In vitro effect of specific culture medium containing potato and banana extracts as prebiotics on the growth of yeast (Saccharomyces cerevisiae)

The aim of this study was to determine the effect of prebiotic properties of potato and banana on the growth of Saccharomyces cerevisia yeast. To perform this experiment, S. cerevisia was prepared as lyophilized and after culturing in Sabouraud dextrose broth medium, it was cultured on agar culture medium; the obtained colonies inoculated to the free-glucose media containing concentrations of 2, 6.25, 12.5, 25, 50, 75 and 100 percent of banana and potato extractions as prebiotics; then, the growth rate of S. cerevisia was measured according to the growth curve and optical density was read by spectrophotometer at a wavelength of 600 nm. The results showed that the growth of S. cerevisia in both media containing banana and potato extracts at a concentration of 100% had a significant increase compared to other treatments; Also, the highest growth rate of treatments containing banana and potato extract with 100% concentration were significantly different from each other. According to the results of this study, banana and potato extract can be used as a prebiotic substance for the growth of Saccharomyces cerevisiae.