Expression of Na+/H+ antiporter geneKsNHX1 in Kochia sieversiana under saline-alkali stress. Expression of a Vacuolar Na+/H+ Antiporter Gene of Alfalfa Enhances Salinity Tolerance in Transgenic Arabidopsis Clning and Sequence Analysis of a Na+/H+ Antiporter Gene in HalophyteLimonium gmelinii Clning and Sequence Analysis of a Na+/H+ Antiporter Gene in HalophyteLimonium gmelinii