Evidence of a Positive Membrane Potential and a Calcium Accumulation in Euglena Gracilis Z Mitochondria by in vivo Microelectrode Studies

  • Christian Tamponnet
  • Jean-Pierre Rona
  • Jean-Nöel Barbotin
  • Régis Calvayrac


Recently, the biotechnological interest in plant cells has increased considerably and immobilization processes have emerged as an important tool for increasing their longevity (3). The immobilization of Euglena gracilis Z cells in a calcium alginate gel exhibited the conservation of their cellular structures and functions (10). To explain such a behaviour, the role of the high external Ca2+ concentration is suspected. So, the ionic concentrations and mitochondrial membrane potential differences have been measured.


Electrochemical Potential Ionic Probe Euglena Gracilis Biotechnological Interest Giant Mitochondrion 
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Copyright information

© Springer Science+Business Media New York 1987

Authors and Affiliations

  • Christian Tamponnet
    • 1
    • 2
  • Jean-Pierre Rona
    • 3
  • Jean-Nöel Barbotin
    • 1
  • Régis Calvayrac
    • 2
  1. 1.Lab. de Technologie Enzymatique, UA CNRS 523Université de Technologie de CompiègneCompiègneFrance
  2. 2.Lab. des Membranes Biologiques, Tour 54–53,2°étageUniversité Paris VIIParis Cedex 05France
  3. 3.Lab. d’Electrophysiologie des Membranes, UA CNRS 1180 Tour 54–64, 4°étageUniversité Paris VIIParis Cedex 05France

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