The effect of short-term irradiation on kinetin-induced amaranthin synthesis in amaranthus tricolor seedlings

The accumulation of amaranthin in kinetin-treated seedlings of Amaranthus tricolor is significantly increased following exposure to light. This enhancement, which appears to be phytochrome-controlled since it is saturated at low energy levels of irradiation and is far-red reversible, involves the synthesis of enzymes which mediate the effect of light on pigment formation. However, this does not depend on the direct intervention of photo-activated phytochrome at the DNA level.