AM25 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.7HG0700690 (symbol AM25, also known as HvAM25) on barley chromosome 7H encodes an aquaporin-like protein with a major intrinsic protein (MIP) domain. The gene product exhibits transmembrane transporter activities for lactate, arsenite, silicate, glycerol, borate, urea, and water, as well as channel activity and protein binding. It is associated with transport of lactate, silicic acid, borate, arsenite, urea, and hydrogen peroxide, and with responses to boron, arsenic, glucose, hypoxia, and defense. The protein localizes to the lateral plasma membrane, Casparian strip, endoplasmic reticulum, and nucleus. AM25 is linked to boron uptake and deficiency tolerance, arsenite tolerance and uptake, aluminum tolerance and translocation, urea uptake, and pollen development and pollination. Related genes in other species connect this gene family to silicon transport, salt stress, arsenic accumulation, reproductive development, and grain traits.