Scholarlink

<p>Amphibious plants escape submergence by plastically accelerating shoot growth, yet the mechanism underlying this convergent strategy remains unclear. Here, we demonstrate that PHYTOCHROME A (PHYA), a light photoreceptor, acts as a central regulator of the contrasting submergence escape capacities between amphibious <i>Alternanthera philoxeroides</i> and its terrestrial congener <i>A. pungens</i>. PHYA is distinctively regulated upon submergence in two congeners and negatively regulates submergence-induced elongation. Crucially, we find a <i>cis</i>-regulatory element (CRE) variant in the <i>PHYA</i> promoter between two congeners, which governs EIN3-dependent transcriptional repression and drives species-specific <i>PHYA</i> expression. Expanded investigation unveils phyletic retention of this CRE in other amphibious species, providing preliminary evidence for convergent evolution in the submergence escape capacity through independent co-option of the same CREs. Our findings demonstrate a role of PHYA in mediating submergence responses, deepen the understanding of the molecular basis for plant secondary aquatic adaptation, and inform flood-resilient crops engineering via <i>cis</i>-regulatory manipulation.</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

A cis-regulatory element of the PHYTOCHROME A gene confers the submergence escape capacity for amphibious plants

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月16日

查看全文
  • Chuanwei Yang,
  • Wenbo Liu,
  • Meiquan Qiu,
  • Chenshu Xie,
  • Huanhuan Lu,
  • Wenjing Liang,
  • Ruiyi Qiu,
  • Dongming Li,
  • Lin Li,
  • Ji Yang

摘要

Amphibious plants escape submergence by plastically accelerating shoot growth, yet the mechanism underlying this convergent strategy remains unclear. Here, we demonstrate that PHYTOCHROME A (PHYA), a light photoreceptor, acts as a central regulator of the contrasting submergence escape capacities between amphibious Alternanthera philoxeroides and its terrestrial congener A. pungens. PHYA is distinctively regulated upon submergence in two congeners and negatively regulates submergence-induced elongation. Crucially, we find a cis-regulatory element (CRE) variant in the PHYA promoter between two congeners, which governs EIN3-dependent transcriptional repression and drives species-specific PHYA expression. Expanded investigation unveils phyletic retention of this CRE in other amphibious species, providing preliminary evidence for convergent evolution in the submergence escape capacity through independent co-option of the same CREs. Our findings demonstrate a role of PHYA in mediating submergence responses, deepen the understanding of the molecular basis for plant secondary aquatic adaptation, and inform flood-resilient crops engineering via cis-regulatory manipulation.