Interspecies electron transfer as one of key drivers of methanogenic consortia succession within quorum sensing regulation.

ABSTRACT: Robust interspecies interactions are essential for efficient methanogenesis in anaerobic digestion. This study investigated the impact of quorum sensing (QS) enhancement on the succession of methanogenic communities during anaerobic digestion. The QS stimulation via exogenous N-acyl-homoserine lactones enhanced methane production by 18.8%-22.1%. Moreover, QS shaped microbial community succession toward a more deterministic assembly, selectively enriching key syntrophs (Pelotomaculum, Smithella), and methanogens (Methanobacterium, Methanothrix). Metagenomic analysis revealed that QS induced genes related to transcription, transport, and cofactor biosynthesis instead of directly regulating carbon metabolism. In this context, interspecies electron transfer emerges

SUBMITTER: Zhao S 

PROVIDER: S-EPMC12503159 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature