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Updated: Aug 15, 2026

Saccharomyces cerevisiae Exponential Growth Kinetics in Batch Culture to Analyze Respiratory and Fermentative Metabolism
Published on: September 30, 2018
Influence of assimilable nitrogen on volatile acidity production by Saccharomyces cerevisiae during high sugar
Marina Bely1, Alessandra Rinaldi, Denis Dubourdieu
1Faculté d'Oenologie, Université Victor Segalen Bordeaux 2, 351 Cours de la Libération, 33405 Talence, France. marina.bely@univ-pau.fr
Abstract:
We analyzed the variability of volatile acidity and glycerol production by Saccharomyces cerevisiae on a large sample of high sugar musts. The production of volatile acidity was inversely correlated with the maximum cell population and the assimilable nitrogen concentration. The higher the nitrogen concentration, the less volatile acidity was produced. An approach to minimize volatile acidity production during high sugar fermentations by adjustment of assimilable nitrogen in musts was investigated in terms of both quantity and addition time. It was found that the optimal nitrogen concentration in the must is 190 mgN.l(-1). The best moment for nitrogen addition was at the beginning of fermentation. Addition at the end of the growth phase had less effect on volatile acidity reduction. We suggest that by stimulating cell growth, nitrogen addition provides NADH in the redox-equilibrating process, which in turn reduces volatile acidity formation.
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