中文摘要：

HKT转运蛋白是存在质膜上的一种离子运输体,是生物界普遍存在的负责Na＋运输和K＋-Na＋同向运输的一种跨膜蛋白。HKT转运蛋白受到HKT家族基因表达调控。过量表达的HKT家族基因能够提高植物Na＋转运或K＋-Na＋同向转运蛋白活性,使植物体内Na＋再循环、降低体内Na＋浓度、维持K＋/Na＋比值、保持细胞正常生理功能从而提高植物的耐盐性。该研究主要对HKT家族基因的发现、克隆与SOS、NHX等基因的相互作用以及其表达蛋白的结构、功能与耐盐之间的关系进行了综述,旨在了解其功能和作用机理,为植物耐盐基因工程奠定基础,获得耐盐的转基因植物。

英文摘要：

The HKT transport protein is a kind of ion transporter,which exists on plasmalemma.It is ubiquitous and responsible for Na＋transport and K＋-Na＋symport.It belongs to transmembrane protein.HKT is subject to its family gene expression regulation.The over-expressing HKT family gene could improve plants＇ Na＋transport and K＋-Na＋symport,letting Na＋recycle and reducing its concentration.At the same time it plays an important role in maintaining K＋/Na＋ratio and keeping the normal physiological function,thus improving salt tolerance.The article summarized the discovery and clone of HKT family gene,morever,it introduced the interaction between HKT family gene and SOS,NHX.After knowing its function and mechanism of action,laid the foundation for genetic engineering of plants tolerance and getting haloduric transgenic plant.