Carotenoid synthesis in mustard seedlings as controlled by phytochrome and inhibitors.

摘要: Accumulation of carotenoids in the mustard seedling (Sinapis alba L.) is controlled by phytochrome (Pfr). Separation shows that control quantitative rather than qualitative. Kinetic studies indicate Pfr exerts a rapid and nearly reversible over rate carotenoid accumulation. Whereas accumulation between 36 60h after sowing relatively insensitive towards Actinomycin D, sensitivity cycloheximide Puromycin high. It concluded at least some enzymes required for biosynthesis are made extraplastidal cytoplasm it suggested acts level providing structural prerequisite plastid compartment. This latter suggestion mainly based on fact light dark very sensitive chloramphenicol if compound applied time sowing. If, however, h sowing, effect different dark. In there no influence up to 200 μg·ml-1, whereas significant inhibition