The ZIP gene family is a metal transporter capable of transporting various cations, including iron, manganese and zinc. Metal transport and balance in plants are very important for growth and development. However, the comprehensive analysis of ZIP genes has not been reported in potato (Solanum tuberosum L.). Based on the whole potato genome data, the members of potato ZIP gene family were identified and systematically analyzed. In total, 29 ZIP proteins from S. tuberosum were identified. Through the establishment of phylogenetic tree, ZIP proteins were divided into three subgroups. Gene structure analysis showed that many genes had multiple introns. Motif analysis showed that these StZIP proteins had similar motif composition patterns. Twenty-nine StZIP genes were located on 7 chromosomes. A cis-element identified that many StZIPs also contain abiotic stress-related elements. A heatmap of the StZIP gene family identified that the genes, only StZIP12, StZIP17 and StZIP26 were expressed in all tissues and organs. A representative member StZIP12 was selected for screening its expression characteristics to identify whether it was induced by Ralstonia solanacearum and abscisic acid (ABA) treatment. Quantitative real-time polymerase chain reaction (qRT-PCR) showed a positive result, which strongly suggested that the gene might be involved in potato response to bacterial wilt associated with ABA signaling pathway. Tissue localization showed that StZIP12 was mainly expressed in phloem and leaf vascular bundles of stem vascular system. These results laid a foundation for further experimental cloning and functional verification, as well as the study of the molecular mechanism of potato resistance to bacterial wilt.
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