dissimilatory iron reduction

Edge evidence

• iron(3+) oxidized to iron(2+) METPO:2007405

  Fe(III) is reduced to Fe(II) as DIR terminal-acceptor chemistry.

  • DOI:10.1128/mr.55.2.259-287.1991 Lovley establishes Fe(III) reduction coupled to organic-matter oxidation as energy-conserving anaerobic respiration.
• iron(3+) enables dissimilatory iron reduction RO:0002327

  Fe(III) acts as terminal electron acceptor enabling DIR.

  • PMID:7826009 Nealson & Saffarini support Fe(III) as a terminal electron acceptor competitive with nitrate.
• dissimilatory iron reduction is a energy-conserving anaerobic respiration rdfs:subClassOf

  DIR is a form of energy-conserving anaerobic respiration.

  • DOI:10.1128/mr.55.2.259-287.1991 Organisms can obtain energy by completely oxidizing organic compounds to CO2 with Fe(III) or Mn(IV) as the sole acceptor.
• oxidation of organic matter coupled to iron(3+)

  Oxidation of organic matter is coupled to Fe(III) reduction in DIR.

  • DOI:10.1128/mr.55.2.259-287.1991 The oxidation of organic matter coupled to the reduction of Fe(III) or Mn(IV) is the direct result of enzymatic activity of specialized microorganisms.
• H2 oxidation coupled to iron(3+)

  H2 oxidation can serve as the electron donor coupled to Fe(III) reduction.

  • DOI:10.1128/mr.55.2.259-287.1991 Abundant evidence that H2 oxidation can be coupled to Fe(III)/Mn(IV) reduction in sediments.
• dissolved Fe(III)-organic-matter complex reduced faster than solid Fe(III) mineral

  Dissolved Fe(III)-OM complexes are reduced at significantly higher rates than solid Fe(III) minerals.

  • DOI:10.1007/s10533-024-01186-4 The reduction rates of dissolved Fe(III)-OM complexes are significantly higher than those observed for solid Fe(III) minerals.