Adaptation to dim-red light leads to a nongradient pattern of stem elongation in cucumis seedlings.
Relative growth rate determinations on 5-millimeter regions of cucumber (Cucumis sativus L.) hypocotyls show that dim-red light-grown seedlings have an even distribution of growth along the stem axis. This contrasts with the apical to basal graded decline in growth rate seen in dark-grown seedlings, including dark-grown cucumber seedlings used as controls in this study. Dark-grown seedlings convert to the nongradient pattern when transferred to dim-red light. The small amount of light required suggests that the change in developmental pattern may happen in the natural light environment.
Shinkle
J R
JR
Department of Biology, Trinity University, San Antonio, Texas 78212-3195.
Sooudi
S K
SK
Jones
R L
RL