PIN1 — Cicer arietinum

Summary

CaPIN1 (LOC101495470) on chickpea chromosome 6 encodes an auxin efflux carrier of the PIN family, possessing auxin efflux transmembrane transporter activity, inositol-1,4-bisphosphate 1-phosphatase activity, and phosphatidylinositol phosphate binding. The gene is associated with auxin transport, including acropetal auxin transport, and with regulation of endocytosis, cell polarization, phragmoplast microtubule organization, and plant-type cell wall organization. It is linked to responses to oxidative stress, boron, and cation stress, as well as anthocyanin accumulation in response to UV light. Traits associated with CaPIN1 include gravity response, phototropism, leaf vein morphology, shoot growth angle, lateral root number, root hair length, seed set, stamen morphology, and brassinosteroid and ethylene sensitivity. Studies of related genes in other species link the family to polar auxin transport, leaf vascular patterning, flower formation, root meristem growth, phototropism, and salt tolerance.