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摘要
NAC transcription factors widely participate in plant defense mechanisms against biotic and abiotic stresses. In our study, based on systematic bioinformatics methods, the evolutionary characteristics and transcriptional responses under multiple biotic and abiotic stresses were analyzed in NAC genes of Chenopodium quinoa. In total, 106, 54, and 54 NAC genes were identified in C. quinoa and its ancestral diploid species Chenopodium pallidicaule and Chenopodium suecicum. Chromosome location data indicated that 18 NAC genes in C. quinoa were involved in tandem duplication events. The phylogenetic tree of NAC genes of the three Chenopodium species demonstrated that gene duplication and loss occurred in C. quinoa. The number of relationships of syntenic genomic regions between C. quinoa, C. pallidicaule, and C. suecicum further proved that the reservation of substantial NAC genes from ancestral diploid species was the main source of gene duplication in C. quinoa. Under drought, heat, salt, and low Pi stresses and GCFSV infection, the expression profiles of many NAC genes in C. quinoa showed significant up- or down-regulation. These NAC genes may be involved in defense against various stressors. Our results provide NAC gene candidates for further genetic breeding of C. quinoa. ? 2022 Authors.
