Terpenes are a large class of natural products found in plants that are involved in a variety of biological functions. The biosynthesis of terpenes in plants is a complex process that involves the condensation of five-carbon isoprene units to form various terpene skeletons. Terpenes are synthesized via two pathways: the mevalonate pathway and the non-mevalonate pathway. The mevalonate pathway is found in the cytoplasm of plant cells, while the non-mevalonate pathway is found in the plastids.