PSY — Triticum turgidum subsp. durum

Summary

TRITD0UV1G062430, designated TtPSY (synonyms PSY, PSY1), encodes a protein with squalene synthase activity, PSase activity, dimethylallyltransferase activity, farnesyltranstransferase activity, and protein binding. The enzyme catalyses the conversion of prephytoene diphosphate to phytoene. TtPSY is associated with pigment accumulation and breakdown, chromoplast and chloroplast organisation, de-etiolation, embryo development ending in seed dormancy, and response to light stimulus. The protein localises to chromoplast stroma, etioplast, PG, chloroplast membrane, plastid, mitochondria, cytosol, and nucleus. Associations with grain traits include grain protein content, grain number, grain size, grain weight, test weight, grains per spike, ash content, flour colour, grain yellow pigment content, and alpha carotene content. Links to photosynthetic rate, flowering time, cell elongation, and abiotic stress responses have also been observed. Studies of related genes in other species connect the family to carotenoid content, endosperm colour, abscisic acid content, drought and cold tolerance, and yield.