期刊
ENVIRONMENTAL POLLUTION
卷 244, 期 -, 页码 28-37出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2018.10.022
关键词
Vermicompost; Heavy metal resistance gene; Tetracycline; Antibiotic resistance gene; Positive correlation
资金
- Jiangsu Provincial Natural Science Funds for Distinguished Young Scholar [BK20180110]
- National Natural Science Foundation of China [41771350, 41877134]
- Fundamental Research Funds for the Central Universities [Y0201700160]
- Environmental Protection Research Project in Jiangsu Provincial Environmental Department [2017005]
- Jiangsu Agricultural Science and Technology Innovation Fund [CX(17)3047]
- Scientific Apparatus Research and Development Program of Chinese Academy of Sciences [YJKYYQ20170057]
- Youth Innovation Promotion Association of the Chinese Academy of Sciences [2018350]
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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