SUMMARY: Reduction of ferric lactate by washed cell suspensions of Bacillus circulans, B. megaterium and Aerobacter aerogenes takes place in the presence of suitable hydrogen donors. Ferric hydroxide is reduced when αα′-dipyridyl is present in the cell+substrate system. The reduction of ferric compounds by washed cells+substrate is similar to the reduction of methylene blue. Culture fluids of B. circulans do not reduce ferric iron in the absence of normal cells.
HalvorsonH. O.,
StarkeyR. L.1927; Studies on the transformations of iron in nature. Part II. Concerning the importance of micro-organisms in the solution and precipitation of iron. Soil Sci 24:381