Cited by 34Microbial Metabolic Engineering and BioproductionFungal and yeast genetics researchBiofuel production and bioconversion

Growth characteristics of Saccharomyces cerevisiae S288C in changing environmental conditions: auxo-accelerostat study

Kasemets, Kaja, Nisamedtinov, Ildar, Laht, Tiiu-Maie, Abner, Kristo, Paalme, Toomas·2007·Antonie van Leeuwenhoek

Abstract

The effect of individual environmental conditions (pH, pO(2), temperature, salinity, concentration of ethanol, propanol, tryptone and yeast extract) on the specific growth rate as well as ethanol and glycerol production rate of Saccharomyces cerevisiae S288C was mapped during the fermentative growth in aerobic auxo-accelerostat cultures. The obtained steady-state values of the glycerol to ethanol formation ratio (0.1 mol mol(-1)) corresponding to those predicted from the stoichiometric model of fermentative yeast growth showed that the complete repression of respiration was obtained in auxostat culture and that the model is suitable for calculation of Y(ATP) and Q(ATP) values for the aerobic fermentative growth. Smooth decrease in the culture pH and dissolved oxygen concentration (pO2) down to the critical values of 2.3 and 0.8%, respectively, resulted in decrease in growth yield (Y(ATP)) and specific growth rate, however the specific ATP production rate (Q(ATP)) stayed almost constant. Increase in the concentration of biomass (>0.8 g dwt l(-1)), propanol (>2 g l(-1)) or NaCl (>15 g l(-1)) lead at first to the decrease in the specific growth rate and Q(ATP), while Y(ATP) was affected only at higher concentrations. The observed decrease in Q(ATP) was caused by indirect rather than direct inhibition of glycolysis. The increase in tryptone concentration resulted in an increase in the specific growth rate from 0.44 to 0.62 h(-1) and Y(ATP) from 12.5 to 18.5 mol ATP g dwt(-1). This study demonstrates that the auxo-accelerostat method, besides being an efficient tool for obtaining the culture characteristics, provides also decent conditions for the experiments elucidating the control mechanisms of cell growth.

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Crossref · 10.1007/s10482-007-9141-y

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Authors
Kasemets, K., Nisamedtinov, I., Laht, T.-M., Abner, K., & Paalme, T.
Affiliations
  • National Institute of Chemical Physics and Biophysics (EE)
  • Tallinn University of Technology (EE)
Corresponding author
Paalme, Toomas
Venue
Antonie van Leeuwenhoek
Published
2007-02-01
Volume
92
Issue
1
Pages
109-128
ISSN
  • 0003-6072 (ISSN-L)
  • 1572-9699
OpenAlex
W1982290228
Cited by
34
References
44
Citations by year
2026: 1 · 2025: 2 · 2024: 1 · 2023: 1 · 2022: 1 · 2021: 2 · 2019: 3 · 2018: 3 · 2017: 3 · 2016: 2 · 2015: 3 · 2014: 3 · 2013: 2 · 2012: 1
FWCI
0.79
Type
journal article
Language
en
Open access
closed
Locations
  • Antonie van Leeuwenhoek (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
Keywords
Saccharomyces cerevisiae S288c, specific growth rate, ethanol production, glycerol production, ATP yield, pH effect, dissolved oxygen, salinity, propanol, tryptone, yeast extract, glycolysis inhibition, fermentative growth, stoichiometric modeling
MeSH terms
Adenosine Triphosphate, Ethanol, 1-Propanol, Fermentation, Glycerol, Glycolysis, Hydrogen-Ion Concentration, Models, Biological, Oxygen, Saccharomyces cerevisiae, Sodium Chloride, Temperature

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