Abstract
Alteration of the electrical polarity in sections of maize (Zeamays L. cv. Odesskaya‐80) coleoptiles and pea (Pisum sativum L. cv. Cubanecz) internodes by passing a weak electric current longitudinally (6 μA, anode placed at the apical end of the section) increased their elongation rate 2–3 fold with a lag period of 2.5 min. Inhibitors of polar auxin transport, e.g. N‐1‐naphthylphtalamic and 2,3,5‐triiodobenzoic acids and also ethylene glycol‐bis(β‐aminoethylether)‐N,N,N'N'‐tetraacetic acid (EGTA), a chelator of divalent cations, decreased the growth rate of the sections and inhibited the growth‐stimulating effect of the electric current. The observed acceleration of growth of axial plant organs under the action of a weak electric current is suggested to be connected with changes in the mode of action of the basipetal auxin transport system.
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