Symbiotic Networks Driving Lignocellulose Degradation: Ecological Foundations and Engineered Consortia

Lignocellulose degradation forms a cornerstone of the global carbon cycle and represents a vital process for transforming plant biomass into accessible carbon and energy sources. In natural ecosystems, this transformation is achieved mainly through complex microbial symbioses rather than single-organism activity. The study of these microbial networks, comprising syntrophic interactions, cross-feeding, and mutualistic dynamics, has revealed that cooperation among diverse species is essential for efficient cellulose and lignin breakdown. Yet, despite advances in multi-omics and ecological modeling, the assembly rules, stability mechanisms, and co-evolutionary trajectories governing these symbiotic communities remain incompletely understood. Questions persist regarding how microbial species coordinate metabolic handoffs, how environmental shifts disrupt or reinforce symbiotic structure, and how such interactions evolved to optimize lignocellulose utilization across habitats such as soil, ruminant digestive systems, and termite guts. A deeper understanding of these processes has the potential to illuminate fundamental ecological principles while supporting the rational design of microbial consortia for bioenergy and material valorization.

This Research Topic aims to integrate ecological, mechanistic, and applied perspectives on symbiotic lignocellulose degradation. Specifically, it seeks to uncover the molecular dialogues and evolutionary strategies that sustain cooperation among lignocellulolytic microorganisms and to translate these natural strategies into synthetic, biotechnologically relevant systems. Key objectives include identifying the organizational principles underlying microbial symbiotic networks, elucidating the metabolic interdependencies that enable efficient resource partitioning, and exploring how engineered or natural communities can be optimized for industrial biorefinery applications. The initiative also aims to bridge basic microbial ecology with applied biotechnology, promoting interdisciplinary discussion between environmental microbiologists, systems biologists, and metabolic engineers.

We welcome articles addressing, but not limited to, the following themes:
o Ecology and diversity of lignocellulolytic microbial communities across natural and engineered environments
o Metabolic interdependencies, syntrophy, and division of labor in lignocellulose degradation
o Co-evolutionary mechanisms shaping microbial partnerships and host-microbiome interactions
o Communication and signaling processes maintaining stability in symbiotic systems
o Community assembly, resilience, and responses to ecological perturbation or dysbiosis
o Multi-omics approaches for mapping interaction and metabolic networks in lignocellulolytic consortia
o Translation of ecological insights into the design and optimization of synthetic microbial consortia for biorefinery and bioenergy applications
o Assessment on evaluating environmental impacts and sustainability metrics of symbiotic bioprocesses and cases on integrating symbiotic microbial processes into sustainable resource recovery systems.

Article types and fees

This Research Topic accepts the following article types, unless otherwise specified in the Research Topic description:

• Editorial
• FAIR² Data
• Hypothesis and Theory
• Methods
• Mini Review
• Opinion
• Original Research
• Perspective
• Review
• ... View all formats

Articles that are accepted for publication by our external editors following rigorous peer review incur a publishing fee charged to Authors, institutions, or funders.

Article types

This Research Topic accepts the following article types, unless otherwise specified in the Research Topic description:

• Editorial
• FAIR² Data
• Hypothesis and Theory
• Methods
• Mini Review
• Opinion
• Original Research
• Perspective
• Review
• Systematic Review
• Technology and Code

Keywords: lignocellulosic biomass, syntrophy, co-evolution, ecological networks, microbial consortia, lignocellulolytic microorganisms, biorefinery

Important note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.