GT1 — Sorghum bicolor

Summary

SbGT1 (SORBI_3010G015500) on sorghum chromosome 10 encodes a member of the oligopeptide transporter (OPT) family, possessing oligopeptide transmembrane transporter activity. The protein localises to the membrane and plasmalemma. In sorghum, SbGT1 is associated with oligopeptide transport, protein transport, pollen sperm cell differentiation, and embryogenesis. The gene has been connected to cadmium tolerance, flowering time, glutathione transport, and phytochelatin content in sink organs. Studies of the Arabidopsis relative OPT6 link the family to cadmium accumulation in reproductive sink organs, peptide transport, metal homeostasis, and zinc transport into shoots. Sequence similarity further connects the family to traits including cadmium concentration, drought tolerance, cold tolerance, plant height, grain number, tiller number, flowering time, and seed germination.