SUC2 — Brassica napus

Summary

BnSUC2 (SUC2, DARMORV10_A09P42030.1) on chromosome A09 of oilseed rape (Brassica napus) encodes a sucrose:proton symporter belonging to the sucrose symporter plant family and the major facilitator superfamily, with molecular functions including sucrose:proton symporter activity, maltose:proton symporter activity, and arbutin and salicin transmembrane transporter activities. The gene is associated with phloem sucrose loading, sucrose and maltose transport, cytokinin anabolism and breakdown, starch breakdown, cell growth, cell wall modification, pollen germination, seed development, leaf senescence, JA signaling, and membrane transport. It localizes to the plasma membrane, tonoplast, vacuole, Golgi complex, cis-Golgi network, pollen tube, cytoplasm, and nucleus. Associations with agronomic traits include grain yield, seed weight and size, starch and protein content, chlorophyll content, drought tolerance, root thickness, forage yield, and stomatal complex closure time. Studies of related genes in other species link the family to phloem loading, carbon partitioning, root growth, grain size, and cold acclimation.