Pigmentation Carotenoid

Carotenoid pigmentation in cannabis refers to the yellow, orange, and red hues produced by carotenoid compounds—β-carotene, lycopene, and xanthophyll—in leaves, bracts, and flowers. These pigments are present in most cannabis plants but become visually prominent under specific environmental conditions, particularly cooler temperatures, UV exposure, and nutrient stress during late flowering. Carotenoids function as accessory photosynthetic pigments and antioxidants in plant tissue. Lineage records frequently report carotenoid expression as a secondary trait in both indica and sativa families, though certain breeding lines have selected for enhanced visibility. Understanding carotenoid genetics remains limited compared to anthocyanin pigmentation, but breeders observe heritable variation in expression intensity and timing.

Breeders working in ornamental and boutique markets selectively stabilize carotenoid phenotypes for consistent color expression, though this trait is often polygenic and environmentally sensitive. Carotenoid prominence can serve as an indicator of plant stress response and environmental adaptation, making it relevant to breeding for resilience and late-season vigor.