Mevalonate Pathway

The mevalonate pathway is a fundamental biochemical route through which cannabis plants synthesize isoprenoids—a large class of organic compounds including cannabinoids, terpenes, and sterols. Rather than a single terpene, the mevalonate pathway is the metabolic mechanism that generates the five-carbon building blocks (isoprene units) that combine to form all terpenes and related volatile compounds in cannabis. Understanding this pathway is central to plant genetics and breeding work focused on terpene expression and cannabinoid accumulation. Breeders and researchers studying cannabinoid-to-terpene ratios, chemotype stability, and secondary metabolite production often reference mevalonate pathway activity as a key factor in phenotypic variation.

Breeders working on consistent terpene profiles or targeting specific chemotypes may selectively work with lines showing robust mevalonate pathway expression, as this upstream biochemistry influences the abundance and diversity of downstream volatile compounds. Genetic variation in pathway enzymes can correlate with observable differences in resin production and aromatic intensity across cultivars