Gaseous environments modify reserve carbohydrate contents and cell survival in the brewing yeast <Emphasis Type="Italic">Saccharomyces cerevisiae</Emphasis> |
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Authors: | Thu-Ha Pham Geneviève Mauvais Catherine Vergoignan Joëlle De Coninck Rémy Cachon Gilles Feron |
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Institution: | (1) Laboratoire de Génie des Procédés Microbiologiques et Alimentaires, UMR INRA/UB 1232, INRA, 17 rue Sully, BP 86510, 21065 Dijon, France;(2) UMR1129 FLAVIC, ENESAD, INRA, Université de Bourgogne, 17 rue Sully, BP 86510, 21065 Dijon, France |
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Abstract: | The use of H2, He and O2 during batch fermentation of Saccharomyces cerevisiae BRAS291 increased the final intracellular glycogen contents of the cells from 2-fold to 10-fold compared with a gas-free
condition, and this depended on the gas applied. Differently, the intracellular trehalose contents increased from 2-fold to
10-fold in reducing conditions compared with more oxidizing conditions. During storage at 4°C, the viability of cells cultivated
with gas was twice that of cells cultivated without gas. These results could be explained by the intracellular carbohydrate
contents as well as yeast ultrastructural modifications observed previously. |
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Keywords: | Gas Oxidoreduction potential Reserve carbohydrates Saccharomyces cerevisiae Yeast survival |
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