Folia Microbiologica

, Volume 37, Issue 1, pp 39–42 | Cite as

H+ and K+ fluxes and attendant processes inCandida utilis induced by inhibitory ethanol concentration

  • A. Prell
  • J. Páca
  • K. Sigler


In oxygen-aerated non-growing cells a subinhibitory ethanol concentration (1 g/L) causes an H+/K+ exchange. An inhibitory ethanol concentration (30 g/L) slows down acidification but has no effect on its extent. The transmembrane ΔpH depends directly on the ethanol level in the medium and is not lowered at high ethanol concentrations. Changes in membrane potential induced by ethanol are also concentration dependent. The high ethanol level does not increase the passive permeability of cell membrane to H+.


Membrane Potential Ethanol Concentration High Ethanol Concentration Candida Utilis Ethanol Level 
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Copyright information

© Folia Microbiologica 1992

Authors and Affiliations

  • A. Prell
    • 1
  • J. Páca
    • 2
  • K. Sigler
    • 1
  1. 1.Institute of MicrobiologyCzechoslovak Academy of SciencesPrague 4
  2. 2.Institute of Chemical TechnologyPrague 6Czechoslovakia

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