title: Function of Light in the Light-induced Geotropic Response in Zea Roots.
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.
authors: Institute of Biological Sciences, University of Tsukuba, Sakura-mura, Ibaraki 305, Japan.
authors: T
authors: T
authors: Suzuki
authors: M
authors: M
authors: Tanaka
authors: T
authors: T
authors: Fujii