INV1 — Solanum lycopersicum

Summary

SlINV1 (INV1, CWIN2) on tomato chromosome 10 encodes a beta-fructofuranosidase (invertase) with sucrose alpha-glucosidase and O-glucosyl hydrolase activities, belonging to the Glyco_hydro_32 family. The gene is associated with phloem loading and unloading, sucrose transport and signaling, nectar secretion, vacuolar localization, and carbohydrate storage and metabolism. It has been linked to fruit sweetness, dry weight, firmness, color, and size; starch, sugar, glucose, sucrose, and lycopene content; seed weight and viability; leaf area index, chlorosis, and curling; flower abortion; and net photosynthetic rate, water use efficiency, and respiration rate. Studies of related genes in other species link the family to male sterility and nectar production, and to cold-induced sweetening.