[Relation between light-induced intracellular and extracellular bioelectric reactions of plants]

The parallel registration of light-induced changes of electrical potential of the water plant Elodea has been made with the help of intracellular-microelectrode and extracellular-contact methods. It has been shown that the curve of the light-induced bioelectrical reaction (LBR) under the extracellular registration was similar to the curve of the first differential of light-induced changes of intracellular electrical potential (LIP), but with a negative sign. Thus, the kind of changing of LBR, as the first differential of LIP, may give information about intracellular potential of ground plants, for which the microelectrode way of registration was impossible. The likeness between LBR of Elodea and the ground plants studied suggests the general regularities in the light-induced changes of electrical potentials of different plants.