Investigation of membrane potential changes in Nitellopsis obtusa cells induced by blue and red light stimulation

Abstract

Light controls multiple physiological processes in plants. Membrane potential is widely used to report the early events as­sociated with changes in ion permeability, thus the effect of monochromatic light on bioelectrical parameters of Nitellopsis ob­tusa cells was examined. In this study blue, red and far-red light-induced membrane potential changes, light-induced photoelectrical reaction and membrane excitability were investigated using K’-anaesthesia method. All investigated lights cause the same bioelectrical events in Nitellopsis obtusa cells. It can be concluded that all photoreception systems exert their effects by first altering the permeability of the plasma membrane to ions and later ion channels perform signal-transducing functions in the complex array of mechanisms that determine plant physiology.