2003
DOI: 10.1128/aem.69.1.113-121.2003
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Abstract: The anaerobic growth of the yeast Saccharomyces cerevisiae normally requires the addition of molecular oxygen, which is used to synthesize sterols and unsaturated fatty acids (UFAs). A single oxygen pulse can stimulate enological fermentation, but the biochemical pathways involved in this phenomenon remain to be elucidated. We showed that the addition of oxygen (0.3 to 1.5 mg/g [dry mass] of yeast) to a lipid-depleted medium mainly resulted in the synthesis of the sterols and UFAs required for cell growth. How… Show more

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Cited by 110 publications
(79 citation statements)
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“…Moreover, in winemaking, a strong decrease of the velocity during the fermentation, could lead to sluggish or a stuck fermentation. As this constitutes a serious problem in winemaking, many studies have examined the reasons for this 12,20,21 and the depletion of oxygen during growth has been raised as one of the main reasons for the decrease in yeast viability. The yeast instead of producing endogenous ergosterol, must use phytosterols to build their membranes, which are then weakened, and cannot ensure alcohol resistance for the cell.…”
Section: Resultsmentioning
confidence: 99%
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“…Moreover, in winemaking, a strong decrease of the velocity during the fermentation, could lead to sluggish or a stuck fermentation. As this constitutes a serious problem in winemaking, many studies have examined the reasons for this 12,20,21 and the depletion of oxygen during growth has been raised as one of the main reasons for the decrease in yeast viability. The yeast instead of producing endogenous ergosterol, must use phytosterols to build their membranes, which are then weakened, and cannot ensure alcohol resistance for the cell.…”
Section: Resultsmentioning
confidence: 99%
“…This result might have been due to oxygenation of the cider during the operation, rather than by a direct effect of the operation. It has been shown that an introduction of a small amount of oxygen improves cell viability and helps the yeast to maintain their fermentative capacity 12,20 . Nitrogen consumption.…”
Section: Effect Of a Decimal Biomass Reduction By Filtrationmentioning
confidence: 99%
“…81,165 In lipid-depleted media, it was further shown that 30-100% of the oxygen required for fermentative growth under brewing and enological conditions accounted for concomitant UFA and sterol synthesis. 99,100,145,146,169 Interestingly, the anaerobic cells in lipid-depleted synthetic musts exhibit the highest CNR capacity 168,169 (also, Rosenfeld et al, unpublished data). In contrast, in synthetic musts containing excess oleate and ergosterol (both classically added to allow anaerobic growth), the impairment of the desaturase activity (i.e.…”
Section: Characterization and Physiological Roles Of So-called 'Cyanimentioning
confidence: 99%
“…It may represent from 0.1 to a few percent of the overall oxygen consumption. 42,168,169,205,213 Electron leakage from the reduced ubiquinone pool to produce ROS may partially explain such oxygen fluxes. 25 However, in view of the properties of myxothiazol, which blocks ubiquinone auto-oxidation at the bc1 level, 207 this hypothesis seems unlikely, since no difference could be detected between antimycin Aand myxothiazol-resistant oxygen fluxes in either whole cells or isolated mitochondria.…”
Section: Respiratory Oxygen Fluxesmentioning
confidence: 99%
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