PIP1 — Zea mays

Summary

ZmPIP1 (ZM00001EB185300) on maize chromosome 4 encodes an aquaporin of the PIP2-3 family, a plasma membrane intrinsic protein with channel activity and phospholipase D activity. It is associated with vascular transport, carbon dioxide transport, C4 photosynthesis, nitrate import, hydrogen peroxide membrane transport, and response to water. The gene has been linked to root moisture content, leaf water potential, turgor pressure, leaf relative water content, stomatal complex closure time, drought stress response, cold stress response, aluminum tolerance, salt response, phosphorus response, bacterial and downy mildew disease responses, and traits including leaf elongation rate, root hair length, lateral root length, cell elongation, and vegetative growth time. It localizes to the plasma membrane, plant-type cell wall, chloroplast envelope, and plant-type vacuole. Studies of related genes in other species connect the family to water transport, drought tolerance, hydrogen peroxide diffusion, and yield.