Dissimilatory manganese reduction

Lovley DR, EJP Phillips (1988) Novel mode of microbial energy metabolism organic carbon oxidation coupled to dissimilatory reduction of iron or manganese. Appl Environ Microbiol 54 1472-1480. 

Lovley, D. R and E. J. P. Phillips (1988), "Novel Mode of Microbial Energy Metabolism Organic Carbon Oxidation Coupled to Dissimilatory Reduction of Iron or Manganese", Applied and Environ. Microbiology 54/6, 1472-1480. 

Lovley DR, Phillips EJP (1988) Novel mode of microbial energy metabolism organic carbon oxidation coupled to dissimilatory reduction of iron or manganese. App Environ Microbio 54 1472-1480 Lovley DR, Stolz JF, Nord Jr GL, Phillips EJP (1987) Anaerobic production of magnetite by a dissimilatoiy iron-reducing microorganism. Nature 330 252-254... 

Lovley, D., Phillips, E.J.P., and Lonergan, D.J. (1989) Hydrogen and formate oxidation coupled to dissimilatory reduction of iron and manganese by Alteromonas putrefaciens. Appl. Environ. Microbiol. 55, 700-706. 

Dissimilatory sulfate (S04 H2S) Dimethyl sulfide production (CHaljS Metal cycles Iron and manganese oxidation and reduction... 

Fig. 7.16 Pore water and extraction results from hemipelagic sediments off Uruguay (redrawn from Haese et al. 2000). Dissolution and precipitation of Fe is reflected by the easy reducible iron oxyhydroxide fraction whereas less reducible iron oxides soluble by subsequent citrate/dithionite/bicarbonate (CDB) extraction remain constant. A concurrent liberation of Mn and Fe indicates dissimilatory iron reduction and subsequent iron reoxidation by manganese oxides, which results in the build-up of Mn Under these conditions the actual dissimilatory iron reduction rate is higher than deduced from iron pore water gradients.

Table 7.3 Summary of results quantifying the relative contribution of dissimilatory iron and manganese reduction for the decomposition of organic matter.

A conceptual model describing the importance of iron and manganese reactivity in different environments is only sketchy as results are scarce and manifold aspects deserve further investigations. A general complication concerns the differentiation of dissimilatory and chemical reduction of Mn-oxide when concurrent iron reduction is apparent and further investigations need to discriminate each reaction pathway. The reactivity of smectite-bound iron has only been shown qualitatively (Kostka et al. 1996 Konig et al. 1997), yet quantifications with respect to dissimilatory and/or chemical reactions are missing. An important role of adsorbed Fe + /... 

Lovley, D. R. 2004. Dissimilatory Ee(III) and Mn(IV) reduction. Adv. Microbiol. Physiol. 49 219-286. Madigan, M. and J. Martinko. 2006. Brock Biology of Microorganisms. 11th Edition. Benjamin Cummings. Nealson, K. and D. Saffarini. 1994. Iron and manganese in anaerobic respiration. Annu. Rev. Microbiol. 48 311-343. 

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