Abstract
In 248 strains representing 205 yeast species, changes in pH coupled to glucose addition were followed in unbuffered cell suspensions. Alkalinization of the external medium elicited by glucose, indicating a H+-glucose symport was observed in 34% of the strains, most of them belonging to the genera Rhodotorula, Hansenula and Candida. H+ uptake coupled to glucose transport was observed only after exhaustion of glucose in growth media. This observation was taken as an indication that, in general, the synthesis of H+-glucose symport is under the control of catabolite repression. Subsequently to the addition of glucose, in most yeasts (82%) acidification was observed. This ability is probably related to the creation of a proton-gradient across the plasma membrane and is generally distributed among yeasts.
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Loureiro-Dias, M.C. Movements of protons coupled to glucose transport in yeasts. A comparative study among 248 yeast strains. Antonie van Leeuwenhoek 54, 331–343 (1988). https://doi.org/10.1007/BF00393524
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DOI: https://doi.org/10.1007/BF00393524