SUC1 — Sorghum bicolor

Summary

SORBI_3008G193300 (SUC1, also known as SbSUC1) encodes a SUC4-like protein belonging to the sucrose symporter family and the major facilitator superfamily (MFS). The gene product is annotated with sucrose:proton symporter activity, maltose:proton symporter activity, and sugar transmembrane transporter activity, among other transport functions. SbSUC1 is associated with phloem sucrose loading, glucoside and maltose transport, and sucrose metabolism. It has been linked to grain yield, grain filling, grain size, seed dormancy, plant height, root thickness, photosynthetic rate, days to flowering, and stress responses including oxidative stress and nematode response. The protein localizes to the tonoplast, chloroplast outer membrane, and pollen tube. Studies of related genes in other species connect the family to phloem loading, carbon partitioning, and plant growth, as well as grain filling and panicle development.