Study of physicochemical factors limiting the growth ofKluyveromyces marxianus |
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Authors: | D Vivier R Ratomahenina G Moulin P Galzy |
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Institution: | (1) Chaire de Microbiologie Industrielle et de Génétique des Microorganismes, INRA-ENSA 2, Place Viala, 34060 Montpellier, France |
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Abstract: | Summary The effects of various physicochemical parameters on the growth of twoKluyveromyces marxianus strains were investigated, including: pH values, sodium chloride, water activity in the medium and temperature. Both yeast strains were unaffected by pH changes. Optimal pH for growth was found to be 4 with both strains, but they were able to develop within the pH 3–8 range. Suitable growth was obtained at temperatures of 4–44°C and the optimal temperature for growth was 36°C for both strains. Modelling of this latter parameter is described. Growth of both microorganisms was considerably modified by increased NaCl or decreased water activity in the medium. |
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Keywords: | Kluyveromyces Growth rate Temperature Water activity pH |
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