PIP1 — Oryza sativa Japonica

Summary

OsPIP1 (OS03G0861300) on rice chromosome 3 encodes a protein from the aquaporin superfamily, characterized by MIP and aquaporin_transptr domains. The gene product exhibits multiple molecular functions including phospholipase D activity, peptide binding and receptor activity, kinase activity, and heme binding. OsPIP1 is associated with carbon dioxide and sucrose transport, pore formation, phosphatidic acid metabolism, hydrogen peroxide membrane transport, and response to water. It localizes to the plasma membrane region, plant-type cell wall, vacuole, chloroplast envelope, and Golgi stack. The gene has been linked to agronomically important traits including grain moisture content, water use efficiency, drought sensitivity, root volume, lateral root length, nitrogen content, cadmium concentration, days to heading, and bacterial disease response. Studies of related genes in other species link the family to dehydration stress tolerance, stomatal closure, and hydrogen peroxide diffusion.