Recruitment, Colonization, and Functional Integration of Beneficial Microbial Products Across Host Microbiomes

Beneficial microbial products play essential roles in maintaining the health of humans, animals, and plants, yet the mechanisms governing their successful establishment within complex microbial communities remain incompletely understood. While probiotics, plant growth-promoting rhizobacteria (PGPR), and biocontrol agents have demonstrated considerable promise, their effectiveness in real-world settings is often limited by inconsistent colonization, persistence, and functional integration into established microbiomes. Recent advances in microbial ecology, systems biology, multi-omics, and spatial microbiology have shifted attention from cataloguing microbial composition to understanding the ecological and molecular principles that determine successful colonization and long-term functionality. This Research Topic focuses on the central question: What determines the successful recruitment, persistence, and functional integration of beneficial microbial products within complex host-associated microbiomes? Addressing this question requires integrating molecular bacteriology, microbial ecology, host–microbe interactions, and systems-level approaches to understand how beneficial microorganisms compete for resources, establish stable niches, interact with resident microbial communities, and ultimately confer measurable host benefits. Successful colonization is driven by coordinated ecological and molecular mechanisms, including nutrient competition, biofilm formation, quorum sensing, antimicrobial metabolite production, stress adaptation, immune modulation, and metabolic cross-feeding with both the host and resident microbiota. Understanding these mechanisms is essential for the rational design of next-generation probiotics, engineered microbial consortia, and biocontrol strategies that perform reliably under diverse environmental and clinical conditions. By bringing together studies spanning human, animal, and plant microbiomes, this Research Topic seeks to identify conserved biological principles governing beneficial microbial product establishment while highlighting system-specific adaptations that can accelerate translation into clinical, veterinary, and agricultural applications. We welcome submissions addressing topics including:• Ecological principles governing recruitment, colonization, persistence, and microbiome assembly• Molecular and metabolic mechanisms underlying beneficial bacterial establishment and host interactions• Host responses, including immune modulation, nutrient provisioning, pathogen suppression, and colonization resistance• Multi-omics, spatial microbiology, computational modelling, and systems biology approaches to studying colonization dynamics• Rational design, engineering, and field validation of probiotics, microbial consortia, and biocontrol strategies• Comparative studies identifying conserved mechanisms across human, animal, and plant microbiomes• Mechanistic studies linking beneficial microbial products colonization to disease prevention and improved host fitness Topic editors: Sneha Rani A H, Wei Yang, Yogesh Kumar Source: https://www.frontiersin.org/research-topics/83062/recruitment-colonization-and-functional-integration-of-beneficial-microbial-products-across-host-microbiomes