Phytochrome-controlled ethylene biosynthesis of intact etiolated bean seedlings

摘要

Intact etiolated bean (Phaseolus vulgarisL. cv. Limburgse vroege) seedlings were illuminated with red light (10.5 W·m-2) for 10 min. After different time intervals ethylene production, and contents of 1-aminocyclopropane-1-carboxylic acid (ACC) and 1-(malonylamino)cyclopropane-1-carboxylic acid were measured. The red-light-induced decrease of ethylene production in 8-d-old intact etiolated bean seedlings was fast, strong and long-lasting ad was mediated through the phytochrome system. This effect appeared to be strictly age-dependent, as it could not be detected in plants younger than 6 d or older than 11 d