Scholarlink

<p><i>Hydrangea macrophylla</i> is a widely cultivated ornamental plant and renowned for its colorful and bountiful floral inflorescences. Sepals, rather than petals, are the primary ornamental structures of <i>Hydrangea</i>. Expansin genes play critical roles in flower opening, however, their regulation in the growth and development of sepals in <i>Hydrangea</i> remains unclear. In this study, 26 expansin genes were identified based on genome and transcriptome data in <i>Hydrangea</i>, and they were classified into four subfamilies (EXPA, EXPB, EXLA and EXLB). Across different species, gene structure and conserved motifs of EXPs exhibited evolutionary conservation. The promoters of <i>Hydrangea</i> expansin genes primarily contained four categories of<i> cis-</i>acting elements: abiotic stress response, environment response, phytohormone response and transcription factor binding sites. Furthermore, <i>HmEXPA4</i>, <i>HmEXPA15</i>, and <i>HmEXPA17</i> were found to be associated with growth and development of sepals in decorative flowers, while five transcription factors (HmCIB1, HmPIF8, HmIAA14, HmIAA16, and HmHB1) were identified as potential upstream regulators of these <i>HmEXPs</i>. This research provides a foundation for the further studies on the mechanism underlying sepal development in <i>Hydrangeas</i>.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Genome-Wide Identification of Expansin Gene Family and Its Association with Sepal Expansion During Flower Opening in Hydrangea macrophylla

  • 期刊论文

  • 发表日期：

    2025年5月22日

查看全文
  • Youwei Fan,
  • Dan Yue,
  • Zhongshuo Liang,
  • Chun Liu,
  • Suxia Yuan

摘要

Hydrangea macrophylla is a widely cultivated ornamental plant and renowned for its colorful and bountiful floral inflorescences. Sepals, rather than petals, are the primary ornamental structures of Hydrangea. Expansin genes play critical roles in flower opening, however, their regulation in the growth and development of sepals in Hydrangea remains unclear. In this study, 26 expansin genes were identified based on genome and transcriptome data in Hydrangea, and they were classified into four subfamilies (EXPA, EXPB, EXLA and EXLB). Across different species, gene structure and conserved motifs of EXPs exhibited evolutionary conservation. The promoters of Hydrangea expansin genes primarily contained four categories of cis-acting elements: abiotic stress response, environment response, phytohormone response and transcription factor binding sites. Furthermore, HmEXPA4, HmEXPA15, and HmEXPA17 were found to be associated with growth and development of sepals in decorative flowers, while five transcription factors (HmCIB1, HmPIF8, HmIAA14, HmIAA16, and HmHB1) were identified as potential upstream regulators of these HmEXPs. This research provides a foundation for the further studies on the mechanism underlying sepal development in Hydrangeas.