INV1 — Cucumis melo

Summary

MELO3C009488.2 (CmINV1) on melon chromosome 5 encodes a beta-fructofuranosidase with sucrose alpha-glucosidase and O-glucosyl hydrolase activities, belonging to the glycosyl hydrolase 32 family. This cell-wall invertase is associated with apoplast, plant-type cell wall and pollen tube localisation. It is linked to carbohydrate storage and metabolism, including sucrose and hexose breakdown, starch metabolism, phloem transport, fruit development and ripening, nectar secretion, plant ovule development, and defence response to bacteria. The gene is associated with traits including hexose and sucrose content, fruit weight and size, sugar content, photosynthetic and transpiration rate, respiration rate, stomatal resistance, and plant height. Studies of related genes in other species link the family to seed development, nectar production, and cold-induced sweetening.