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Nitrifying-genes dynamics in the enriched bacterial consortium inoculated with humic soil
- Nitrifying-genes dynamics in the enriched bacterial consortium inoculated with humic soil
- Seo Y.-J.; Lee Y.-Y.; Choi H.-J.; Cho K.-S.
- Ewha Authors
- SCOPUS Author ID
- Issue Date
- Journal Title
- Korean Journal of Microbiology and Biotechnology
- Korean Journal of Microbiology and Biotechnology vol. 47, no. 2, pp. 296 - 302
- Ammonium; Ammonium-oxidizing archaea; Ammonium-oxidizing bacteria; Functional gene; Nitrification; Nitrite
- Korean Society for Microbiolog and Biotechnology
- Document Type
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- 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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