Syntrophic Partners Enhance Growth and Respiratory Dehalogenation of Hexachlorobenzene by Dehalococcoides mccartyi Strain CBDB1.

ABSTRACT: This study investigated syntrophic interactions between chlorinated benzene respiring Dehalococcoides mccartyi strain CBDB1 and fermenting partners (Desulfovibrio vulgaris, Syntrophobacter fumaroxidans, and Geobacter lovleyi) during hexachlorobenzene respiration. Dechlorination rates in syntrophic co-cultures were enhanced 2-3 fold compared to H₂ fed CBDB1 pure cultures (0.23 ± 0.04 μmol Cl^- day^-1). Syntrophic partners were also able to supply cobalamins to CBDB1, albeit with 3-10 fold lower resultant dechlorination activity compared to cultures receiving exogenous cyanocobalamin. Strain CBDB1 pure cultures accumulated ~1 μmol of carbon monoxide per 87.5 μmol Cl^- released during hexachlorobenzene respiration resulting in decr

SUBMITTER: Chau ATT 

PROVIDER: S-EPMC6113397 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature