Dynamic interplay between microbial denitrification and antibiotic resistance under enhanced anoxic denitrification condition in soil
文献类型： 外文期刊
作者： Sun, Mingming 1 ; Ye, Mao 2 ; Liu, Kuan 1 ; Schwab, Arthur P.; Liu, Manqiang 1 ; Jiao, Jiaguo 1 ; Feng, Yanfang; Wa 1 ;
作者机构： 1.Nanjing Agr Univ, Soil Ecol Lab, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China
2.Chinese Acad Sci, Key Lab Soil Environm & Pollut Remediat, Inst Soil Sci, Nanjing 210008, Peoples R China
3.Chinese Acad Sci, Key Lab Soil Env
关键词： Antibiotic-resistant genes;Denitrifying genes;Enhanced anoxic denitrification;Mutual dynamic interplay;Denitrifiers
期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）
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收录情况： SCI
摘要： Mixed contamination of nitrate and antibiotics/antibiotic-resistant genes (ARGs) is an emerging environmental risk to farmland soil. This is the first study to explore the role of excessive anthropogenic nitrate input in the anoxic dissipation of soil antibiotic/ARGs. During the initial 10 days of incubation, the presence of soil antibiotics significantly inhibited NO3- dissipation, N2O production rate, and denitrifying genes (DNGs) abundance in soil (p < 0.05). Between days 10 and 30, by contrast, enhanced denitrification clearly prompted the decline in antibiotic contents and ARG abundance. Significantly negative correlations were detected between DNGs and ARGs, suggesting that the higher the DNG activity, the more dramatic is the denitrification and the greater are the antibiotic dissipation and ARG abundance. This study provides crucial knowledge for understanding the mutual interaction between soil DNGs and ARGs in the enhanced anoxic denitrification condition. (C) 2016 Elsevier Ltd. All rights reserved.
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