, Volume 29, Issue 12, pp 1489–1490 | Cite as

Réversibilité de la réponse du potentiel de membrane chezNitella flexilis L. à des variations de pH

  • J. Lefebvre
  • C. Gillet


The better the recovering of the membrane potential ofNitella on restoring the initial value of the external pH after a change, the more acid is the pH of the medium (Table I). On the other hand, a better repeatability was observed in alkaline solutions (Table II) for a change in the external K+ concentration. These results are interpreted as a manifestation of the binding of K+ ions to ionizable fixed charges (pK about 5–6) at the membrane surface and of the control of molecular structure of the membrane by the pH.


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Copyright information

© Birkhäuser Verlag 1973

Authors and Affiliations

  • J. Lefebvre
    • 1
  • C. Gillet
    • 1
  1. 1.Département de Biologie végétaleFacultés UniversitairesNamurBelgique

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