Nitrifying-genes dynamics in the enriched bacterial consortium inoculated with humic soil
- 주제(키워드) Ammonium , Ammonium-oxidizing archaea , Ammonium-oxidizing bacteria , Functional gene , Nitrification , Nitrite
- 등재 SCOPUS
- 발행기관 Korean Society for Microbiolog and Biotechnology
- 발행년도 2019
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000172150
- 본문언어 한국어
- Published As https://dx.doi.org/10.4014/mbl.1809.09014
초록/요약
In this study, the effects of ammonium concentration (117.5-1155.0 mg-N·1-1), nitrite concentration (0-50.0 mg-N·1-1), and temperature (15-35°C) on nitrification performance and its functional genes (amoA-arc, amoA-bac, hao) in an enriched consortium inoculated with humic acid were determined. Notably, the maximum nitrification rate value was observed at 315 mg-N·1-1 of ammonium, but the highest functional gene copy numbers were obtained at 630 mg-N·1-1 of ammonium. No inhibition of the nitrification rate and functional gene copy numbers was observed via the added nitrites. The optimum temperature for maximum nitrification performance was observed to be 30°C. The amoA-bac copy numbers were also greater than those of amoA-arc under all test conditions. Notably, amoA-arc copy numbers and nitrification efficiency showed a positive relationship in network analysis. These results indicate that ammonium-oxidizing archaea and bacteria play important roles in the nitrification process. © 2019, The Korean Society for Microbiology and Biotechnology.
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