Stress Induced Secondary Metabolites

Stress-induced secondary metabolites (SISMs) are compounds cannabis plants synthesize in response to environmental pressures—including UV exposure, nutrient deficiency, pathogen pressure, and temperature fluctuation. Rather than being essential for primary growth, these molecules accumulate as adaptive chemical defenses or photoprotectants. Common examples include elevated cannabinoid and terpene production under UV-B stress, and increased phenolic compounds during drought conditions. Understanding SISM pathways is critical for breeding programs seeking to enhance phytochemical profiles without relying solely on genetics. Growers and breeders increasingly study controlled stress protocols to map which cultivars respond with desirable metabolite shifts versus productivity loss.

Breeders working with stress tolerance leverage SISM traits to develop cultivars that maintain or increase secondary metabolite output under suboptimal conditions. Selective breeding for robust stress-response pathways can yield plants that express desired cannabinoid and terpene profiles across variable growing environments.