Coexistence and association between heavy metals, tetracycline and corresponding resistance genes in vermicomposts originating from different substrates
文献类型： 外文期刊
作者： Liu, Kuan 1 ; Sun, Mingming 1 ; Ye, Mao 2 ; Chao, Huizhen 1 ; Zhao, Yuanchao 1 ; Xia, Bing 3 ; Jiao, Wentao 4 ; Feng, Yan 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Resources & Environm Sci, Soil Ecol Lab, Nanjing 210095, Jiangsu, Peoples R China
2.Chinese Acad Sci, Key Lab Soil Environm & Pollut Remediat, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China
3.Anhui Acad Environm Sci Res, Hefei 230022, Anhui, Peoples R China
4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 00085, Peoples R China
5.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Jiangsu, Peoples R China
关键词： Vermicompost; Heavy metal resistance gene; Tetracycline; Antibiotic resistance gene; Positive correlation
期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）
ISSN： 0269-7491
年卷期： 2019 年 244 卷
页码：
收录情况： SCI
摘要： Coexistence of antibiotics/heavy metals and the overexpression of resistance genes in the vermicompost has become an emerging environmental issue. Little is known about the interaction and correlation between chemical pollutants and biological macromolecular compounds. In this study, three typical vermicompost samples were selected from the Yangtze River Delta region in China to investigate the antibiotic, heavy metal and corresponding antibiotic resistance genes (ARGs) and heavy metal resistance genes (HRGs). The results indicated the prevalence of tetracycline (TC), copper (Cu), zinc (Zn), cadmium (Cd), corresponding TC-resistance genes (tetA, tetC, tetW, tetM, tetO, and tetS) and HRGs (copA, pcoA, cusA, czcA, czcB, and czcR) in the three vermicompost samples. In addition, the ARG level was positively associated with the water-soluble TC fraction in the vermicompost, and it was same between the HRG abundance and exchangeable heavy metal content (p < 0.05). Moreover, a positive correlation was found between ARG and HRG abundance in the vermicompost samples, suggesting a close regulation mechanism involving the expression of both genes. The result obtained here could provide new insight into the controlling risk of heavy metals, TC, and relevant resistance genes mixed contamination in the vermicompost. (C) 2018 Elsevier Ltd. All rights reserved.
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