PJB-2025-161
Genome-wide identification, characterization, and expression analysis of NAC transcription factor family in Toona sinensis
Xiaohan Cao, Tianhao Hu, Liping Ren, Xianhui Deng, Wenyang Wan, Dandan Yin and Miao Li
Abstract
The NAC transcription factor (TF) is among the most extensive and plant-specific gene families, playing a crucial role in plant growth, development, and reaction to abiotic stresses. Genome-wide identification of this gene family has not been conducted in Toona sinensis. In this study, we identified and analyzed 54 TsNAC genes in T. sinensis, examining gene structure, phylogenetic characteristics, chromosomal distribution, protein domains, cis-elements, synteny, and expression patterns. Subcellular localization analysis revealed predominant nuclear localization of the NAC protein in T. sinensis. A total of 6 tandem replication events and 21 fragment replication events were identified, which were speculated to promote the amplification of TsNACs gene family. According to their structural and phylogenetic characteristics, the 54 TsNAC genes were divided into 16 subfamilies. TsNAC genes were regulated by multiple cis-acting elements. The expression patterns of 13 TsNAC genes varied across four picking stages, with most genes showing significant changes in relative expression levels over time. This study provides new insights into the regulatory functions of TsNAC genes in the growth and development of Toona sinensis, thereby improving the understanding of characteristics and evolution of TsNAC gene family, and providing references for further studies on the functions of TsNAC genes in regulating terpenoid biosynthesis
To Cite this article:
Cao, X., T. Hu, L. Ren, X. Deng, W. Wan, D. Yin and M. Li. 2025. Genome-wide identification, characterization, and expression analysis of NAC transcription factor family in Toona sinensis. Pak. J. Bot., 57(6): DOI: http://dx.doi.org/10.30848/PJB2025-6(37)
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