全球土地的盐碱化大大影响了农业生产，明晰植物盐胁迫反应的分子机理，培育耐盐品种是大豆遗传育种的重要目标之一。以往报道表明植物阳离子/质子转运蛋白类基因在植物盐胁迫反应中有很重要的作用，为了进一步发掘研究与植物盐胁迫反应相关的该类新基因，我们用生物信息学分析了大豆全基因组的阳离子/质子转运蛋白基因家族及其受盐处理后大豆转录组RNA-seq的基因表达数据，发现一个受盐处理诱导高表达的未有报道的新基因GmCHX2。我们拟采用qRT-PCR、大豆根毛转化、BY-2烟草细胞转化系统、拟南芥转化系统、大豆转化系统、蛙卵母细胞电生理模型、钠钾离子浓度检测、荧光共聚焦显微镜检测亚细胞定位等实验体系，检测其在植物盐胁迫反应中的功能，分析其对维持离子稳态的作用，揭示其在植物盐胁迫反应中的作用分子机理，为今后提高大豆耐盐遗传育种提供科学依据。

Global soil salinity threatened the crop productivity. It is important to understand the molecular mechanism of plant salt tolerance, so that it will help to improve the yield of soybean. The current reports showed that the members of the cation/proton antiporter family play an important role in plant response to the salinity. To further indetify and characterize new members of the cation/proton antiporter (CPA) family which are involved in the salt tolerance, we identified the soybean whole-genome CPA family members and analyzed their expression pattern from the RNA-seq data of soybean transcrpitome after salt treatment. A novel cation/proton antiporter gene GmCHX2, which is highly induced by saltiny, were identified. Now we are going to further investigate its function and molecular mechanisms in salt tolerance by utilizing the the techniques of molecular biology and genetics (such as qRT-PCR, soybean hairy root transformation system, BY-2 tobacco cell transformation system, Arabidopisis transformation system, soybean transformation system, X. laevis oocyte electophysiologyical model, ion content dection, cellular localization via fluorescence confocal microscope and so on). This study will provide a therotical support for soybean salt tolerance breeding.