INV1 — Daucus carota subsp. sativus

Summary

DCAR_013406 (DcINV1) on carrot chromosome 4 encodes a beta-fructofuranosidase (invertase) with sucrose alpha-glucosidase activity, belonging to the glycosyl hydrolase family 32. This cell-wall-localized enzyme is associated with phloem unloading, carbohydrate storage, nectar secretion, and sucrose breakdown. It has been linked to root development, ovule development, and defence responses to bacteria and fungi. The gene is associated with carbohydrate content, sucrose content, sugar content, respiration rate, and photosynthetic rate. Studies of related genes in other species link the family to seed development, nectar production, male sterility, and cold-induced sweetening. The broader gene family has been associated with fruit sweetness, root yield, grain size, and starch concentration across diverse species.