Allagochrome II. Effects of Light and Substrate on Allagochrome and Chlorogenic Acid Levels of Incubated Sunflower Leaf Discs

Publisher Website
Google Scholar
Abstract
Sunflower leaf discs incubated in the light on carbohydrate substrates exhibit several-fold increases in amounts of extractable allagochrome and chlorogenic acid. These changes are linear with time, and oxygen is required. The light effect saturates at approximately 600 μW/cm2 “white” light, roughly the compensation point for photosynthesis. Red light is as effective as white light. Incubation in the dark, or in far red light, produces negligible changes in allagochrome and chlorogenic acid content.