AM25 — Sorghum bicolor

Summary

SbAM25 (SORBI_3010G164100) on sorghum chromosome 10 encodes an aquaporin-like protein belonging to the MIP family, with transmembrane transporter activities for water, glycerol, urea, lactate, arsenite, silicate, and borate, as well as channel activity. It is associated with transport of these solutes, including borate, silicic acid, and hydrogen peroxide, and with responses to boron, arsenic, hypoxia, and glucose. The gene is linked to nodulation, phenylpropanoid metabolism, and defense regulation. It localizes to the plasma membrane, lateral plasma membrane, peribacteroid membrane, Casparian strip, and endoplasmic reticulum. Phenotypic associations include boron uptake and deficiency tolerance, arsenite and aluminum tolerance, urea uptake, pollen development, and pollination. Studies of related genes in other species connect the family to silicon transport, arsenic accumulation, salt and drought responses, and grain yield traits.