Articles | Volume 14, issue 22
Research article
20 Nov 2017
Research article |  | 20 Nov 2017

Ferrihydrite-associated organic matter (OM) stimulates reduction by Shewanella oneidensis MR-1 and a complex microbial consortia

Rebecca Elizabeth Cooper, Karin Eusterhues, Carl-Eric Wegner, Kai Uwe Totsche, and Kirsten Küsel

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Cited articles

Adhikari, D., Zhao, Q., Das, K., Mejia, J., Huang, R., Wang, X., Poulson, S. R., Tang, Y., Roden, E. E., and Yang, Y.: Dynamics of ferrihydrite-bound organic carbon during microbial Fe reduction, Geochim. Cosmochim. Ac., 212, 221–233,, 2017.
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Short summary
In this study we show increasing organic matter (OM) content on ferrihydrite surfaces enhances Fe reduction by the model Fe reducer S. oneidensis and a microbial consortia extracted from peat. Similarities in reduction rates between S. oneidensis and the consortia suggest electron shuttling dominates in OM-rich soils. Community profile analyses showed enrichment of fermenters with pure ferrihydrite, whereas OM–mineral complexes favored enrichment of Fe-reducing Desulfobacteria and Pelosinus sp.
Final-revised paper