INV1 — Nicotiana attenuata

Summary

A4A49_07752 (INV1) in coyote tobacco (Nicotiana attenuata) encodes a protein with beta-fructofuranosidase and sucrose alpha-glucosidase activities. This gene is associated with phloem loading and unloading, carbohydrate storage, nectar secretion, seed development, leaf senescence, and secondary metabolite biosynthesis. INV1 is linked to traits including seed size, leaf length, photosynthetic and respiration rates, and abscisic acid, cytokinin, and phosphate content. The encoded protein localises to the apoplast, plant-type cell wall, and pollen tube. Studies of related genes in other species link the INV1 family to male sterility, nectar production, and cold-induced sweetening, as well as to fruit sweetness, grain size, root yield, and starch concentration.