Evaluating the impact of biochar amendment on antibiotic resistance genes and microbiome dynamics in soil, rhizosphere, and endosphere at field scale

Biochar amendment is a promising strategy for mitigating antibiotic resistance genes (ARGs) in soil and plants, but its effects on ARGs at field scale are not fully understood. Here, field trials were executed utilizing two plant varieties, Brassica juncea and Lolium multiflorum, with four types of...

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Bibliographic Details
Published in:Journal of hazardous materials 2024-09, Vol.477, p.135440, Article 135440
Main Authors: Zhou, Zhenchao, Cui, Erping, Abid, Abbas Ali, Zhu, Lin, Xu, Jianming, Chen, Hong
Format: Article
Language:English
Subjects:
Antibiotic resistance genes
Bacterial communities
Biochar
Rhizosphere
Soil
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Summary:Biochar amendment is a promising strategy for mitigating antibiotic resistance genes (ARGs) in soil and plants, but its effects on ARGs at field scale are not fully understood. Here, field trials were executed utilizing two plant varieties, Brassica juncea and Lolium multiflorum, with four types of biochar to investigate changes in ARGs and microbiome in soil, rhizosphere, root endophytes, and leaf endophytes. Results showed that biochar altered ARG distribution in soil and plant, and restrained their transmission from soil and rhizosphere to endophytes. A reduction of 1.2–2.2 orders of magnitude in the quantity of ARGs was observed in root and leaf endophytes following biochar addition, while no significant changes were observed in soil and rhizosphere samples. Procrustes and network analyses revealed significant correlations between microbial communities and mobile genetic elements with ARGs (P 
ISSN:0304-3894
1873-3336
1873-3336
DOI:10.1016/j.jhazmat.2024.135440