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Fate of antibiotic resistance genes in cultivation substrate and its association with bacterial communities throughout commercial production of Agaricus bisporus

文献类型： 外文期刊

作者： Song, Shuang 1 ; Han, Meilin 1 ; Wang, Xuming 1 ; Wang, Shouxian 1 ; Qin, Wentao 1 ; Zhang, Yuduo 3 ; Liu, Yu 1 ; Sun, Xiaohong 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing 100097, Peoples R China

2.Beijing Engn Res Ctr Edible Mushroom, Beijing 100097, Peoples R China

3.Fangshan Dist Extens Stn Planting Technol, Beijing 102499, Peoples R China

4.Beijing Acad Agr & Forestry Sci, 9 Shuguang Huayuan Middle Rd, Beijing 100097, Peoples R China

关键词： Antibiotic resistance gene; Pasteurization; Agaricus bisporus; Mycelium proliferation; Bacterial community

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.8； 五年影响因子：6.9 ）

ISSN： 0147-6513

年卷期： 2023 年 249 卷

页码：

收录情况： SCI

摘要： Animal manure is an important raw material for Agaricus bisporus production; however, it is also a reservoir for antibiotic residues, antibiotic resistance genes (ARGs), and antibiotic-resistant bacteria. Little is known about the influence of the commercial cultivation of A. bisporus on the dynamics of ARGs and the underlying mechanisms that cause their variations. In this study, we investigated the fate of 285 ARGs, 10 mobile genetic elements, and seven major categories of antibiotic residues in substrate and mushroom samples at different production phases. The results showed that commercial substrate preparation, particularly the pasteurization phase, was highly efficient in removing ARGs from the substrate. We further found that mycelium proliferation of A. bisporus contributed significantly to the removal of ARGs from the substrate and casing soil. The bacterial community is the key driver of changes in ARGs during the commercial cultivation of A. bisporus, which explained 46.67% of the variation in ARGs. Our results indicate that, despite the addition of animal manure, the risk of ARG dissemination to fruiting bodies and the environment is low. We propose that bioremediation by specific edible fungi might be a novel and promising method for scavenging antimicrobial resistance contamination from soil environment.

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