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Debaryomyces hansenii growth in nonsterile seawater ClO2 - peptone-containing medium

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Abstract:

We found that the marine yeast Debaryomyces hansenii strain C-11 (CIBNOR yeast collection, La Paz, México) is highly tolerant to chlorine dioxide (ClO2), a powerful biocide agent. A direct application of this observation is the fermentation of the yeast in a nonsterile medium with an initial concentration of 0.3 mg/L of ClO2. The disinfectant helps to avoid the growth of unwanted microorganisms while allowing the development of the yeast. Because the concentration of ClO2 decreases during the fermentation, we ascribe to D. hansenii cells a "biocontrol" action that contributes to the collection of a contaminant-free yeast cell biomass.Key words: marine yeasts, Debaryomyces hansenii, biocide, biocontrol, Cl02 disinfection, Cl02 resistance, nonsterile medium.

Nous avons découvert que la levure marine Debaryomyces hansenii souche C-11 (CIBNOR « yeast collection », La Paz, le Mexique) est fortement tolérante au dioxyde de chlore (ClO2), un puissant agent biocide. Une application directe de cette observation est la fermentation de la levure dans un milieu non stérile avec une concentration initiale de 0,3 mg/L de ClO2. Le désinfectant aide à éviter la croissance de micro-organismes indésirables tout en permettant le développement de la levure. Puisque la concentration de ClO2 diminue au cours de la fermentation, nous attribuons à D. hansenii une action de « biocontrôle » qui contribue à la collecte d'une biomasse de levure dépourvue de contaminants.Mots clés : levure marine, Debaryomyces hansenii, biocide, biocontrôle, désinfectant C102, tolérante C102, milieu nonstérile.[Traduit par la Rédaction]

Keywords: Cl02 disinfection; Cl02 resistance; Debaryomyces hansenii; biocide; biocontrol; biocontrôle; désinfectant C102; levure marine; marine yeasts; milieu nonstérile; nonsterile medium; tolérante C102

Document Type: Research Article

Publication date: July 1, 2001

More about this publication?
  • Published since 1954, this monthly journal contains new research in the field of microbiology including applied microbiology and biotechnology; microbial structure and function; fungi and other eucaryotic protists; infection and immunity; microbial ecology; physiology, metabolism and enzymology; and virology, genetics, and molecular biology. It also publishes review articles and notes on an occasional basis, contributed by recognized scientists worldwide.
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