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In silico analysis of phages-nanogen interplay : human gastrointestinal tract microbiota dynamics and clinical perspectives
Ihab Malat, Michel Drancourt, B. Henrissat, Ghiles Grine, 2026, original scientific article

Abstract: Digestive tract nanoarchaea Nanopusillus massiliensis and Candidatus Nanopusillus phoceensis form symbiotic nanogens with residing methanogens Methanobrevibacter oralis and Methanobrevibacter smithii, preventing their translocation by unknown mechanisms. We found that 0.45% of M. oralis YH nanogen genome encoding 18 proteins and 1.12% of M. smithii KB11 nanogen genome encoding 32 proteins were of Caudoviricetes and NAV1 origin. In block encoded glycosyltransferase and S-adenosyl-methionine-dependent methyltransferase confer nanogens (but not methanogens) a capacity in cell wall glycosylation. This hypothetical deduced cell wall glycosylation could prevent pseudomurein endo-isopeptidase-mediated interactions of nanogens with digestive tract virome and further nanogen translocation. These observations renew understanding of methanogen and nanogen-associated physiology and pathologies in the digestive tract and beyond.
Keywords: Archaeal virome, Methanogens, CRISPR-Spacers, Caudoviricetes, Human microbiome, Microbial diversity, Mobile genetic elements, Nanoarchaea, Nanogen, Methanobrevibacter smithii, Methanobrevibacter oralis
Published in RUP: 18.06.2026; Views: 317; Downloads: 9
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The influence of bacterial inoculants and a biofertilizer on maize cultivation and the associated shift in bacteriobiota during the growing season
Katarina Kruščić, Aleksandra Jelušić, Matjaž Hladnik, Tamara Janakiev, Jovana Anđelković, Dunja Bandelj, Ivica Dimkić, 2025, original scientific article

Abstract: Maize (Zea mays L.) relies heavily on nitrogen and phosphorus inputs, typically supplied through organic and inorganic fertilizers. However, excessive agrochemical use threatens soil fertility and environmental health. Sustainable alternatives, such as poultry manure (PM) and plant growth-promoting rhizobacteria (PGPR), offer promising solutions. This study examines the effects of a phytobiotic bacterial formulation (PHY), composed of Bacillus subtilis and Microbacterium sp., applied alone and in combination with PM, on maize’s rhizosphere bacteriobiome across key growth stages. Field trials included four treatments: a control, PHY-coated seeds, PM, and combined PHY_PM. The results show that early in development, the PM-treated rhizospheres increased the abundance of beneficial genera such as Sphingomonas, Microvirga, and Streptomyces, though levels declined in later stages. The PHY_PM-treated roots in the seedling phase showed a reduced abundance of taxa like Chryseobacterium, Pedobacter, Phyllobacterium, Sphingobacterium, and Stenotrophomonas, but this effect did not persist. In the PM-treated roots, Flavisolibacter was significantly enriched at harvesting. Overall, beneficial bacteria improved microbial evenness, and the PHY_PM treatment promoted bacterial diversity and maize growth. A genome analysis of the PHY strains revealed plant-beneficial traits, including nutrient mobilization, stress resilience, and biocontrol potential. This study highlights the complementarity of PM and PGPR, showing how their integration reshapes bacteriobiome and correlates with plant parameters in sustainable agriculture.
Keywords: maize, plant growth-promoting rhizobacteria (PGPR), poultry manure, microbiome, biocontrol, sustainable agriculture
Published in RUP: 10.06.2025; Views: 1361; Downloads: 44
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