Haloalkaliphilic denitrifiers-dependent sulfate-reducing bacteria thrive in nitrate-enriched environments
文献类型：期刊论文
| 作者 | Zhou, Jiemin; Xing, Jianmin |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2021-08-01 |
| 卷号 | 201页码:- |
| 关键词 | Sulfate-reducing bacteria Denitrifying bacteria Metatranscriptomic analysis Nitrate inhibition Enriched biomass |
| ISSN号 | 0043-1354 |
| 英文摘要 | As bridge in global cycles of carbon, nitrogen, and sulfur, sulfate-reducing bacteria (SRB) play more and more important role under various environments, especially the saline-alkali environments with significant increase in area caused by human activities. Sulfate reduction can be inhibited by environmental nitrate. However, how SRB cope with environmental nitrate stress in these extreme environments still remain unclear. Here, after a longterm enrichment of sediment from saline-alkali Qinghai Lake of China using anaerobic filter reactors, nitrate was added to evaluate the response of SRB. With the increase in nitrate concentrations, the inhibition on sulfate reduction was gradually observed. Interestingly, extension of hydraulic retention time can relieve the inhibition caused by high nitrate concentration. Mass balance analysis showed that nitrate reduction is prior to sulfate reduction. Further metatranscriptomic analysis shows that, genes of nitrite reductase (periplasmic cytochrome c nitrite reductase gene) and energy metabolisms (lactate dehydrogenase, formate dehydrogenase, pyruvate: ferredoxin-oxidoreductase, and fumarate reductase genes) in SRB was down-regulated, challenging the longheld opinion that up-regulation of these genes can relieve the nitrate inhibition. Most importantly, the nitrate addition activated the denitrification pathway in denitrifying bacteria (DB) via significantly up-regulating the expression of the corresponding genes (nitrite reductase, nitric oxide reductase c subunit, nitric oxide reductase activation protein and nitrous oxide reductase genes), quickly reducing the environmental nitrate and relieving the nitrate inhibition on SRB. Our findings unravel that in response to environmental nitrate stress, haloalkaliphilic SRB show dependency on DB, and expand our knowledge of microbial relationship during sulfur and nitrogen cycles. |
| WOS研究方向 | Engineering, Environmental ; Environmental Sciences ; Water Resources |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46217]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Jiemin,Xing, Jianmin. Haloalkaliphilic denitrifiers-dependent sulfate-reducing bacteria thrive in nitrate-enriched environments[J]. WATER RESEARCH,2021,201:-. |
| APA | Zhou, Jiemin,&Xing, Jianmin.(2021).Haloalkaliphilic denitrifiers-dependent sulfate-reducing bacteria thrive in nitrate-enriched environments.WATER RESEARCH,201,-. |
| MLA | Zhou, Jiemin,et al."Haloalkaliphilic denitrifiers-dependent sulfate-reducing bacteria thrive in nitrate-enriched environments".WATER RESEARCH 201(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。