INV1 — Nicotiana attenuata

Summary

A4A49_39641 (INV1) in Nicotiana attenuata encodes a beta-fructofuranosidase (invertase) with sucrose alpha-glucosidase and O-glucosyl hydrolase activities, belonging to the Glyco_hydro_32 family. This gene is associated with sucrose breakdown, carbohydrate storage and metabolism, phloem loading and unloading, nectar secretion, secondary metabolite biosynthesis, leaf senescence, seed development, and ovule development. The encoded protein localizes to the apoplast, plant-type cell wall, and pollen tube. INV1 is linked to traits including seed size, leaf length, photosynthetic and respiration rates, and abscisic acid, cytokinin, and phosphate content. Studies of related genes in other species connect the family to fruit sweetness, grain size, starch content, male sterility, and cold-induced sweetening.