PSY — Solanum lycopersicum

Summary

SlPSY (SOLYC03G031860.3) encodes a protein with phytoene synthase, squalene synthase, dimethylallyltransferase and farnesyltranstransferase activities, and belongs to the isoprenoid synthase domain superfamily. In tomato, SlPSY1 is associated with lycopene and abscisic acid biosynthesis, fruit ripening and pigmentation, and stress response. The gene is linked to fruit carotenoid content and color, carotenoid pigmentation, abscisic acid production, and leaf carotenoid biosynthesis. It is associated with numerous traits including fruit weight, shape, firmness, and quality, as well as beta-carotene, lutein, neoxanthin, and alpha carotene content, leaf color and thickness, stem diameter, root number, nitrate and flavonoid content, net photosynthetic rate, and drought tolerance. The protein localises to plastids, chloroplast membranes, chromoplast stroma, etioplasts, mitochondria, cytosol, and nucleus.