The Relationship Between Tolerance and Respond of Saccharomyces cerevisiae Strains Against Different Stress Treatments

Behaviour of Saccharomyces cerevisiae Strains


  • hatice aybuke karaoglan Sivas Cumhuriyet University
  • filiz ozcelik Ankara University



Saccharomyces cerevisiae, temperature stress, ethanol stress, intacellular trehalose


This study evaluated the stress tolerance and stress responds of three indigenous Saccharomyces cerevisiae strains and one reference strain against temperature (45°C, 50°C, and 55°C) and ethanol (12 and 14%) stresses over time by assessing the yeast counts and intracellular trehalose content. The maximum decrease in the yeast counts was at 55°C and 14%, and also, 45°C and 14% caused highest intracellular trehalose content for all strains when each treatment evalulated among its variables (P < 0.05). The correlation between the trehalose content and Log N levels of the strains was significant with the correlation coefficient (r) 0.62 and 0.39 for strains 2 and 7 against temperature stress, also a strong and significant correlation was determined with r values for strains 2,7, 47 against ethanol stress, respectively (P < 0.05).





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