Monoterpene Biosynthesis

Monoterpene biosynthesis is the biochemical pathway through which cannabis plants produce C10 volatile compounds—the foundational aromatic molecules in cannabis. These single-unit terpenes (limonene, myrcene, pinene, etc.) are synthesized primarily in trichome glands through the mevalonate and methylerythritol phosphate pathways, which convert simple precursors into the diverse volatile profiles observed across cultivars. Understanding monoterpene biosynthesis is central to cannabis genetics, as these compounds are inherited and expressed according to plant genotype, environmental stress, and developmental stage. Breeders track monoterpene-dominant chemotypes by observing phenotypic aroma expression and through modern genetic sequencing of terpene synthase genes responsible for their production.

Breeders select for monoterpene biosynthesis capacity when targeting specific aroma families or creating consistent aromatic profiles across generations. Knowledge of the genes encoding terpene synthases allows breeders to identify and stabilize cultivars with predictable volatile output.