Microbial organic fertilizer prepared by co-composting of Trichoderma dregs mitigates dissemination of resistance, virulence genes, and bacterial pathogens in soil and rhizosphere
文献类型： 外文期刊
作者： Huang, Bin 1 ; Lv, Xiaolin 1 ; Zheng, Hao 2 ; Yu, Haitao 3 ; Zhang, Yu 1 ; Zhang, Chengsheng 1 ; Wang, Jie 1 ;
作者机构： 1.Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao 266101, Peoples R China
2.Ocean Univ China, Inst Coastal Environm Pollut Control, Key Lab Marine Environm & Ecol, Minist Educ, Qingdao 266100, Peoples R China
3.Gansu Acad Agr Sci, Inst Plant Protect, Lanzhou 730070, Peoples R China
4.11 Keyuanjingsi Rd, Qingdao 266101, Shandong, Peoples R China
关键词： Trichoderma dregs; Microbial organic fertilizer; Resistome; Virulence gene; Bacterial pathogen
期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：8.3； 五年影响因子：8.2 ）
ISSN： 0013-9351
年卷期： 2024 年 241 卷
页码：
收录情况： SCI
摘要： The use of manure, mycelium dregs and other waste as organic fertilizer is the main source of antibiotic resis-tance genes (ARGs) and pathogens in farmland. Composting of waste may effectively remove ARGs and path-ogens. However, the profiles and drivers of changes in metal resistance genes (MRGs), biocide resistance genes (BRGs), and virulence genes (VGs) in soil-crop rhizosphere systems after compost application remain largely unknown. Here, we prepared two kinds of microbial organic fertilizers (MOF) by using Trichoderma dregs (TDs) and organic fertilizer mixing method (MOF1) and TDs co-composting method (MOF2). The effects of different types and doses of MOF on resistance genes, VGs and pathogens in soil-rhizosphere system and their potential mechanisms were studied. The results showed that co-composting of TDs promoted the decomposition of organic carbon and decreased the absolute abundance of ARGs and mobile genetic elements (MGEs) by 53.4-65.0%. MOF1 application significantly increased the abundance and diversity of soil ARGs, BRGs, and VGs, while low and medium doses of MOF2 significantly decreased their abundance and diversity in soil and rhizosphere. Patterns of positive co-occurrence between MGEs and VGs/MRGs/BRGs/ARGs were observed through statistical analysis and gene arrangements. ARGs/MRGs reductions in MOF2 soil were directly driven by weakened hori-zontal gene transfer triggered by MGEs. Furthermore, MOF2 reduced soil BRGs/VGs levels by shifting bacterial communities (e.g., reduced bacterial host) or improving soil property. Our study provided new insights into the rational use of waste to minimize the spread of resistomes and VGs in soil.
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