Related Experiment Video
Updated: Aug 8, 2026

Light Sheet Fluorescence Microscopy of Plant Roots Growing on the Surface of a Gel
Published on: January 18, 2017
Function of Light in the Light-induced Geotropic Response in Zea Roots
1Institute of Biological Sciences, University of Tsukuba, Sakura-mura, Ibaraki 305, Japan.
Abstract:
The light doses just above the threshold energy value for inducing the geotropic responsiveness in the roots of Zea mays L., cv. Golden Cross Bantam 70, caused a drastic rise in the NADPH level and a drop in the NADP level in 2-millimeter root tips. Some reducing agents lowered the threshold energy value up to about one-third of the control. From these results, we deduce that light may exert two functions in the geotropic response of Zea primary roots, one being the photochemical transformation of a photoreceptor and the other being the induction of a reduction state in the tissue.
Related Concept Videos
Photoreceptors and Plant Responses to Light
Cell Signaling in Plants
Responses to Gravity and Touch
Channel Rhodopsins
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
Plant Hormones
Biological Clocks and Seasonal Responses

