Monoterpene Pathway

The monoterpene pathway represents the biochemical process through which cannabis plants synthesize C10 volatile compounds—the smallest and most aromatic terpenes. These single 10-carbon isoprene unit molecules (limonene, myrcene, pinene, terpinolene) are foundational to cannabis aroma profiles and are produced via the methylerythritol phosphate (MEP) pathway in plant plastids. Monoterpenes are highly volatile, meaning they readily evaporate and dominate the initial smell profile of fresh cannabis. Understanding monoterpene biosynthesis is central to cannabis breeding because these compounds are heritable traits controlled by multiple genes and environmental factors. Breeders select parent plants with desired monoterpene ratios to stabilize aromatic profiles across generations.

Breeders use monoterpene pathway knowledge to identify and stabilize dominant aroma phenotypes in crosses. By tracking which parent lines express high limonene or myrcene production, cultivators can predictably develop strains with consistent aromatic signatures.