NHX1 — Glycine max

Summary

GmNHX1 (GLYMA_19G240500V4) on soybean chromosome 19 encodes a sodium/hydrogen exchanger with potassium:proton antiporter activity, sodium transporter activity, and protein binding capability. It localizes to the vacuolar membrane, vacuole, plastid, mitochondria, cytosol, and plasmalemma. The gene is associated with sodium and potassium ion membrane transport, vacuolar membrane transport, cell pH regulation, stomatal opening, abscission, endocytosis, and auxin anabolism. It has been linked to drought tolerance, salinity tolerance, photosynthetic rate, chlorophyll content, plant height, and phosphorus uptake. Associations also include cell expansion, root growth, flower development, vacuolar pH, stomatal conductance and closure, transpiration, apical dominance, hypocotyl elongation, gravitropism, and fiber yield. Studies of related genes in other species connect the family to salt tolerance, potassium homeostasis, vacuolar pH regulation, heat and cold tolerance, seed germination, biomass production, and disease resistance.