Carotenoid Pigmentation

Carotenoid pigmentation refers to the orange, yellow, and red hues produced by carotenoid compounds in cannabis plant tissues, particularly visible in flowers, leaves, and sometimes pistils. These pigments are secondary metabolites distinct from chlorophyll and anthocyanins, and their expression is influenced by genetics, temperature, light exposure, and nutrient availability during flowering. Carotenoids themselves are not aromatic compounds—they contribute visual classification rather than scent—but plants displaying strong carotenoid pigmentation often co-express terpene profiles including limonene, pinene, or myrcene. Breeders and cultivators monitor carotenoid expression as a marker of phenotypic stability and environmental adaptation. Documentation of carotenoid-dominant phenotypes appears frequently in lineage records, particularly among heirloom and landrace-derived cultivars.

Breeders working with carotenoid expression use visual pigmentation as a phenotypic marker for selective breeding programs, as consistent coloration can indicate stable genetic expression under controlled conditions. Carotenoid intensity is often paired with terpene profiling to develop cultivar families with predictable secondary metabolite profiles.