A red-light-dependent compound in Pisum sativum

Red light treatment of etiolated plants induces remarkable morphological changes. About the biochemical pathways leading to these effects little is known as yet. It seems logical, however, to suppose a relationship between changes induced in the chemical composition of the plant directly after red light treatment and the morphological changes found later on. Thus, in pea plants the red-light-dependent compound quercetin-3-p-coumaroyltriglucoside has been suggested to be a possible growth mediator by an effect on indoleacetic acid oxidase (Bottomly c.s. 1966). From my work on the biochemical aspects of red light treatment of 7-day old pea plants another red-light-dependent compound emerged.