Figure 9.

The linalool biosynthesis and its transcriptional regulation in O. fragrans flowers. GPP serve as the donor, OfTPS1/2/5/7 are located in plastid and express in 20 cultivars, whereas OfTPS6 is located in cytosol and express in 2 cultivars. Among them, OfTPS7 is a key linalool synthase gene and OfWRKY33 can directly interact with the W-box in the OfTPS7 promoter to manipulate linalool formation