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Transfer and distribution of antibiotic resistance genes in the soil-peanut system receiving manure for years

文献类型: 外文期刊

作者: Yue, Zhengfu 1 ; Zhang, Jing 1 ; Ding, Changfeng 1 ; Wang, Yurong 1 ; Zhou, Zhigao 1 ; Yu, Xiaolan 2 ; Zhang, Taolin 1 ; Wang, Xingxiang 1 ;

作者机构: 1.Chinese Acad Sci, Inst Soil Sci, CAS Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China

2.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Hainan Key Lab Trop Ecocircular Agr, Key Lab Low Carbon Green Agr Trop Reg China,Minist, Haikou 571101, Peoples R China

3.Chinese Acad Trop Agr Sci, Hainan Danzhou Trop Agroecosystem Natl Observat &, Danzhou 571737, Peoples R China

4.Chinese Acad Sci, Ecol Expt Stn Red Soil, Yingtan 335211, Peoples R China

5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

6.Chinese Acad Sci, Inst Soil Sci, 71 East Beijing Rd, Nanjing 210008, Peoples R China

关键词: Bacterial community; Horizontal gene transfer; Root uptake; Shell uptake; Source tracker

期刊名称:SCIENCE OF THE TOTAL ENVIRONMENT ( 影响因子:9.8; 五年影响因子:9.6 )

ISSN: 0048-9697

年卷期: 2023 年 869 卷

页码:

收录情况: SCI

摘要: Antibiotic resistance gene (ARG)-contaminated food from manure application is gaining widespread interest, but little is known about the distribution and uptake of ARGs in peanuts that are subjected to manure routinely. In this study, the ARG profile and bacterial community in soil and peanut plants from a 7-year manure-fertilized field were investigated using high-throughput qPCR and 16S rRNA gene sequencing. Manure application increased the abundance of ARGs in soil and peanuts by 59-72 and 4-10 fold, respectively. The abundance of ARGs from high to low was as follows: manure, shell-sphere soil, rhizosphere soil, bulk soil, stems, shells, needles, kernels, and roots. Source-tracker analyses were used to investigate the potential source of ARGs in peanut kernels, which revealed that the ARGs in peanut kernels may be primarily absorbed by the roots from the soil. The horizontal gene transfer (HGT) of ARGs was the primary factor in the spread of ARGs, and Proteobacteria were the primary agents of HGT between different parts of peanut plants. Additionally, norank_Chloroplast from the phylum Cyanobacteria was the most important contributor to the abundance of ARGs in peanut kernels. Overall, our findings fill a gap in our understanding of the distribution patterns of ARGs in peanut plants and the migratory pathways of ARGs from soil to peanut kernels.

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