Physiological evaluation of yeast strains under anaerobic conditions using glucose, fructose, or sucrose as the carbon source.

Autor: Andrade Silva CA; Center for Studies in Natural Resources, State University of Mato Grosso do Sul, Dourados, MS, Brazil; Laboratory of Bioengineering, Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil., Oka ML; Laboratory of Bioengineering, Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil., da Silva PGP; Laboratory of Bioengineering, Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil., Honma JM; Laboratory of Bioengineering, Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil., Leite RSR; Laboratory of Enzymology and Fermentation Processes, Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil., Fonseca GG; Faculty of Natural Resource Sciences, School of Health, Business and Science, University of Akureyri, Akureyri, Iceland. Electronic address: gustavo@unak.is.
Jazyk: angličtina
Zdroj: Journal of bioscience and bioengineering [J Biosci Bioeng] 2024 Jun; Vol. 137 (6), pp. 420-428. Date of Electronic Publication: 2024 Mar 16.
DOI: 10.1016/j.jbiosc.2024.02.003
Abstrakt: The aim of this study was to evaluate the physiology of 13 yeast strains by assessing their kinetic parameters under anaerobic conditions. They included Saccharomyces cerevisiae CAT-1 and 12 isolated yeasts from different regions in Brazil. The study aimed to enhance understanding of the metabolism of these strains for more effective applications. Measurements included quantification of sugars, ethanol, glycerol, and organic acids. Various kinetic parameters were analyzed, such as specific substrate utilization rate (q S ), maximum specific growth rate (μ max ), doubling time, biomass yield, product yield, maximum cell concentration, ethanol productivity (P Eth ), biomass productivity, and CO 2 concentration. S. cerevisiae CAT-1 exhibited the highest values in glucose for μ max (0.35 h -1 ), q S (3.06 h -1 ), and P Eth (0.69 gEth L -1 h -1 ). Candida parapsilosis Recol 37 did not fully consume the substrate. In fructose, S. cerevisiae CAT-1 stood out with higher values for μ max (0.25 h -1 ), q S (2.24 h -1 ), and P Eth (0.60 gEth L -1 h -1 ). Meyerozyma guilliermondii Recol 09 and C. parapsilosis Recol 37 had prolonged fermentation times and residual substrate. In sucrose, only S. cerevisiae CAT-1, S. cerevisiae BB9, and Pichia kudriavzevii Recol 39 consumed all the substrate, displaying higher P Eth (0.72, 0.51, and 0.44 gEth L -1 h -1 , respectively) compared to other carbon sources.
(Copyright © 2024 The Society for Biotechnology, Japan. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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