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Published on: August 18, 2023
Genome-Wide Identification and Expression Analyses of the bZIP Transcription Factor Genes in moso bamboo
Feng Pan1, Min Wu2, Wenfang Hu3
1Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China. fengpan1231@163.com.
Abstract:
The basic leucine zipper (bZIP) transcription factor (TF) family is one of the largest gene families, and play crucial roles in many processes, including stress responses, hormone effects. The TF family also participates in plant growth and development. However, limited information is available for these genes in moso bamboo (Phyllostachys edulis), one of the most important non-timber forest products in the world. In the present study, 154 putative PhebZIP genes were identified in the moso bamboo genome. The phylogenetic analyses indicate that the PhebZIP gene proteins classify into 9 subfamilies and the gene structures and conserved motifs that analyses identified among all PhebZIP proteins suggested a high group-specificity. Microsynteny and evolutionary patterns analyses of the non-synonymous (Ka) and synonymous (Ks) substitution rates and their ratios indicated that paralogous pairs of PhebZIP genes in moso bamboo underwent a large-scale genome duplication event that occurred 7-15 million years ago (MYA). According to promoter sequence analysis, we further selected 18 genes which contain the higher number of cis-regulatory elements for expression analysis. The result showed that these genes are extensively involved in GA-, ABA- and MeJA-responses, with possibly different mechanisms. The tissue-specific expression profiles of PhebZIP genes in five plant tissues/organs/developmental stages suggested that these genes are involved in moso bamboo organ development, especially seed development. Subcellular localization and transactivation activity analysis showed that PhebZIP47 and PhebZIP126 were localized in the nucleus and PhebZIP47 with no transcriptional activation in yeast. Our research provides a comprehensive understanding of PhebZIP genes and may aid in the selection of appropriate candidate genes for further cloning and functional analysis in moso bamboo growth and development, and improve their resistance to stress during their life.
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