Research Note: Individual and Combined Effects of Vanillin and Potassium Sorbate on Penicillium digitatium, Penicillium glabrum, and Penicillium italicum Growth

摘要

The individual and combined effects of potassium sorbate and vanillin concentrations on the growth of Penicillium digitatum, P, glabrum, and P. italicum in potato dextrose agar adjusted to water activity 0.98 and pH 3.5 were evaluated. Inhibitory concentrations of potassium sorbate varied from 150 ppm for P. digitatum to 700 ppm for P. glabrum, and for Vanillin from 1, 100 ppm for P. digitatum and P. italicum and 1, 300 ppm for P. glabrum. Fractional inhibitory concentration (FIC) isobolograms show curves deviated to the left of the additive line. Calculated FIC index varied form 0.60 to 0.84. FIC index as well as FIC isolograms show synergistic effects on mold inhibition when vanillin and potassium sorbate are applied in combination.