Identification of the gene family and regulation of metabolites under salt stress in .

The transcription factor family plays important roles in plant growth and development, response to stress, and regulation of secondary metabolite biosynthesis. The identification and molecular function of gene have been deeply studied in the model plant , but it has not been reported in the medicinal plant . In this study, 65 genes were identified in the genome of , which were distributed on seven chromosomes, were highly conserved, could be classified into 11 subgroups. Transcriptomic and metabolomic data for leaves of exposed to salt stress were analyzed to construct an gene co-expression network and metabolite correlation network. Seventeen genes were co-expressed with 79 transcription factors, and GO and KEGG enrichment analysis showed that most of these genes were associated with abiotic stress and hormone responses of plants. 17 genes regulated 110 metabolites through 92 transcription factor associations. In addition, , and were associated with six metabolites including three alkaloids (quinoline alkaloid stylopine, indole alkaloids tabersonine and indole-3-acetic acid), flavonoid myricetin 3-O-galactoside, and two primary metabolites 2-hydroxy-6-aminopurine, 3-dehydroshikimic acid were strongly correlated. This study provides data for identification of the gene family and their regulation of metabolites in response to salt stress.