Plant Secondary Metabolites

Plant secondary metabolites are organic compounds produced by cannabis plants that are not directly essential for basic growth or reproduction, but play important ecological and biochemical roles. In cannabis, these include cannabinoids (THC, CBD, CBG, and others), terpenes, flavonoids, and phenolic compounds. Secondary metabolites accumulate primarily in trichomes on flowers and leaves, and their composition varies widely across cultivars and environmental conditions. Breeders and researchers study these compounds to understand strain diversity, stability, and expression patterns. Secondary metabolite profiles are shaped by both genetics and cultivation conditions, making them a central focus of modern cannabis breeding programs. Understanding these compounds is fundamental to predictable strain development and consistent phenotype selection.

Breeders isolate and stabilize secondary metabolite expression through selective breeding, aiming to develop stable chemotypes with consistent cannabinoid and terpene ratios across generations. Phenotype screening for secondary metabolite profiles informs parent selection and helps establish reliable seed lines and cultivars.