Uv Induced Terpene Expression

UV-induced terpene expression refers to enhanced secondary metabolite production in cannabis plants exposed to specific ultraviolet light spectra, particularly UV-B. Breeders and cultivators have observed that controlled UV exposure can increase volatile compound concentrations in flowers and leaves, potentially affecting aroma profiles and resin composition. This phenomenon is rooted in plant photobiology—UV exposure triggers defense mechanisms that upregulate terpene synthesis. Research in controlled environments suggests UV-B wavelengths (280–320 nm) are most relevant to this response. The trait is genotype-dependent; some cultivars respond more dramatically than others. Documentation of this mechanism remains primarily observational within breeding communities rather than fully standardized across cultivation systems.

Breeders interested in terpene-rich phenotypes increasingly test UV exposure protocols during flower development to identify responsive genetics. This selective approach helps identify cultivars with robust secondary metabolite production capacity, which can be prioritized in breeding programs targeting aromatic or resin-dense offspring.