Uv B Pigmentation

UV-B pigmentation refers to the development of anthocyanins and other photoprotective compounds in cannabis plants when exposed to ultraviolet-B radiation during flowering. This response is a natural stress adaptation that can produce purple, blue, or dark red coloration in flowers and leaves. Breeders working in this category often select for genetics that express these pigments reliably under controlled UV-B conditions. The trait is genetically influenced but environmentally activated, making it valuable for research into plant stress responses and secondary metabolite production. UV-B exposure and resulting pigmentation are studied in breeding programs examining cannabinoid and terpene expression patterns under various light spectra.

Breeders use UV-B response as a marker for genetic vigor and stress-adaptation capacity. Selection for consistent pigmentation under UV-B light helps identify plants with robust secondary metabolite production systems.