title: Kinetics of the light-induced georeactivity of maize roots.
abstract: Apical root segments of Zea mays L. cv. Orla 264 undergo some geotropic curvature in complete darkness but the curvature increases considerably if prior to geostimulation the segments are given a light pretreatment. If the light treatment is follwed by a dark treatment before the root is geostimulated the light-induced response is not changed by dark periods up to 2 h but declines with longer ones, and disappears completely after 5 h of darkness.
authors: Institute of Plant Biology and Physiology of the University, Place de la Riponne 6, CH-1005, Lausanne, Switzerland.
authors: P E
authors: PE
authors: Pilet