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<p>Basic leucine zipper (bZIP) transcription factors play a crucial role in the response to abiotic stress. However, there has been no comprehensive study on the <i>bZIP</i> gene family in honeysuckle (<i>Lonicera japonica</i> Thunb.) so far. In this study, through genome-wide screening, we identified 45 <i>bZIP</i> genes in honeysuckle. These genes were divided into 11 subfamilies according to their phylogenetic relationships; further motif analysis of these subfamilies showed that members within the same subfamily often have similar motif compositions. Cis-acting element analysis indicated that abscisic acid responsive elements and methyl jasmonate responsive elements were widely distributed in the promoter regions of <i>LjbZIP</i> genes, suggesting a close association between <i>LjbZIP</i> and abscisic acid as well as methyl jasmonate. In addition, after salt stress treatment, the expression levels of <i>LjbZIP</i> genes were analyzed by RT-qPCR. We found that 7 <i>LjbZIP</i> genes were up regulated after salt stress and showed a strong positive correlation with antioxidant enzymes. In conclusion, this study conducted the first genome-wide analysis of the <i>LjbZIP</i> gene family in honeysuckle. These findings provide valuable insights for improving honeysuckle quality and cultivating stress-resistant cultivars, and lay the foundation for further functional research of <i>LjbZIP</i> genes in plants.</p>

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Genome-wide identification of the bZIP gene family in Lonicera japonica and expression analysis under salt stress

  • 期刊论文

  • 发表日期：

    2025年8月23日

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  • Yuxing Lei,
  • Yi Zhang,
  • Yi Chen,
  • Huijie Zeng,
  • Sisi Liu,
  • Fuyuan Deng,
  • Dezhi Liao,
  • Zhongquan Qiao,
  • Gang He

摘要

Basic leucine zipper (bZIP) transcription factors play a crucial role in the response to abiotic stress. However, there has been no comprehensive study on the bZIP gene family in honeysuckle (Lonicera japonica Thunb.) so far. In this study, through genome-wide screening, we identified 45 bZIP genes in honeysuckle. These genes were divided into 11 subfamilies according to their phylogenetic relationships; further motif analysis of these subfamilies showed that members within the same subfamily often have similar motif compositions. Cis-acting element analysis indicated that abscisic acid responsive elements and methyl jasmonate responsive elements were widely distributed in the promoter regions of LjbZIP genes, suggesting a close association between LjbZIP and abscisic acid as well as methyl jasmonate. In addition, after salt stress treatment, the expression levels of LjbZIP genes were analyzed by RT-qPCR. We found that 7 LjbZIP genes were up regulated after salt stress and showed a strong positive correlation with antioxidant enzymes. In conclusion, this study conducted the first genome-wide analysis of the LjbZIP gene family in honeysuckle. These findings provide valuable insights for improving honeysuckle quality and cultivating stress-resistant cultivars, and lay the foundation for further functional research of LjbZIP genes in plants.