FAD2 — Daucus carota subsp. sativus

Summary

DCAR_020161 (DcFAD2) on carrot chromosome 6 encodes a fatty acid desaturase with acyl-lipid omega-6 desaturase (cytochrome B5), delta12 fatty acid acetylenase, omega-3 fatty acid desaturase, oleate D12-hydroxylase, and acyl-CoA (9+3)-desaturase activities. The product localises to the endoplasmic reticulum membrane and is associated with unsaturated fatty acid anabolism, fatty acid metabolism, and lipid metabolism. DcFAD2 is associated with linoleic acid and alpha-linolenic acid content, xanthophyll content, temperature stress responses, aphid response and resistance, flower development, water use efficiency, stomatal resistance, seed growth and development, disease tolerance, and salt tolerance. Associations also include fatty acid desaturation deficiency, 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 link the family to oleic acid content, salt tolerance, and resistance to Botrytis cinerea.