Abstract
Pulvinar motor cells ofPhaseolus vulgaris L display transient depolarization of the membrane potential and a turgor pressure decrease when exposed to a pulse of blue light. To analyze the mechanism of the transient depolarization, the effects of some factors such as anoxia, metabolic inhibitors and specific inhibitors of H+-ATPase have been examined. The findings have led to the conclusion that blue light inactivates the electrogenic H+-pumping ATPase in the plasma membrane of the motor cells. This inactivation seems to suppress ion uptake and decrease the turgor pressure of the motor cells.
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Abbreviations
- BL:
-
blue light (461 nm)
- RL:
-
red light (680 nm)
- CCCP:
-
carbonyl cyanidem-chlorophenylhydrazone
- DCCD:
-
dicyclohexylcarbodiimide
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Nishizaki, Y. Effects of blue light on electrical potential and turgor in pulvinar motor cells ofPhaseolus . J. Plant Res. 109, 93–97 (1996). https://doi.org/10.1007/BF02344293
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DOI: https://doi.org/10.1007/BF02344293