Yeast strain having improved capability for fermenting xylose in the presence of acetic acid

The invention relates to a method for selecting a yeast strain having improved capability for fermenting a pentose, advantageously xylose, in the presence of organic acid, advantageously acetic acid, in non-dissociated form, in which at least one yeast strain that is capable of fermenting said pento...

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Bibliographic Details
Main Authors Pignede, Georges, Bavouzet, Jean-Michel, Techel, Jennifer, Desfougeres, Thomas
Format Patent
LanguageEnglish
Published 21.10.2021
Subjects
BEER
BIOCHEMISTRY
CHEMISTRY
COMPOSITIONS THEREOF
CULTURE MEDIA
ENZYMOLOGY
FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE
METALLURGY
MICROBIOLOGY
MICROORGANISMS OR ENZYMES
MUTATION OR GENETIC ENGINEERING
PROCESSES USING MICROORGANISMS
PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS
SPIRITS
VINEGAR
WINE
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Summary:The invention relates to a method for selecting a yeast strain having improved capability for fermenting a pentose, advantageously xylose, in the presence of organic acid, advantageously acetic acid, in non-dissociated form, in which at least one yeast strain that is capable of fermenting said pentose is consecutively cultured in the following two media: a first growth medium comprising said pentose as the only carbon source and said organic acid in non-dissociated form; a second growth medium comprising another carbon source as the only carbon source, advantageously glucose, free of said organic acid in non-dissociated form, the consecutive culture in at least said two growth media being repeated at least twice, in the presence of rising concentrations of organic acid in non-dissociated form.
Bibliography:Application Number: AU20160256626