PSY — Triticum turgidum subsp. durum

Summary

TRITD7BV1G231270, the durum wheat gene PSY (TtPSY) on chromosome 7B, encodes a protein with squalene/phytoene synthase and isoprenoid synthase domains, exhibiting squalene synthase, phytoene synthase, dimethylallyltransferase, and farnesyltranstransferase activities. This gene is associated with carotenoid and isoprenoid anabolism, pigment accumulation and breakdown, chromoplast and chloroplast organization, de-etiolation, response to light, embryo development, and protein stabilization. It localizes to plastids, chloroplast membranes, chromoplast stroma, etioplasts, mitochondria, cytosol, and nucleus. Associations include grain protein content, test weight, grain number, size, and weight, grains per spike, ash content, alpha-carotene content, pericarp color, flowering time, photosynthetic rate, and cell elongation. Studies of related genes in other species link the family to grain yield, drought and cold tolerance, abscisic acid content, and thermotolerance.