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Differential malic acid degradation by selected strains of Saccharomyces during alcoholic fermentation (CROSBI ID 491411)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija

Redžepović, Sulejman ; Orlić, Sandi ; Majdak, Ana ; Kozina, Bernard ; Volschenk, Heinrich ; Viljoen-Bloom, Miranda Differential malic acid degradation by selected strains of Saccharomyces during alcoholic fermentation. 2003

Podaci o odgovornosti

Redžepović, Sulejman ; Orlić, Sandi ; Majdak, Ana ; Kozina, Bernard ; Volschenk, Heinrich ; Viljoen-Bloom, Miranda

engleski

Differential malic acid degradation by selected strains of Saccharomyces during alcoholic fermentation

To produce a high quality wine, it is important to obtain a fine balance between the various chemical constituents, especially between the sugar and acid content. The latter is more difficult to achieve in wines that have a high acidity due to excess malic acid, since wine yeast in general cannot effectively degrade malic acid during alcoholic fermentation. An indigenous Saccharomyces paradoxus strain RO88 was able to degrade 38% of the malic acid in Chardonnay must and produced a wine of good quality. In comparison, Schizosaccharomyces pombe strain F effectively removed 90% of the malic acid, but did not produce a good quality wine. Although commercially promoted as a malic acid degrading wine yeast strain, only 18% of the malic acid was degraded by Saccharomyces cerevisiae Lalvin strain 71B. Preliminary studies on the transcriptional regulation of the malic enzyme gene from three Saccharomyces strains, i.e. S. paradoxus RO88, S. cerevisiae 71B and Saccharomyces bayanus EC1118, were undertaken to elucidate the differences in their ability to degrade malic acid. Expression of the malic enzyme gene from S. paradoxus RO88 and S. cerevisiae 71B increased towards the end of fermentation once glucose was depleted, whereas no increase in transcription was observed for Saccharomyces bayanus EC1118 which was also unable to effectively degrade malic acid.

Saccharomyces; malic acid

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Podaci o prilogu

2003.

objavljeno

Podaci o matičnoj publikaciji

Podaci o skupu

ISSY 2003

poster

25.08.2003-29.08.2003

Budimpešta, Mađarska

Povezanost rada

Poljoprivreda (agronomija)