Photosensitive Signal Transduction Induces Membrane Hyperpolarization in Paramecium bursaria From: Photochemistry and Photobiology | Date: November 1, 2005| Author: Nakaoka, Yasuo; Mitarai, Atsushi | Copyright American Society for Photobiology Nov/Dec 2005. Provided by ProQuest LLC.Copyright information

ABSTRACT

The protozoan ciliate Paramecium bursaria exhibits membrane hyperpolarization in response to photostimulation, accompanied with an increased swimming speed. The external addition of cyclic nucleotide phosphodiesterase (PDE) inhibitors, either theophylline (1,3-dimethylxanthine) or 3-isobutyl-1-methylxanthin (IBMX), increased in both amplitudes of the membrane hyperpolarization and the increase in swimming speed. Moreover, the addition of membrane permeable cyclic nucleotide an...

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