AM25 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.1HG0049580 (HvAM25) on barley chromosome 1H encodes an aquaporin, a member of the major intrinsic protein (MIP) family. The protein exhibits transmembrane transporter activity for lactate, arsenite, silicate, glycerol, borate, urea and water, as well as channel activity and protein binding. HvAM25 is associated with transport of these solutes, responses to boron, arsenic, hypoxia and glucose, detoxification, and defense response regulation. It localises to the plasma membrane, lateral plasma membrane, Casparian strip, ER and cytoplasm. The gene is linked to boron uptake and deficiency tolerance, arsenite and arsenate tolerance, aluminum tolerance and translocation, urea uptake, pollen development and pollination, and root-to-shoot translocation. Studies of related genes in other species connect the family to silicon transport, reproductive development, salt and drought responses, grain number, seed weight, and biomass yield.