Research Progress of HKT Transporter Genes in Plants

摘要

HKT transport protein is an ion transporter that exists on plasmalemma and a ubiquitous transmembrane protein responsible for Na+transport and K^+-Na^+ symport.HKT transport protein is regulated by the expression of HKT family genes.The overexpression of HKT family genes can improve activity of Na+transport and K^+-Na^+ symport proteins in plants,lead to Na+recycle,reduce Na^+ concentration in vivo,maintain K^+/ Na^+ ratio,and ensure normal physiological functions of cells,thereby improving salt tolerance of plants.This paper introduced the discovery and cloning of HKT family genes,revealed interactions between HKT family genes and SOS,NHX genes,and summarized the relationship between the structure,function of HKT protein and salt tolerance of plants to clarify the function and mechanism of action of HKT transport protein,aiming at laying the foundation for genetic engineering of plants for salt tolerance and providing basis for breeding haloduric transgenic plant.