AM25 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.6HG0615280 (symbol AM25, also known as NIP2;1) on barley chromosome 6H encodes an aquaporin-like protein with transmembrane transporter activity for lactate, arsenite, silicate, glycerol, borate, urea and water. The gene is associated with transport of these substrates, including silicic acid, borate and hydrogen peroxide, as well as responses to boron, arsenic, hypoxia and glucose, and regulation of defense responses. The protein localises to the plasma membrane, lateral plasma membrane, Casparian strip, ER, cytoplasm and nucleus. Associations with agronomically relevant traits include boron uptake and deficiency tolerance, arsenite and arsenate tolerance, aluminum tolerance and translocation, arsenic distribution, urea uptake, and root-to-shoot translocation. Related genes in other species link the family to silicon transport, salt stress, reproductive development and grain traits.