PIP1 — Oryza sativa Japonica

Summary

OsPIP1 (OS04G0521100) on rice chromosome 4 encodes a protein with aquaporin-like and MIP domains, and annotated molecular functions including phospholipase D activity, peptide binding, and kinase activity. The gene is associated with carbon dioxide and sucrose transport, pore formation, hydrogen peroxide membrane transport, and responses to water, aluminum, and bacteria. It has been linked to traits including grain moisture content, drought sensitivity, water use efficiency, root volume, lateral root length, sodium uptake, nitrogen content, cadmium concentration, bacterial disease response, and floral organ number. Phenotypic associations include seed, root, shoot, xylem, and water use traits, as well as drought, cold, salt, and osmotic stress responses, yield, grain characteristics, and pathogen resistance. Studies of related genes in other species link the family to root hydraulic conductivity, stomatal closure, CO₂ diffusion, and resistance to Pseudomonas syringae.