FAD2 — Daucus carota subsp. sativus

Summary

DCAR_027655 (DcFAD2) on carrot chromosome 8 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. This endoplasmic reticulum membrane protein is associated with unsaturated fatty acid anabolism, fatty acid metabolism, and lipid metabolism. DcFAD2 is associated with linoleic acid, alpha-linolenic acid, and xanthophyll content, as well as temperature stress responses, aphid response, flower development, water use efficiency, stomatal resistance, seed growth and development, disease tolerance, and plant growth traits. The gene is associated with 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 link the family to oleic acid content, fatty acid desaturation, salt tolerance, and resistance to Botrytis cinerea.