AGR — Pisum sativum

Summary

PSAT4G014080 (AGR, also known as PsPIN2) on chromosome 4LG4 encodes a member of the PIN-like auxin efflux carrier family, possessing auxin efflux transmembrane transporter activity and inositol-1,4-bisphosphate 1-phosphatase activity. The gene is associated with basipetal and acropetal auxin transport, gravity sensing and shoot gravitropism, and phosphoinositide-mediated signaling. It has been linked to numerous traits including root gravitropic response, relative root length, lateral root length, root hair length, phototropism, leaf morphology and vein patterning, shoot branching, anther and stamen morphology, petiole length, seedling hypocotyl length, water use efficiency, stomatal resistance, osmotic response sensitivity, ethylene and brassinosteroid sensitivity, stem senescence, and radiation response. The protein localizes to the basal plasma membrane, auxin efflux carrier complex, and endoplasmic reticulum. Studies of related genes in other species link the family to gravitropic response, polar subcellular localization, auxin efflux, and salt tolerance.