AM25 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.7HG0672710 (HvAM25) on barley chromosome 7H encodes an aquaporin of the NIP (nodulin-26-like intrinsic protein) family, possessing water, glycerol, lactate, arsenite, silicate, borate and urea transmembrane transporter activities. The gene is associated with transport of boron, silicic acid, arsenite, lactate and urea, as well as with cellular responses to boron, arsenic and hypoxia. HvAM25 has been linked to defense responses, detoxification, nodulation and regulation of defense. It localises to the plasma membrane, lateral plasma membrane, Casparian strip and endoplasmic reticulum. The gene is associated with boron uptake and deficiency tolerance, arsenite and arsenate tolerance, aluminum tolerance and translocation, root-to-shoot arsenic distribution, and pollen development and pollination. Studies of related genes in other species link the family to silicon transport and salt stress tolerance.