Photoregulation of Anthocyanin Synthesis X. Dependence on Photosynthesis of High Irradiance Response Anthocyanin Synthesis in Brassica oleracea Leaf Disks and Spirodela polyrrhiza

The most effective spectral regions for anthocyanin productionin cabbage leaf disks and Spirodela are the red, blue and ultravioletA, with action in the far red (FR) minimal or nil. Phytochromeis involved in the photoregulation of anthocyanin productionin these two systems. The expression of the response dependsupon photosynthetic activity. Comparison with data from othersystems suggests that a spectral sensitivity with high efficiencyof red and blue and low or nil efficiency of FR might be a commonfeature of anthocyanin production in systems with a low phytochromecontent and dependent on photosynthetic activity for the expressionof the response. (Received January 6, 1984; Accepted June 30, 1984)