Diacetyl and acetoin production from the co-metabolism of citrate and xylose by Leuconostoc mesenteroides subsp. mesenteroides |
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Authors: | P Schmitt C Vasseur V Phalip D Q Huang C Diviès H Prévost |
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Institution: | (1) Laboratoire de Microbiologie, ENS.BANA, Université de Bourgogne, 1 Esplanade Erasme, F-21 000 Dijon, France Fax: +33 03 80 39 66 40 e.mail: hprevost@satie.u-bourgogne.fr, FR |
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Abstract: | The co-metabolism of citrate plus xylose by Leuconostoc mesenteroides subsp. mesenteroides results in a growth stimulation, an increase in d-lactate and acetate production and repression of ethanol production. This correlated well with the levels of key enzymes
involved. A partial repression of alcohol dehydrogenase and a marked stimulation of acetate kinase were observed. High citrate
bioconversion yields in diacetyl plus acetoin were obtained at pH 5.2 in batch (11.5%) or in chemostat (up to 17.4%) culture.
In contrast, no diacetyl or acetoin was detected in citrate plus glucose fermentation.
Received: 6 December 1996 / Received revision: 14 February 1997 / Accepted: 14 February 1997 |
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