Influence of plant extracts on functional activity and intracellular metabolite of brewing yeast

The aim of research to study the effect of aralia extracts on biological activity and morphology of S. cerevisiae during their life. Methods and result. The aqueous alcoholic extracts of aralia roots, branches and leaves were used; content of glycosides in the extracts was equal to 0.15-0.12 mg/100 ml, respectively. For determination of the effect of aralia extracts on the biological activity of the yeast we prepared the culture fluids – the sample of the beer wort which was used as a control specimen and three test samples to which aralia extracts were added prior to stationary growth phase. The ability of yeast in the flocculation, number of viable cells, their morphology, intracellular content of glycogen and ultrastructure of yeasts was studied Result. The cells of test samples had pronounced morphological differences from the cells of control sample which were indicative of intensified metabolic processes and increased period of activity under the influence of aralia extracts. As, the extracts of Araliaceae obtained from different organs of the plants are the stimulants of biological activity of S. cerevisiae yeast cells, but the action of leaves extracts is more pronounced. Discussion. This study increases our understanding about influence of biologically active substances plans on the function and activity of yeast. This date can be used in practical applications improve the biotechnological properties of S. cerevisiae yeast, race 34/70, contributing to the intensification of the processes of fermentation and improve the quality of finished beveragein the brewing culture, as well as other sectors of the food industry.