数字农科院2.0

Microplastics enhance the prevalence of antibiotic resistance genes in mariculture sediments by enriching host bacteria and promoting horizontal gene transfer

文献类型： 外文期刊

作者： Yifan Liu;Liuqingqing Liu;Xiao Wang;Mengying Shao;Zihan Wei;Lina Wang;Bing Li;Chenguang Li;Xianxiang Luo;Fengmin Li;Hao Zheng

作者机构：

关键词： Antimicrobial resistance;Biofilm colonization;Horizontal gene transfer;Microbial community;Plastic additives;Plastisphere

期刊名称： Eco-Environment and Health

ISSN： 2772-9850

年卷期： 2025 年 4 卷 1 期

页码：

收录情况： CSCD（2025-2026年度） ; ; ESCI（2025版）

摘要： Microplastics (MPs) and antibiotic resistance genes (ARGs) pose significant challenges to the One Health framework due to their intricate and multifaceted ecological and environmental impacts. However, the understanding of how MP properties influence ARG prevalence in mariculture sediments remains limited. Herein, the polystyrene (PS) and polyvinyl chloride (PVC) MPs with different sizes (20–120 μm and 0.5–2.0 mm) were selected to evaluate their impacts and underlying mechanisms driving ARGs dissemination. The results showed that PS and PVC MPs increased the relative abundance of ARGs by 1.41–2.50-fold and 2.01–2.84-fold, respectively, compared with control, particularly high-risk genes. The polymer type effect was identified as more influential than the size effect in driving the sediment resistome evolution. PVC shifted the microbial community assembly from stochastic to deterministic processes, thus enriching ARG host pathogens. Furthermore, the highly hydrophobic PS not only recruited the host bacteria colonization but also facilitated ARG exchange within the plastisphere. The exogenous additives released by PVC (e.g., heavy metals, bisphenol A, and tridecyl ester) and the particles synergistically promoted ARG conjugative transfer by inducing oxidative stress and enhancing cell membrane permeability. These findings revealed how MPs characteristics facilitated the spread of ARGs in marine benthic ecosystems, underscoring the importance of mitigating MPs pollution to maintain mariculture ecosystem health, prevent zoonotic diseases, and balance global mariculture with ecological health.

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