Substrate-dependent competition and cooperation relationships between Geobacter and Dehalococcoides for their organohalide respiration

ABSTRACT: Obligate and non-obligate organohalide-respiring bacteria (OHRB) play central roles in the geochemical cycling and environmental bioremediation of organohalides. Their coexistence and interactions may provide functional redundancy and community stability to assure organohalide respiration efficiency but, at the same time, complicate isolation and characterization of specific OHRB. Here, we employed a growth rate/yield tradeoff strategy to enrich and isolate a rare non-obligate tetrachloroethene (PCE)-respiring Geobacter from a Dehalococcoides-predominant microcosm, providing experimental evidence for the rate/yield tradeoff theory in population selection. Surprisingly, further physiological and genomic characterizations, together with co-culture experiments, revealed three unique interacti

SUBMITTER: Liang Y 

PROVIDER: S-EPMC9723705 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature