PIP1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.6HG0602210, designated HvPIP1, encodes an aquaporin-like protein with water channel activity and channel activity, placing it in the major intrinsic protein (MIP) family. In barley, HvPIP1 is associated with water transport, regulation of phosphorylation, protein heterotetramerization and homotetramerization, primary root and root hair cell development, leaf development, syngamy, and responses to salt, osmotic stress, ABA signaling, and thirst. It localizes to the membrane, plasmalemma, ER, and cytosol. The gene is linked to leaf water potential, shoot fresh weight, transpiration rate, and stomatal resistance. Studies of related genes in other species, such as rice RWC3 and Arabidopsis PIP1-1, connect the family to water transport and stress responses, though these associations are not yet established for HvPIP1 itself.