MTN3 — Arabidopsis thaliana

Summary

AT5G23660, also known as MTN3 or SWEET12, encodes a SWEET family protein with sucrose permease activity and sugar transmembrane transporter activity. This gene is associated with phloem loading and unloading, carbon export to roots, seed filling, and sucrose transport. It has been linked to seed weight, starch content, fructose content, and seed development traits. SWEET12 is associated with disease tolerance and resistance, salicylic acid-mediated defense responses, and root microbiota colonization. The protein localizes to the plasma membrane and extracellular region and is associated with phloem development, autophagy, TOR signaling, nitrogen remobilization, and nitrogen use efficiency. Additional associations include root meristem development, root length, vascular cell wall composition, and assimilate translocation.