[Dependence of the shape of variable electric potential on plant constant electric field]

It is known that tissues, organs and organisms are characterized by electric polarity. There are many hypotheses as to their origin and the role of polarity in vital activity. However the final solution of these problems was not found. We have shown that the potential difference (DEP) measured along the plant surface (extracellular potentials) is directly related to the membrane potential difference across the cells of symplast. The mechanism of the propagation of variable potential similar to the mechanism of the propagated action potential in the excitable tissue was considered earlier. The data concerning the influence of the constant electric field of the plant on the shape and amplitude of the variable potential are presented.