MTN3 — Oryza sativa Japonica

Summary

OsMTN3 (also known as OsSWEET12, XA25, and RPG2) on rice chromosome 12 encodes a SWEET family protein with sugar transmembrane transporter activity, gibberellin transmembrane transporter activity, and sucrose permease activity. The gene is associated with grain filling, yield, and grain traits, as well as bacterial blight resistance and abiotic stress responses including drought and salt tolerance. It has been linked to pollen development, fertility, flowering, embryo development, and senescence. The protein localizes to the plasma membrane, Golgi membrane, and trans-Golgi network membrane. Associations include carbohydrate transport, auxin transport, gibberellic acid transport, seed growth and maturation, anther dehiscence, and responses to abscisic acid and salicylic acid. Studies of related genes in other species link the SWEET family to phloem loading, nectar secretion, and seed filling.