Identification and Expression Pattern Analysis of the bZIP Gene Family Based on the Whole Genome of Rosa chinensis (Jacq.)

Basic leucine zipper (bZIP) transcription factors play a crucial role in both biotic and abiotic stress responses in plants, making them essential candidates for stress-resistance breeding in Rosa chinensis (Jacq.). In this study, we utilized the whole genome sequencing data of R. chinensis and various biological information software to identify the RcbZIP transcription factor family and investigate its classification and expression patterns. Our findings revealed a total of 64 members in the RcbZIP family, with 35 members forming a gene cluster distributed across different chromosomes. Furthermore, we observed fragment duplication in only one pair of RcbZIP genes, indicating that tandem duplication was the primary driving force behind gene family amplification. Notably, a significant amplification of RcbZIP genes may have occurred prior to the divergence of R. chinensis and A. thaliana from their common ancestor. By integrating the expression patterns of RcbZIP genes under salt stress and their orthologous gene functions in Arabidopsis, we speculate that RcbZIP9, RcbZIP17, RcbZIP25, RcbZIP42, RcbZIP49, and RcbZIP53 may play a crucial role in the response of R. chinensis to salt stress. These results provide valuable insights for further research on the biological functions of RcbZIP genes, as well as their involvement in the growth, development, regulation, and stress response mechanisms in R. chinensis.