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The gene is a key gene in the vitamin B6 synthesis pathway, playing a crucial role in plant growth, development, and stress tolerance. To explore the family characteristics of the gene in ( ) and its regulatory function under waterlogging stress, this study used five genes from Arabidopsis thaliana as the basis for sequence analysis. Thirteen, eight, and six genes were identified in , ( ), and ( ), respectively. Bioinformatics study reveals high conservation of subfamily genes during evolution, and genes in respond to waterlogging stress.In order to further investigate the effect of the gene on waterlogging tolerance in , expression analysis was conducted on gene overexpressing plants and wild-type plants. The study showed that overexpressing plants could synthesize more VB6 under waterlogging stress, exhibit stronger antioxidant enzyme activity, and have a more effective and stable ROS scavenging system, thus exhibiting a healthier phenotype. These findings suggested that the gene can enhance the waterlogging tolerance of , which is of great significance for its response to waterlogging stress. Our study provides a basic reference for further research on the regulation mechanism of the gene and waterlogging tolerance in .