FAD2 — Daucus carota subsp. sativus

Summary

DCAR_017010 (symbol DcFAD2) on carrot chromosome 5 encodes a fatty acid desaturase with acyl-lipid omega-6 desaturase, delta12 fatty acid acetylenase, omega-3 fatty acid desaturase, and oleate D12-hydroxylase activities. The product localises to the endoplasmic reticulum membrane and is associated with unsaturated fatty acid anabolism, fatty acid and lipid metabolism, and glycolipid desaturation. DcFAD2 is associated with linoleic and alpha-linolenic acid content, xanthophyll content, water use efficiency, stomatal resistance, temperature stress responses, aphid response, flower and seed development traits, disease tolerance, and salt tolerance. Phenotypic associations include aphid resistance, altered fatty acid composition, tocopherol deficiency, suppressed cold stress phenotypes, punicic acid accumulation, seed oil melting point, seed viability, and lipid content. Studies of related genes in other species connect the family to oleate desaturation, salt tolerance, and resistance to Botrytis cinerea.