Plant Secondary Metabolism

Plant secondary metabolism refers to chemical compounds produced by cannabis plants beyond primary growth and reproduction—including cannabinoids, terpenes, and flavonoids. These molecules accumulate in trichomes and leaf tissues, shaped by genetics, environmental stress, light exposure, and nutrient availability. Secondary metabolite production varies significantly across cultivars and strains, with lineage records frequently reporting distinct chemical profiles tied to specific breeding lines. Understanding secondary metabolism is central to cannabis genetics work, as these compounds form the biochemical foundation of strain identity and breeding objectives. Breeders working in this category select parents based on documented cannabinoid ratios, terpene expression, and phenotypic stability to develop consistent chemotypes.

Breeders use secondary metabolite profiles as measurable selection criteria, tracking offspring cannabinoid and terpene expression across generations to stabilize desired chemotypes. Crosses are often designed to combine secondary metabolite traits from complementary parents, enabling development of novel cannabinoid ratios or enhanced aromatic complexity.