AM25 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.6HG0550830 (HvAM25) on barley chromosome 6H encodes an aquaporin family protein with transmembrane transporter activities for lactate, arsenite, silicate, glycerol, borate, urea and water. The gene is associated with transport and detoxification of multiple metalloids and nutrients, including boron, arsenic, silicon and aluminum. It has been linked to responses to hypoxia, glucose, and defense, and to regulation of defense responses. The encoded protein localises to the plasma membrane, lateral plasma membrane, Casparian strip, endoplasmic reticulum and nucleus. Associations with agronomic traits include boron uptake and deficiency tolerance, arsenite and arsenate tolerance, aluminum tolerance and translocation, urea uptake, pollen development and pollination, and root-to-shoot translocation of minerals. Studies of related genes in other species link the family to silicon transport, salt and drought sensitivity, grain number, seed weight, biomass yield and water use efficiency.