸盐抑制作用可能与亚硝酸盐的产生无关。我们还表明，寻常D.可以使用亚硝酸盐作为氮源或终端电子受体的增长。此外，我们报告说，使用亚硝酸盐作为末端电子受体需要将亚硝酸盐还原酶（nrfA）用作普通D. vrgaris nrfA突变体不能释放亚硝酸盐，但仍然能够利用亚硝酸盐作为氮源。这些结果阐明了以前未曾描述过的D. vulgaris的代谢能力，这可能会使低硫酸盐环境中的生态位扩展。了解这些能力可以在工业环境中更好地控制硫酸盐还原细菌，并更准确地预测它们在环境中的相互作用。

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  • 来源
    《Environmental Science & Technology》 |2015年第2期|924-931|共8页
  • 作者

    Hannah L. Korte; Avneesh Saini; Valentine V. Trotter; Gareth P. Butland; Adam P. Arkin; Judy D. Wall;

  • 作者单位

    Department of Biochemistry, University of Missouri, Columbia, Missouri 65211, United States,Ecosystems and Networks Integrated with Genes and Molecular Assemblies, Berkeley, California 94720, United States;

    Ecosystems and Networks Integrated with Genes and Molecular Assemblies, Berkeley, California 94720, United States,Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States;

    Ecosystems and Networks Integrated with Genes and Molecular Assemblies, Berkeley, California 94720, United States,Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States;

    Ecosystems and Networks Integrated with Genes and Molecular Assemblies, Berkeley, California 94720, United States,Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States;

    Ecosystems and Networks Integrated with Genes and Molecular Assemblies, Berkeley, California 94720, United States,Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States;

    Department of Biochemistry, University of Missouri, Columbia, Missouri 65211, United States,Ecosystems and Networks Integrated with Genes and Molecular Assemblies, Berkeley, California 94720, United States;

  • 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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