Influence of magnesium concentration on growth,ethanol and xylitol production by Pichia stipitis NRRL Y-7124 |
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| Authors: | Gustavo F. Mahler Daniel V. Guebel |
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| Affiliation: | (1) Cátedra de Microbiologia Industrial y Biotecnología, Facultad de Farmacia y Bioquimíca, Universidad de Buenos Aires, Junin 956, 1113 Capital Federal, Argentina |
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| Abstract: | Summary The effect of Mg+2 on Pichia stipitis growth and ethanol production was studied under condition of constant oxygen uptake rate (OUR) . Biomass/xylose and biomass/Mg+2 yields increased with Mg+2 concentration with a maximum value at Mg+2 4mM, ethanol being the main product obtained. At low Mg+2 levels (ImM) 49 % of carbon flux to ethanol was redirected to xylitol production, accomplished through NADH intracellular accumulation. |
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| Keywords: | Magnesium ethanol xylitol xylose OUR Pichia stipitis |
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