Archives of Microbiology

, Volume 164, Issue 6, pp 406–413

Desulfuromonas palmitatis sp. nov., a marine dissimilatory Fe(III) reducer that can oxidize long-chain fatty acids

  • John D. Coates
  • Debra J. Lonergan
  • Elizabeth J. P. Philips
  • Harry Jenter
  • Derek R. Lovley
Original Paper

DOI: 10.1007/BF02529738

Cite this article as:
Coates, J.D., Lonergan, D.J., Philips, E.J.P. et al. Arch. Microbiol. (1995) 164: 406. doi:10.1007/BF02529738

Abstract

Studies on the microorganisms living in hydrocarbon-contaminated sediments in San Diego Bay, California led to the isolation of a novel Fe(III)-reducing microorganism. This organism, designated strain SDBY1, was an obligately anaerobic, non-motile, non-flagellated, gram-negative rod. Strain SDBY1 conserves energy to support growth from the oxidation of acetate, lactate, succinate, fumarate, laurate, palmitate, or stearate. H2 was also oxidized with the reduction of Fe(III), but growth with H2 as the sole electron donor was not observed. In addition to various forms of soluble and insoluble Fe(III), strain SDBY1 also coupled growth to the reduction of fumarate, Mn(IV), or S0. Air-oxidizedminus dithionite-reduced difference spectra exhibited peaks at 552.8, 523.6, and 422.8 nm, indicative ofc-type cytochrome(s). Strain SDBY1 shares physiological characteristics with organisms in the generaGeobacter, Pelobacter, andDesulfuromonas. Detailed analysis of the 16S rRNA sequence indicated that strain SDBY1 should be placed in the genusDesulfuromonas. The new species nameDesulfuromonas palmitatis is proposed.D. palmitatis is only the second marine organism found (afterD. acetoxidans) to oxidize multicarbon organic compounds completely to carbon dioxide with Fe(III) as an electron acceptor and provides the first pure culture model for the oxidation of long-chain fatty acids coupled to Fe(III) reduction.

Key words

Desulfuromonas Fe(III) reduction Sulfur reduction Marine sediments Palmitate 

Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • John D. Coates
    • 1
  • Debra J. Lonergan
    • 1
  • Elizabeth J. P. Philips
    • 1
  • Harry Jenter
    • 1
  • Derek R. Lovley
    • 2
  1. 1.Water Resources DivisionU. S. Geological SurveyRestonUSA
  2. 2.Department of MicrobiologyUniversity of MassachusettsAmherstUSA

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