Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 692, Issue -, Pages 422-431Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2019.07.285
Keywords
Soil amendment; Azolla imbricata; Antibiotic; Resistance gene; Heavy metal
Categories
Funding
- Science and Technology Innovation Project of Water Pollution Control and Treatment of Wenzhou City [S20150001]
- Zhejiang Public Welfare Technology Application Research Project [2017C32084]
Ask authors/readers for more resources
The floating aquatic plant of Azolla imbricata has an outstanding purification capability for polluted river water, and it is also employed to improve soil fertility. However, the occurrence and distribution of antibiotic resistance genes (ARGs) in soil amended using Aimbricata remain unclear. In the soil amendment with A. imbricata, heavy metals, antibiotics, transposase genes, ARGs, and bacterial communities in the soil were determined in this study. The results indicated that the diversity of bacteria and ARGs increased, while the diversity of ARGs decreased under the amendment using an appropriate amount of A. imbricata. The Firmicutes, Chloroflexi, Actinobacteria, and Cyartobacteria were the main host bacteria of ARGs. The vertical gene transfer of ARGs was weak, and the horizontal gene transfer became the dominant transfer pathway of ARGs. The amendment with A. imbricata altered the distribution of heavy metals, antibiotics, transposase genes, ARGs, and dominant bacteria. The amendment using A. imbricata promoted the degradation of antibiotics, decreased the concentrations of available heavy metals, and eliminated the abundance of ARGs and transposase genes. Our findings suggested a comprehensive effect of multiple stresses on the fate of ARGs in soil amended with A. imbricata, providing an insight into the distribution and propagation of ARGs in soil amended using plant residues. (C) 2019 Elsevier B.V. All tights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available