INV1 — Solanum tuberosum

Summary

PGSC0003DMG400008942, designated INV1 (also known as INVGF, CWIN2, and StCWINV2) on potato chromosome 9, encodes a protein with glycoside hydrolase family 32 domains and beta-fructofuranosidase and sucrose alpha-glucosidase activities. This gene is associated with cold-induced sweetening, a key potato storage trait, and with carbohydrate utilization, fructan anabolism, phloem sucrose unloading, and hexose metabolism. INV1 is linked to numerous agronomic traits including starch content, reducing sugar content, fructose and glucose levels, root yield, root fresh weight, grain size, amylose content, drought tolerance, photosynthetic rate, chlorophyll content, and heterosis. The encoded protein localizes to the apoplast, plant-type cell wall, and pollen tube. Related genes in other species link the family to male sterility, seed development, and nectar production.