INV1 — Daucus carota subsp. sativus

Summary

DCAR_023361 (DcINV1) on carrot chromosome 7 encodes a protein with glycoside hydrolase family 32 domains and beta-fructofuranosidase and sucrose alpha-glucosidase activities. This gene is associated with phloem unloading, carbohydrate storage, nectar secretion, and sucrose breakdown, as well as root development, ovule development, and defence responses to bacteria and fungi. The encoded protein localises to the apoplast, plant-type cell wall, and pollen tube. DcINV1 is linked to carbohydrate content, sucrose content, sugar content, respiration rate, and photosynthetic rate, and is associated with reduced cell-wall invertase activity and no nectar secretion. Related genes in other species link the family to fruit sweetness, root yield, grain size, cold-induced sweetening, male sterility, seed development, and nectar production.