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<p><i>Paeonia lactiflora</i>, an important medicinal and horticultural plant, provides valuable insights into the relationship between reproductive growth and its medicinal/ornamental value. In this study, we conducted a comprehensive analysis using transcriptome and metabolome data from normal flowering (NF) and flower removal (FR) treated plants. A total of 36 samples from NF and FR groups at six stages were analyzed. The transcriptomic analysis revealed FR treatment significantly affects flavonoid metabolism in <i>P. lactiflora</i> in the time dimension (from the bud to the withering stages). Metabolomic analysis identified 409 flavonoid compounds. FR significantly increased the accumulation of flavonoid glycosides. Comparative analysis across different stages revealed the dynamic changes in flavonoid compounds during growth. The WGCNA results indicated a potential correlation between flavonoid accumulation in <i>P. lactiflora</i> roots and several biological regulators, including MYB/bHLH transcription factors, WD-40 proteins, and key signaling molecules (methyl jasmonate, gibberellins, and serine/threonine kinases). Our findings deepen the understanding of the molecular mechanisms underlying flavonoid biosynthesis in <i>P. lactiflora</i>, particularly the potential and limitations of reproductive growth and theoretical support for the practical output of the <i>P. lactiflora</i> industry.</p> Graphical Abstract <p><i>P. lactiflora</i> modulates the changes in metabolites, especially flavonoids, through signal transduction, transcriptional regulation, and structural gene expression changes in response to flower removal during reproductive growth.</p> <p></p>

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Analysis of the Molecular Mechanism of Flavonoid Responses in the Medicinal Plant Paeonia lactiflora to Flower Bud Removal

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Wenle Wang,
  • Defeng Zhuang,
  • Hui Li,
  • Feibiao Shan,
  • Junying Jia,
  • Minhui Li

摘要

Paeonia lactiflora, an important medicinal and horticultural plant, provides valuable insights into the relationship between reproductive growth and its medicinal/ornamental value. In this study, we conducted a comprehensive analysis using transcriptome and metabolome data from normal flowering (NF) and flower removal (FR) treated plants. A total of 36 samples from NF and FR groups at six stages were analyzed. The transcriptomic analysis revealed FR treatment significantly affects flavonoid metabolism in P. lactiflora in the time dimension (from the bud to the withering stages). Metabolomic analysis identified 409 flavonoid compounds. FR significantly increased the accumulation of flavonoid glycosides. Comparative analysis across different stages revealed the dynamic changes in flavonoid compounds during growth. The WGCNA results indicated a potential correlation between flavonoid accumulation in P. lactiflora roots and several biological regulators, including MYB/bHLH transcription factors, WD-40 proteins, and key signaling molecules (methyl jasmonate, gibberellins, and serine/threonine kinases). Our findings deepen the understanding of the molecular mechanisms underlying flavonoid biosynthesis in P. lactiflora, particularly the potential and limitations of reproductive growth and theoretical support for the practical output of the P. lactiflora industry.

Graphical Abstract

P. lactiflora modulates the changes in metabolites, especially flavonoids, through signal transduction, transcriptional regulation, and structural gene expression changes in response to flower removal during reproductive growth.