Jasmonic Acid Signaling

Jasmonic acid (JA) signaling is a plant hormone pathway that regulates defense responses, stress tolerance, and secondary metabolite production in cannabis. This biochemical system activates when plants encounter physical damage, herbivory, or pathogenic stress, triggering the upregulation of terpenes, cannabinoids, and other defensive compounds. Breeders and researchers track JA-responsive genetics because plants with robust jasmonic acid signaling often express more volatile terpenes and resin production under environmental stress. Unlike exogenous application studies, natural JA pathway efficiency varies across cultivars based on underlying genetic architecture. Understanding this signaling cascade is relevant to breeding for resilience and secondary metabolite diversity rather than for claims about plant effects.

Breeders working with stress-resilient lines and terpene-rich phenotypes often select for cultivars with responsive jasmonic acid pathways, as JA signaling directly influences the biosynthesis and accumulation of defensive volatiles. Genetic markers linked to JA receptor sensitivity and downstream transcription factor activity are increasingly used in marker-assisted selection programs.