A comparison of manganese oxidation by growing and resting cells of a freshwater bacterial isolate, strain FMn 1

Abstract

A bacterial isolate, strain FMn 1, from reservoir sediment oxidized MN2+ when tested in growing culture and resting-cell suspension. The oxidation was biologically mediated and not the result of autoxidation because at a MnSO4 . H2O concentration of 0.05%, the pH remained below 7.5 for the duration of the experiments. The production of manganese oxide was qualitatively and quantitatively demonstrated. The manganese-oxidizing activity of this organism was found to be inducible.