PIP1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.6HG0631710 (symbol PIP1, HvPIP1) on barley chromosome 6H encodes an aquaporin, a member of the major intrinsic protein (MIP) family that forms water channels. The protein exhibits channel activity and water channel activity, and is localised to the membrane, plasmalemma, ER and cytosol. HvPIP1 is associated with water transport, regulation of phosphorylation, protein heterotetramerization and homotetramerization, primary root development, root hair cell development, leaf development, syngamy, and responses to salt, ABA signalling, osmotic stress and thirst. It is also linked to traits including leaf water potential, shoot fresh weight, transpiration rate and stomatal resistance. Studies of related genes in other species connect the family to water and stress responses.