Pigmentation Carotenoid Expression

Carotenoid expression in cannabis refers to the biosynthesis and visible accumulation of carotenoid pigments—including beta-carotene, lycopene, and xanthophyll compounds—in plant tissues. These fat-soluble pigments are distinct from anthocyanins and chlorophyll, and their intensity is influenced by genetics, light spectrum, temperature stress, and nutrient availability during flowering. Carotenoid-dominant phenotypes often display yellow, orange, or golden hues in flowers and leaves. Lineage records frequently report carotenoid expression as a heritable trait across certain breeding lines, particularly in cultivars selected for visual stability. Understanding carotenoid biosynthesis pathways helps breeders predict and stabilize pigmentation outcomes across generations.

Breeders working in ornamental and commercial markets often select for stable carotenoid expression as a marker of genetic stability and shelf appeal. Documenting carotenoid phenotypes across controlled grows allows breeders to isolate and stabilize pigmentation traits without relying solely on environmental triggers.