Sulphate uptake and sulphite formation related to the methionine and/or cysteine content of grape must during the fermentation by strains of <i>Saccharomyces cerevisiae</i>
DOI:
https://doi.org/10.5073/vitis.1972.11.222-227Abstract
It has been demonstrated that normal and so-called SO2-forming yeasts differ considerably in sulphate absorption, i. e. SO2 forming strains consume on an average twice as much sulphate. The addition of increasing concentrations of methionine and/or cysteine to the grape must reduces the uptake of sulphate and the formation of sulphite with all strains during fermentation. Since cysteine c auses changes similar to methionine it is assumed that it also regulates the uptake and activation of sulphate.
Sulfataufnahme und Sulfitbildung in Beziehung zum Methionin- und/oder Cystein-Gehalt
von Traubenmost während der Vergärung durch einige Stämme von Saccharomyces
cerevisiae
Es konnte gezeigt werden, daß sich normale und sog. SO2-bildende Hefestämme hinsichtlich der Sulfatabsorption betrlichtlich unterscheiden, d. h. SO2-bildende Stämme verbrauchen durchschnittlich die doppelte Sulfatmenge. Die Zugabe steigender Konzentrationen von Methionin und/oder Cystein zu Traubenmost reduziert bei allen Stämmen die Aufnahme von Sulfat und die Bildung von Sulfit während der Gärung. Da Cystein ähnliche Veränderungen verursacht wie Methionin, wird angenommen, daß es ebenfalls die Aufnahme und Aktivierung von Sulfat regelt.
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