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THE INFLUENCE OF MEDIA CONDITIONS ON THE UTILISATION OF MONOSACCHARIDES BY A STRAIN OF SACCHAROMYCES UVARUM (CARLSBERGENSIS )
Author(s) -
Panchal Chandra J.,
Stewart Graham G.
Publication year - 1982
Publication title -
journal of the institute of brewing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 51
eISSN - 2050-0416
pISSN - 0046-9750
DOI - 10.1002/j.2050-0416.1982.tb04077.x
Subject(s) - fructose , sucrose , yeast , monosaccharide , sugar , saccharomyces , chemistry , hydrolysis , biochemistry , brewing , food science , substrate (aquarium) , saccharomyces cerevisiae , biology , fermentation , ecology
The utilisation of glucose and fructose by the brewing yeast species Saccharomyces uvarum (carlsbergensis ) was investigated. When sucrose was used as the substrate, one of the hydrolysis products, glucose was taken up preferentially over the other hydrolysis product fructose. However, when glucose and fructose were added separately to the media, the uptake profile for each sugar was very similar. Growth promoting media enhanced the differential uptake, whereas non‐growth promoting media reduced it. Increase in osmotic pressure of the medium eliminated the preferential uptake of glucose over fructose. The results suggest the presence of a complex uptake system and could be explained by a combination of (1) molecular configuration of the sugars in aqueous solutions, (2) differential phosphorylation effect of glucose and fructose and (3) intracellular accumulation of ethanol in yeast.