Monoterpene Synthase

Monoterpene synthase enzymes are the genetic machinery responsible for producing C10 volatile compounds in cannabis, including limonene, myrcene, pinene, and terpinolene. These proteins catalyze the cyclization and rearrangement of geranyl pyrophosphate (GPP) into diverse monoterpene structures. Understanding monoterpene synthase activity is foundational to breeding work targeting specific aroma and terpene profiles, as enzyme expression levels and substrate specificity directly influence the final volatile compound composition. Different monoterpene synthase isoforms are encoded across the cannabis genome, with expression patterns varying by tissue type, developmental stage, and genetic background. Breeders working in this category track synthase polymorphisms to predict and stabilize monoterpene ratios across generations.

Breeders use monoterpene synthase genetics as a primary lever for controlling aroma family expression without external inputs. Selecting for or against specific synthase alleles allows stabilization of mono-dominant or blended terpene profiles in seed lines.