Spt20 plays a role in growth and aging under winemaking conditions.

<p><b>A)</b> Growth curves for wine strain L2056 and its derivatives <i>spt20</i>Δ and <i>ubp8</i>Δ showing the number of viable cells (cfu/mL) determined by plate counting at different times during winemaking in natural grape juice. Experiments were performed at least in triplicate, and errors bars show the standard deviation (SD). <b>B)</b> Survival curves for the same strains. The cell numbers at day 3 in panel A were taken as 100% viability. <b>C)</b> Sugar consumption profiles during fermentation. <b>D)</b> Ethanol production at the end of grape juice fermentation. Ethanol was measured when sugars were completely consumed (below 2 g/l).