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<p>Basic Leucine Zipper (bZIP) transcription factors (TFs) play a crucial role in helping plants respond to abiotic stress, however, there is still a lack of studies on the functions of the bZIP TF family and their response mechanisms to abiotic stress in <i>Zanthoxylum</i> plants. A genome-wide systematic characterization revealed 180 and 163 putative <i>bZIP</i> genes in <i>Z. bungeanum</i> and <i>Z. armatum</i>, respectively. These genes can be classified into 12 groups and possess the typical bZIP conserved domains. Analysis of promoter <i>cis</i>-acting elements identified three functional categories: growth-related, hormone-responsive, and stress-responsive regulatory motifs. On average, quantitative comparison revealed that <i>Z. bu</i>ngeanum promoters contain 8.4 ABRE and 3.2 LTRE motifs per gene, <i>Z. arm</i>atum contain 5.7 ABRE and 1.9 LTRE per gene. The results demonstrate adaptive evolution in <i>Z. bungeanum</i> and <i>Z. armatum</i>, with significant expansion of the <i>bZIP</i> gene family. Transcriptome analysis and quantitative real-time PCR (qPCR) indicated the importance of the bZIP TFs family in response to abiotic stress in <i>Zanthoxylum</i> species. Comparative synteny, promoter element analysis, and interspecific expression comparison implied that polyploidization in the allotetraploid <i>Zanthoxylum bungeanum</i> had promoted the expansion of the I and S bZIP subfamilies and the enrichment of abscisic acid- and cold-responsive cis-elements. This study provides new insights into the adaptive evolution of <i>bZIP</i> genes in <i>Zanthoxylum</i> plants and offers valuable references for <i>Zanthoxylum</i> plant breeding.</p>

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Genome-wide Identification, Evolution Analysis and the Expression Patterns under Abiotic Stress of the bZIP Transcription Factor Families in Zanthoxylum Bungeanum and Zanthoxylum Armatum

  • 期刊论文

  • 发表日期：

    2026年2月3日

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  • Liangzhen Lan,
  • Jiahao Liu,
  • Kuo Dong,
  • Xiyuan Han,
  • Congying Li,
  • Hui Li,
  • Tianyu Zheng,
  • Ruihua Wu,
  • Yuzhen Chen

摘要

Basic Leucine Zipper (bZIP) transcription factors (TFs) play a crucial role in helping plants respond to abiotic stress, however, there is still a lack of studies on the functions of the bZIP TF family and their response mechanisms to abiotic stress in Zanthoxylum plants. A genome-wide systematic characterization revealed 180 and 163 putative bZIP genes in Z. bungeanum and Z. armatum, respectively. These genes can be classified into 12 groups and possess the typical bZIP conserved domains. Analysis of promoter cis-acting elements identified three functional categories: growth-related, hormone-responsive, and stress-responsive regulatory motifs. On average, quantitative comparison revealed that Z. bungeanum promoters contain 8.4 ABRE and 3.2 LTRE motifs per gene, Z. armatum contain 5.7 ABRE and 1.9 LTRE per gene. The results demonstrate adaptive evolution in Z. bungeanum and Z. armatum, with significant expansion of the bZIP gene family. Transcriptome analysis and quantitative real-time PCR (qPCR) indicated the importance of the bZIP TFs family in response to abiotic stress in Zanthoxylum species. Comparative synteny, promoter element analysis, and interspecific expression comparison implied that polyploidization in the allotetraploid Zanthoxylum bungeanum had promoted the expansion of the I and S bZIP subfamilies and the enrichment of abscisic acid- and cold-responsive cis-elements. This study provides new insights into the adaptive evolution of bZIP genes in Zanthoxylum plants and offers valuable references for Zanthoxylum plant breeding.