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| DOI | 10.1073/pnas.1805000115 |
| A bet-hedging strategy for denitrifying bacteria curtails their release of N2O | |
| Lycus P.; Soriano-Laguna M.J.; Kjos M.; Richardson D.J.; Gates A.J.; Milligan D.A.; Frostegård Å.; Bergaust L.; Bakken L.R. | |
| 发表日期 | 2018 |
| ISSN | 0027-8424 |
| 起始页码 | 11820 |
| 结束页码 | 11825 |
| 卷号 | 115期号:46 |
| 英文摘要 | When oxygen becomes limiting, denitrifying bacteria must prepare for anaerobic respiration by synthesizing the reductases NAR (NO3− → NO2−), NIR (NO2− → NO), NOR (2NO → N2O), and NOS (N2O → N2), either en bloc or sequentially, to avoid entrapment in anoxia without energy. Minimizing the metabolic burden of this precaution is a plausible fitness trait, and we show that the model denitrifier Paracoccus denitrificans achieves this by synthesizing NOS in all cells, while only a minority synthesize NIR. Phenotypic diversification with regards to NIR is ascribed to stochastic initiation of gene transcription, which becomes autocatalytic via NO production. Observed gas kinetics suggest that such bet hedging is widespread among denitrifying bacteria. Moreover, in response to oxygenation, P. denitrificans preserves NIR in the poles of nongrowing persister cells, ready to switch to anaerobic respiration in response to sudden anoxia. Our findings add dimensions to the regulatory biology of denitrification and identify regulatory traits that decrease N2O emissions. © 2018 National Academy of Sciences. All rights reserved. |
| 英文关键词 | Bet hedging; Denitrification; Ecophysiology; Nitrous oxide |
| 语种 | 英语 |
| scopus关键词 | nitrous oxide; nitric acid derivative; nitrous oxide; oxidoreductase; oxygen; Article; bacterial cell; bacterial growth; bacterial phenomena and functions; bacterial strain; bet hedging; catalysis; cell respiration; controlled study; denitrification; denitrifying bacterium; genetic transcription; growth rate; nonhuman; oxygenation; Paracoccus denitrificans; phenotype; priority journal; synthesis; wild type; bacterium; hypoxia; metabolism; physiology; Bacteria; Denitrification; Hypoxia; Nitrates; Nitrous Oxide; Oxidoreductases; Oxygen; Paracoccus denitrificans |
| 来源期刊 | Proceedings of the National Academy of Sciences of the United States of America
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/160447 |
| 作者单位 | Lycus, P., Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, 1430, Norway; Soriano-Laguna, M.J., School of Biological Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom; Kjos, M., Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, 1430, Norway; Richardson, D.J., School of Biological Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom; Gates, A.J., School of Biological Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom; Milligan, D.A., Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, 1430, Norway; Frostegård, Å., Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, 1430, Norway; Bergaust, L., Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, 1430, Norway; Bakken, L.R., Department of Chemistry, Biotechnology a... |
| 推荐引用方式 GB/T 7714 | Lycus P.,Soriano-Laguna M.J.,Kjos M.,et al. A bet-hedging strategy for denitrifying bacteria curtails their release of N2O[J],2018,115(46). |
| APA | Lycus P..,Soriano-Laguna M.J..,Kjos M..,Richardson D.J..,Gates A.J..,...&Bakken L.R..(2018).A bet-hedging strategy for denitrifying bacteria curtails their release of N2O.Proceedings of the National Academy of Sciences of the United States of America,115(46). |
| MLA | Lycus P.,et al."A bet-hedging strategy for denitrifying bacteria curtails their release of N2O".Proceedings of the National Academy of Sciences of the United States of America 115.46(2018). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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