AM25 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.7HG0666460 (HvAM25) on barley chromosome 7H encodes an aquaporin, a member of the major intrinsic protein (MIP) family. The product exhibits transmembrane transporter activities for lactate, arsenite, silicate, glycerol, borate, urea and water, and is annotated with channel activity and protein binding. HvAM25 is associated with transport of silicic acid, borate, arsenite, urea and hydrogen peroxide, as well as responses to boron, arsenic, glucose, hypoxia and defense. It localises to the lateral plasma membrane, Casparian strip, ER, cytoplasm and nucleus. The gene is linked to traits including boron uptake and deficiency tolerance, arsenite and aluminum tolerance, and processes such as root-to-shoot translocation, pollen development and pollination. Studies of related genes in other species connect the family to arsenic accumulation, silicon transport, salt stress, grain number and biomass yield.