Terpene Biosynthesis

Terpene biosynthesis refers to the biochemical pathways through which cannabis plants produce monoterpenes, sesquiterpenes, and other volatile organic compounds. These molecules originate from two primary precursors: geranyl pyrophosphate (GPP) and farnesyl pyrophosphate (FPP), which are built from the methylerythritol phosphate (MEP) pathway in the plant's plastids. The expression and activity of terpene synthase enzymes determine which specific terpenes accumulate in trichomes and flowers. Genetic variation in promoter regions, enzyme kinetics, and transcript levels creates the chemical diversity observed across cultivars. Understanding terpene biosynthesis is fundamental to breeding work targeting aroma profiles, chemotype consistency, and stability across growing conditions.

Breeders use terpene biosynthesis knowledge to select parent plants with consistent volatile profiles and to predict how crosses may combine or suppress specific aromatic compounds. Stabilizing terpene expression across generations requires awareness of both genetic factors (allelic variation in synthase genes) and environmental influences on enzyme activity.