Abstract:
TIFY transcription factors are crucial for regulating plant growth, development, and secondary metabolism. In this study, 21 TIFY transcription factors were identified in the
Cinnamomum camphora(L.) Presl. genome using bioinformatics analysis, and their expression patterns were evaluated based on transcriptome data. Conserved domain annotation and phylogenetic analysis revealed that
CcTIFYswere classified into four major subgroups, JAZ, ZML, TIFY, and PPD, with the JAZ group further clustered into six clades (JAZ Ⅰ to JAZ Ⅵ). The 21
CcTIFYswere unevenly distributed across nine chromosomes, and intraspecific collinearity analysis detected 14 syntenic gene pairs but no tandemly duplicated gene pairs, indicating that segmental duplication events played a vital role in the expansion of the
TIFYgenes in the camphor tree. Interspecific collinearity analysis suggested that CcTIFYs were most closely related to TIFYs in poplar. In addition, expression analysis indicated that two-thirds of the members exhibited tissue-specific expression. Notably
CcJAZ11,
CcTIFY1, and
CcJAZ4/5showed higher expression in flowers, roots, and developing seeds, respectively. Among the different chemotypes, five members were differentially expressed in leaf tissue, including four up-regulated genes in the citral type and one up-regulated gene in the methyl eugenol type. This study provides insights into the molecular mechanisms of tissue development and secondary metabolite production in the camphor tree.