Abstract
High-affinity K+ (HKT) gene family is regulated the transport of Na+ and maintain the balance between Na+ and K+ in the process of plant growth, development and response to abiotic stress. Despite this fact, systemic and comprehensive studies on HKT in multiply plants remains unknown. A total of 29 HKT genes distributed on nine species were identified. Phylogenetic tree analysis results indicated that HKT genes were divided into five homology subfamilies. Combining structural analysis with protein contains five highly conservative motifs, HKT family has similar gene structures and special gene characteristics. Finally, the expression patterns of HKT showed two different dramatic changes in different organs and tissues under different salt stress in multiply plants. This study has many implications for research into the comparative genomics analysis of HTK gene family, which revealed regulation mechanism of HKT genes, is valuable for understanding development and response to abiotic stress in plant.
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