Genome-Wide Analysis of the HDAC Gene Family and Its Functional Characterization at Low Temperatures in Tartary Buckwheat ().

Histone deacetylases (HDACs), widely found in various types of eukaryotic cells, play crucial roles in biological process, including the biotic and abiotic stress responses in plants. However, no research on the HDACs of has been reported. Here, 14 putative genes were identified and annotated in . Their gene structure, motif composition, -acting elements, phylogenetic relationships, protein structure, alternative splicing events, subcellular localization and gene expression pattern were investigated. The gene structure showed were classified into three subfamilies. The promoter analysis revealed the presence of various -acting elements responsible for hormone, abiotic stress and developmental regulation for the specific induction of Two duplication events were identified in , , and . The expression patterns of showed their correlation with the flavonoid synthesis pathway genes. In addition, alternative splicing, mRNA enrichment profiles and transgenic analysis showed the potential role of in cold responses. Our study characterized s, providing a candidate gene family for agricultural breeding and crop improvement.