Carotenoid Metabolism

Carotenoid metabolism refers to the biochemical pathways through which cannabis plants synthesize and accumulate carotenoids—pigments responsible for yellow, orange, and red hues in flowers and leaves. These compounds include β-carotene, lycopene, and xanthophyll, which are produced during photosynthesis and often become more visible as chlorophyll degrades during late flowering. Carotenoid expression is influenced by genetics, light exposure, temperature, and nutrient availability, making it a visible marker of plant health and phenotypic variation. Breeders observing rich autumn colors or golden hues in buds are often selecting for genetic predisposition toward robust carotenoid synthesis. Understanding carotenoid metabolism helps contextualize the full spectrum of plant pigmentation within cannabis breeding programs.

Breeders use carotenoid pigmentation as a visual phenotypic marker for selecting stable lines with consistent coloration. Carotenoid-rich genetics are often crossed to enhance aesthetic traits and to study how secondary metabolism stability correlates with other desirable characteristics in cultivation.