SUC1 — Phaseolus vulgaris

Summary

PHAVU_004G085100, designated PvSUC1 (also known as PvSUT1, PvSUT2, PvSUT5, and SUC1-8), encodes a sucrose:proton symporter belonging to the sucrose symporter plant family and the major facilitator superfamily. The gene is associated with phloem sucrose loading, glucoside and maltose transport, and sucrose metabolism. It has been linked to grain yield, grain size, unfilled grain number, sucrose content, pollen fertility, photosynthetic rate, drought tolerance, stomatal resistance, root thickness, and seed development. Additional associations include cell cycle regulation, auxin sensitivity, jasmonic acid content, oxidative stress response, and plant immunity. The protein localizes to the tonoplast, plasmodesmata, Golgi complex, vacuole, and pollen tube. Studies of related genes in other species link the family to phloem loading, carbon partitioning, seed development, biotin transport, and anther dehiscence.