Baltic Sea methanogens compete with acetogens for electrons from metallic iron.

ABSTRACT: Microbially induced corrosion of metallic iron (Fe⁰)-containing structures is an environmental and economic hazard. Methanogens are abundant in low-sulfide environments and yet their specific role in Fe⁰ corrosion is poorly understood. In this study, Sporomusa and Methanosarcina dominated enrichments from Baltic Sea methanogenic sediments that were established with Fe⁰ as the sole electron donor and CO₂ as the electron acceptor. The Baltic-Sporomusa was phylogenetically affiliated to the electroactive acetogen S. silvacetica. Baltic-Sporomusa adjusted rapidly to growth on H₂. On Fe⁰, spent filtrate enhanced growth of this acetogen suggesting that it was using endogenous enzymes to retrieve electrons and produce acetate. Prev

SUBMITTER: Palacios PA 

PROVIDER: S-EPMC6864099 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature