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Spot plate assay of the wild-type BY4741 strain (WT) and isogenic mutant sod1Δ (sod1Δ) treated with extracts and ferments (F10 and F20) of R. nigrum, A. melanocarpa, and V. myrtillus and additionally treated with 1 mM hydrogen peroxide for 1 h (WT+ 1 mM H2O2 and sod1Δ + 1 mM H2O2). Strains were serially diluted (as indicated (106 to 103). Each spot assay was performed in triplicate.
