Carotenoid Pigmentation

Carotenoid pigmentation refers to the presence of carotenoid compounds—yellow, orange, and red pigments—in cannabis plant tissues, particularly visible in flowers, leaves, and trichomes. These pigments are secondary metabolites produced alongside chlorophyll and other plant compounds. Carotenoid expression is influenced by genetics, growing conditions (light, temperature, nutrient availability), and plant maturity. Plants with strong carotenoid pigmentation often display warm color tones ranging from pale yellow to deep copper or russet. Breeders working in this category have documented heritable carotenoid traits across various cultivar families, though expression remains phenotypically plastic and environmentally responsive. Carotenoids are also precursors to other aromatic compounds, making this classification relevant to terpene profiling and secondary metabolite research.

Breeders select for carotenoid expression as a heritable visual marker and to explore correlations between pigment chemistry and aromatic/cannabinoid profiles. Stable carotenoid phenotypes require consistent selection pressure across generations, and environmental standardization during breeding trials helps distinguish genetic from environmental color variation.