Abstract
WRKY is one of the largest transcription factor families in higher plants, playing a crucial role in plant growth, development, and responses to environmental stresses by binding to the W-box motif in the target gene promoters. Glycyrrhiza uralensis Fish. (G. uralensis), known for its extensive medicinal value and adaptation to saline-alkali environments, has garnered attention. However, information regarding the members and functions of the G. uralensis WRKY gene family is relatively limited. In this study, we identified 52 GuWRKY genes from the G. uralensis genome and comprehensively investigated their characteristics through phylogenetic analysis, examination of gene duplication events, analysis of gene structures, and conservation of protein motifs. The GuWRKY family was classified into seven groups based on phylogenetic analysis, and collinearity analysis revealed that many GuWRKY genes originated from segmental duplications, demonstrating a highly conserved domain. Promoter cis-element analysis indicated the presence of elements related to hormones, stress, and growth and development in GuWRKYs. Transcriptomic analysis revealed distinct expression patterns of GuWRKYs under salt stress, with GuWRKY31 identified as a potential key regulator in salt stress responses. Subcellular localization experiments validated some of the predicted results. The provided biological information lays a crucial foundation for further exploration of the functions of GuWRKY genes.
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