PIN1 — Medicago truncatula

Summary

MtPIN1 (MTR_8G107360) on barrel medic chromosome 8 encodes an auxin efflux carrier, possessing auxin efflux transmembrane transporter activity, inositol-1,4-bisphosphate 1-phosphatase activity, and phosphatidylinositol phosphate binding. The gene is associated with leaflet formation, regulation of shade avoidance, stigma development, anthocyanin accumulation in response to UV light, and detection of oxidative stress. It is linked to numerous traits including lateral root number, shoot axis branching, root mass density, seed set percent, shoot growth angle, petiole length, leaf shape, and herbicide sensitivity. Additional associations include auxin efflux, gravitropism, phototropism, brassinosteroid content, and plant height. Studies of related genes in other species link the family to polar auxin transport, leaf vascular patterning, flower formation, root meristem growth, and phototropism.