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Related Experiment Videos

[Selenium tolerance of yeasts].

V I Golubev1, N V Golubev

  • 1Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, pr. Nauki 5, Puschino, Moscow Oblast, 142290 Russia.

Mikrobiologiia
|September 25, 2002
PubMed
Summary

Yeast selenium tolerance varies significantly, with some species inhibited by low selenium levels and others thriving in high concentrations. Tolerance depends on yeast type and growth medium composition, particularly sulfur compounds.

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Area of Science:

  • Microbiology
  • Environmental Science

Context:

  • Yeast species exhibit a wide range of tolerance to selenium, a metalloid with potential toxicity.
  • Understanding this variation is crucial for applications involving selenium and yeast interactions.

Purpose:

  • To investigate and characterize the differential selenium tolerance among various yeast taxa.
  • To identify specific yeast species and genera with high or low selenium tolerance.
  • To explore the influence of growth medium components on yeast selenium tolerance.

Summary:

  • Yeast selenium tolerance varies greatly, from inhibition at 10(-4) M to growth at 10(-1) M.
  • Ascomycetous yeasts are generally more tolerant than basidiomycetous yeasts.
  • Specific species like Candida maltosa and Cryptococcus curvatus show high tolerance, while genera like Dekkera and Bullera show low tolerance.
  • Growth medium composition, especially sulfate, sulfur-containing amino acids, and glutamine, significantly affects selenium tolerance.

Impact:

  • Provides a basis for selecting appropriate yeast strains in selenium-related biotechnological processes.
  • Contributes to understanding microbial adaptation to metalloid stress.
  • Informs strategies for managing selenium in fermentation and environmental applications.

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