PIP1 — Oryza sativa Japonica

Summary

OsPIP1 (OS04G0233400) on rice chromosome 4 encodes an aquaporin family protein with channel activity, phospholipase D activity, and multiple additional molecular functions including peptide binding and kinase activity. The gene is associated with carbon dioxide transport, hydrogen peroxide membrane transport, pore formation, and sucrose transport. It is linked to seed, root, and shoot phenotypes, water use, and xylem function in rice. Associations extend to agronomically important traits including drought sensitivity, boron tolerance, grain moisture content, nitrogen content, cadmium concentration, root volume, lateral root length, days to heading, and bacterial disease response. The protein localizes to the plasma membrane, plant-type cell wall, vacuole, chloroplast envelope, and other cellular compartments. Studies of related aquaporin family members in other species link the family to root hydraulic conductivity, stomatal immunity, and stress tolerance.