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Article Abstract
The temporal dynamics of bacterial and fungal communities significantly impact the manure composting process, yet viral communities are often underexplored. Bulk metagenomes, viromes, metatranscriptomes, and metabolomes were integrated to investigate dynamics of double-stranded DNA (dsDNA) virus and virus-host interactions throughout a 63-day composting process. A total of 473 viral operational taxonomic units (vOTUs), predominantly Caudoviricetes, showed distinct phase-dependent differentiation. In phase I (initial-mesophilic), viruses targeted Gammaproteobacteria and Firmicutes, utilizing restriction-modification (RM) systems. In phase II (thermophilic-maturing), viruses infected Alphaproteobacteria, Chloroflexi, and Planctomycetes, employing CRISPR-Cas systems. Lysogenic and lytic viruses exerting differential effects on bacterial pathogens across phases. Additionally, six types of auxiliary metabolic genes (AMGs) related to galactose and cysteine metabolisms were identified. The homologous lineages of AMGs with bacterial genes, along with the significant temporal correlation observed between virus-host-metabolite interactions, underscore the critical yet often overlooked role of viral communities in modulating microbial metabolisms and pathogenesis within composting ecosystems.
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| http://dx.doi.org/10.1016/j.biortech.2025.132081 | DOI Listing |
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