Continuous culture study of transient behaviour of Saccharomyces cerevisiae growing on sucrose and fructose |
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Affiliation: | 1. Department of Obstetrics and Gynaecology, University of British Columbia, and the Children’s and Women’s Hospital and Health Centre of British Columbia, Vancouver BC;2. Department of Obstetrics and Gynaecology, College of Medicine, King Saud University, Riyadh, Saudi Arabia;3. School of Population and Public Health, University of British Columbia, Vancouver BC;1. enotecUPM, Food Technology Department, Technical College of Agronomic Engineers, Technical University of Madrid, Avenida Complutense S/N, 28040 Madrid, Spain;2. Dipartimento di Scienze degli Alimenti, Università degli Studi di Udine, Via Sondrio, 2/A, 33100 Udine, Italy |
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Abstract: | During fully aerobic continuous growth of Saccharomyces cerevisiae on fructose- and sucrose-limited cultures, there exists the possibility of a number of distinct steady states at higher dilution rates. It is thus postulated that a number of discrete “states” exist for yeast cells under constant environmental conditions and that the particular “state” obtained is a function of the time spent under these conditions (adaptation) and the manner in which the steady state was approached. These observations are significant since they provide an insight into the large range of responses possible by yeasts in continuous cultures and may help to explain why unified views of sugar utilisation by yeasts have been so elusive. |
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