Dissimilatory iron iii reducing bacteria
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Dissimilatory Iron(III) Reducing Bacteria. Camille Jones Hopkins Microbiology Course 2012. What do they do?. Shewanella sp . Simple Fermentation Products + Fe(OH) 3  Fe 2+ + HCO 3 -. Image: Pacific Northwest National Laboratory . Who are they?.

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Dissimilatory Iron(III) Reducing Bacteria

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Dissimilatory Iron(III)Reducing Bacteria

Camille Jones

Hopkins Microbiology Course

2012


What do they do?

Shewanellasp.

Simple Fermentation Products + Fe(OH)3  Fe2+ + HCO3-

Image: Pacific Northwest National Laboratory


Who are they?

Lovley, DR, Holmes, DE, Nevin, KP. 2004. Dissimilatory Fe(III) and Mn(IV) Reduction. Advances in Microbial Physiology


How do you isolate them?

t = 0

t = transfer

t = initial

Lactate

Fe(III)-

hydroxide

No O2

Magnetite

Ferrihydrite

Images: Katrin Richter and Camille Jones


2012 HMC Results


Environmental Connections

  • Links with nitrogen (N) and uranium (U) cycles

  • Promotion of arsenic (As) contamination

  • Aromatic hydrocarbon contaminant degradation

  • Microbial fuel cells


Environmental

Dynamics

Niche: High Fe(III)

No other e- acceptors

Selection

Ecological

Evolutionary

Shewanellasp.

Geobactersp.

Fitness


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