Genome-wide identification of NAC gene family and expression analysis under abiotic stresses in Salvia miltiorrhiza

NAC (NAM, ATAF, CUC) is a class of transcription factors involved in plant growth regulation, abiotic stress responses, morphogenesis and metabolism. Salvia miltiorrhiza an important Chinese medicinal herb, but the characterization genes this species limited. In study, based on genomic databases, 82 were identified, which divided into 14 groups. Meanwhile, phylogenetic analysis, gene structure, chromosomal localization potential role SmNACs conditions also studied. The results revealed that some had different structures than others, advised these may have multiple/distinct functions. Real-time quantitative polymerase chain reaction (RT-qPCR) analysis showed exhibited differential expression patterns under salt drought stress. NaCl induced salinity treatments modulated several SmNAC more roots compared with leaves. Conversely, conditions, upregulated leaves roots. These will be useful for further study functional characteristics genes, especially response to stresses, thereby facilitate genetic breeding miltiorrhiza.