PIP1 — Oryza sativa Japonica

Summary

OsPIP1 (OS10G0481100) on rice chromosome 10 encodes an aquaporin with water channel activity, belonging to the MIP and aquaporin transporter families. It is associated with water transport, pore formation, membrane localisation, and protein heterotetramerization and homotetramerization. The gene has been linked to diverse agronomic traits including grain moisture content, grain yield, drought tolerance and sensitivity, salinity tolerance, cold tolerance, water use efficiency, transpiration rate, stomatal resistance, photosynthetic rate, rubisco content, chlorophyll content, nitrogen content, leaf drying, root volume, days to heading, anthesis time, floral organ number and identity, and organ identity. Additional associations include the ERAD pathway, endocytosis, secretion, MAPK cascade, RNA processing, homologous recombination, stamen development, hypersensitivity, and syngamy. Studies of related genes in other species further connect this aquaporin family to water transport functions.