RAPID GROWTH INHIBITION OF GHERKIN HYPOCOTYLS IN BLUE LIGHT1

Abstract

The elongation of dark-grown gherkin hypocotyls has been recorded continuously in darkness and on exposure to blue, red or far-red light. Evidence was obtained that the inhibition of elongation in blue light is not mediated by the phytochrome and “high energy reactions” but that a specific blue-light absorbing pigment is involved.