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Plant Physiology 55:946-947 (1975)
© 1975 American Society of Plant Biologists

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Articles

Intracellular Recordings from Phycomyces1

Philip M. Groves and R. Igor Gamow

a Departments of Psychology and Aerospace Engineering Sciences, University of Colorado, Boulder, Colorado 80302

Intracellular recordings from the giant sporangiophore of Phycomyces stage II were obtained. The mean transmembrane potential for 30 observations was –119.9 millivolts (negative inside), and it did not change either as a result of a light stimulus or during dark adaptation. Injected depolarizing and hyperpolarizing step currents and steady currents did not produce any avidence of spike activity. We conclude that light transduction and dark adaptation in Phycomyces are not based on alterations of the transmembrane potential.

1 This research was supported in part by Grant MH 19515 and Research Scientist Development Award K02 MH 70706 from the National Institute of Mental Health to P.M.G. and grants GB 31039 and GB 35597 from the National Science Foundation to R.I.G






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ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1975 by the American Society of Plant Biologists