PIP1 — Oryza sativa Japonica

Summary

OsPIP1 (OS02G0823100) on rice chromosome 2 encodes a plasma membrane intrinsic protein (PIP) belonging to the aquaporin family, with channel activity and additional annotated molecular functions including phospholipase D activity, peptide binding, and kinase activity. The gene is associated with water use, drought stress response, and cold stress response in rice, as well as with seed, root, shoot, and xylem phenotypes. It has been linked to numerous agronomic traits including grain moisture content, water use efficiency, drought sensitivity, boron tolerance, nitrogen content, cadmium concentration, root volume, lateral root length, days to heading, and germination rate. The protein localizes to the plasma membrane region, plant-type cell wall, plant-type vacuole, chloroplast envelope, and Golgi stack, and is connected to processes including carbon dioxide transport, response to water, circadian regulation of gene expression, and endocytosis. Studies of related genes in other species link the family to root hydraulic conductivity, stomatal closure, mesophyll conductance, and pathogen response.