SUC2 — Arabidopsis thaliana

Summary

AT1G22710, also known as SUC2, SUT1 or AtSUC2, encodes a sucrose-proton symporter belonging to the major facilitator superfamily (MFS) and is associated with sucrose:proton symporter activity. This Arabidopsis thaliana gene on chromosome 1 is linked to phloem loading, phloem transport, carbon partitioning, and sink-source transition. SUC2 has been connected to grain size, grain yield, abiotic stress tolerance, and photoassimilate transport. It is associated with phloem-specific expression and phloem hydrostatic pressure, as well as carbon export to roots and plant growth. Additional associations include sucrose content, starch content, fructose content, carbohydrate content, photosynthetic rate, and respiration rate. The gene is also linked to seed development, grain filling, seed maturation, seed dormancy, leaf size, and plant development. Studies of related genes in other species connect the family to tuberization, yield, and flowering time.