Institute of Biological Sciences, University of Tsukuba, Sakura-mura, Ibaraki 305, Japan.
Plant Physiol. 1981 Feb;67(2):225-8. doi: 10.1104/pp.67.2.225.
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.
在诱导玉米根向地性反应的阈能值以上的光剂量会导致 2 毫米根尖的 NADPH 水平急剧上升和 NADP 水平下降。一些还原剂将阈能值降低到对照值的约三分之一。从这些结果中,我们推断出光可能在玉米初生根的向地性反应中发挥两种功能,一种是光受体的光化学转化,另一种是组织中还原态的诱导。