PSY — Solanum lycopersicum

Summary

SOLYC01G005940.4 (SlPSY) encodes a phytoene synthase, an enzyme with phytoene synthase, squalene synthase, dimethylallyltransferase and farnesyltranstransferase activities, and belongs to the isoprenoid synthase domain superfamily. In tomato, this gene is associated with carotenoid pigmentation, fruit pigmentation, lycopene biosynthesis, and stress response. It is linked to phytoene, beta-carotene, capsanthin, apocarotenoid and vitamin A anabolism, as well as lutein and chlorophyll breakdown, chromoplast organization, and sepal morphogenesis. The protein localizes to plastids, including etioplasts and chromoplast stroma, as well as mitochondria and the cytosol. Associations extend to fruit quality traits including lycopene, carotene, lutein, and flavonoid content, fruit weight, firmness, shape and size, and to photosynthetic rate, chlorophyll content, plant height, flowering time, seed dormancy, and drought tolerance.