Geoelectric Effect and Geotropic Curvature

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Science  21 May 1965:
Vol. 148, Issue 3673, pp. 1100-1101
DOI: 10.1126/science.148.3673.1100


A transverse electrical potential develops in many plant organs after they are reoriented from a vertical to a horizontal position. This phenomenon has been the basis for both a geoelectric hypothesis of geotropic curvature and its subsequent refutation. In both arguments a causal relation between the potential and curvature has been assumed. Curvature occurs in the absence of potential, as well as vice versa; it is concluded that both the hypothesis and its refutation are incorrect.