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Please use this identifier to cite or link to this item: http://hdl.handle.net/10373/397

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Title: Physiological responses of Crabtree positive and Crabtree negative yeasts to glucose upshifts in a chemostat
Authors: Wardrop, F. R.
Liti, G.
Cardinali, G.
Walker, Graeme M.
Affiliation: University of Abertay Dundee. School of Contemporary Sciences.
Keywords: Crabtree effect
Respiration
Fermentation
Saccharomyces cerevisiae
Kluyveromyces marxianus
Issue Date: 2004
Publisher: Univ. of Milan Department of Food Science and Microbiology
Type: Journal Article
Refereed: peer-reviewed
Rights: Published version (c)Univ. of Milan Department of Food Science and Microbiology, available at http://www.annmicro.unimi.it/full/54/wardrop_54_103.pdf.
Citation: Wardrop, F.R., et al. 2004. Physiological responses of Crabtree positive and Crabtree negative yeasts to glucose upshifts in a chemostat. Annals of Microbiology. 54(1): pp.103-114. Available at: http://www.annmicro.unimi.it/full/54/wardrop_54_103.pdf
Abstract: Growth and metabolic differences between a Crabtree positive yeast, Saccharomyces cerevisiae, and a Crabtree negative yeast, Kluyveromyces marxianus, were investigated using chemostat cultures under glucose limitation. When subjected to glucose upshifts ("pulses" or sudden increases in glucose availability), several physiological differences between these two yeasts became apparent. Whilst the production Of ethanol was very rapid in S. cerevisiae, there was a complete lack of alcoholic fermentation in K. marxianus. Glucose utilisation kinetics also differed, with S. cerevisiae rapidly consuming 50% of the additional available glucose (through fermentation) whilst K. marxianus was only utilised 10% of the glucose (through respiration). These and other differences suggest possible evolutionary advantages of the Crabtree effect in the metabolism of sugar rich environments by certain yeasts.
URI: http://hdl.handle.net/10373/397
ISSN: 1590-4261
Appears in Collections:Science Engineering & Technology Collection

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