Limonene Synthase

Limonene synthase is an enzyme that catalyzes the production of limonene, a monoterpene frequently detected in cannabis cultivars. Limonene biosynthesis occurs during terpene accumulation in resinous glandular trichomes, where genetic factors regulate enzyme activity and downstream terpene profiles. Cannabis breeders working with limonene-dominant strains often observe citrus, lemon, or diesel aromatic notes, though individual plant expression varies significantly. The gene encoding limonene synthase represents one pathway within broader terpene synthase gene families that influence secondary metabolite production. Understanding limonene synthase function supports breeding programs focused on terpene composition and chemotype diversity.

Breeders monitor limonene synthase activity when selecting for citrus-forward chemotypes or when developing cultivars with consistent lemon and grapefruit aromatic profiles. This enzyme's expression level influences the ratio of limonene relative to competing monoterpenes, making it a useful marker for terpene-focused breeding objectives.