Fig. 3

Iron-reducing capacities of the extracellular extracts produced by four fungi grown on Jerusalem artichoke stalk. Extracellular extracts are sampled after inoculation for 5, 10, 20, and 30 days, respectively. Extracts of Jerusalem artichoke stalk before fungal inoculation are used as reference. The data represent the mean of three replicates and the error bars indicate standard deviations from the mean values