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

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

[学科分类] 仪器

[关键词] Salvia miltiorrhiza;Arabidopsis thaliana;NAC transcription factors;Genome-wide analysis;Abiotic stress