Electrophysiology and Photomovement of Stentor

  • David C. Wood
Part of the NATO ASI Series book series (NSSA, volume 211)


As first reported by Jennings (1906) and Mast (1906) Stentor coeruleus swims away from light sources (photodispersal) and collects in the more shaded areas of an unevenly illuminated container. Stentor are sensitive to light because they contain a pigment called stentorin (Møller, 1962; Walker et al., 1979), which releases H+ ions as a result of light absorption (Walker et al., 1981). This rapid proton release is thought to be an initial step in a series of steps which eventuate in photodispersal (Song et al., 1983). This paper summarizes the available evidence describing some of these intervening processes and the physiological mechanisms producing them.


Receptor Potential Ciliary Membrane Intracellular Potential Ciliary Beating Paramecium Caudatum 
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Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • David C. Wood
    • 1
  1. 1.Department of Behavioral NeuroscienceUniversity of PittsburghPittsburghUSA

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