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The effect of long-term application of nitrogen-rich fertilizers on soil resistome: A study of conventional and organic cropping systems

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SOIL ECOLOGY LETTERS 2024年第3期6卷 230215-230215页

作者： Vasilchenko, Alexey S. Burlakov, Evgenii O. Poshvina, Darya V. Gruzdev, Denis S. Kravchenko, Sergey V. Iashnikov, Aleksandr V. Ling, Ning Vasilchenko, Anastasia V. Tyumen State Univ Inst Environm & Agr Biol X BIO Lab Antimicrobial Resistance Tyumen Russia Derzhavin Tambov State Univ Res Inst Math Phys & Comp Sci Tambov Russia Tyumen State Univ Inst Environm & Agr Biol X BIO Int Integrated Res Lab Study Climate Change Land U Tyumen Russia SciBear OU Tartu Mnt 67-1-13b EE-10115 Tallinn Estonia Lanzhou Univ Coll Pastoral Agr Sci & Technol Ctr Grassland Microbiome State Key Lab Grassland Agroecosyst Lanzhou 730000 Peoples R China

Soil resistomes of conventional and organic systems were similar in terms of ARG *** resistomes of conventional and organic systems were different regarding individual *** bacteria and archaea can contribute significantly to soil *** studies of various soil environments have previously revealed the widespread distribution of antibiotic resistance genes (ARGs) around the globe. In this study, we applied shotgun metagenomics to investigate differences in microbial communities and resistomes in Chernozem soils that have been under long-term organic and conventional cropping practices. The organic cropping system was seeded with Triticum spelta without any fertilizer. The conventional cropping system was seeded with Triticum durum Desf and used mineral fertilizer (NPK), that resulted in an increased amount of total and available carbon and nitrogen in soils. Across all samples, we identified a total of 21 ARG classes, among which the dominant were vancomycin, tetracycline and multidrug. Profiling of soil microbial communities revealed differences between the studied fields in the relative abundances of 14 and 53 genera in topsoil and subsoil, respectively. Correlation analysis showed significant correlations (positive and negative) among 18 genera and 6 ARGs, as well as between these ARGs and some chemical properties of soils. The analysis of metagenome-assembled genomes revealed that Nitrospirota, Thermoproteota, Actinobacteriota and Binatota phyla of archaea and bacteria serve as hosts for glycopeptide and fluoroquinolone/tetracycline ARGs. Collectively, the data obtained enrich knowledge about the consequences of human agricultural activities in terms of soil microbiome modification and highlight the role of nitrogen cycling taxa, including uncultivated genera, in the formation of soil resistome.

关键词： soil microbiome inorganic fertilizer nitrogen cycle uncultured bacteria chemolithotrophs binatia ANTIBIOTIC-RESISTANCE GENES CHEMICAL FERTILIZERS BIOLOGICAL-CONTROL QUALITY ABUNDANCE AMENDMENTS GENOMES BLIGHT MANURE

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