Scholarlink

<p>Rice (<i>Oryza sativa</i> L.) heading date is a primary determinant of regional adaptation and grain yield potential. While traditionally characterized as developmental timers within photoperiodic signaling pathways, emerging evidence indicates that core flowering-time regulators—such as <i>Hd1, Ehd1</i>, and <i>Ghd7</i>—function as higher-order physiological hubs with extensive pleiotropic effects. This review provides a comprehensive synthesis of how the rice flowering network transcends the floral transition to coordinate whole-plant physiological and developmental homeostasis. We first analyze the functional diversification of photoperiodic and circadian regulators, detailing their roles in governing plant architecture and yield components through the modulation of meristem identity and panicle branching. Furthermore, we evaluate the molecular mechanisms by which these regulators interface with hormonal crosstalk—encompassing gibberellins, abscisic acid, and jasmonates—to mediate the allocation of resources between reproductive investment and stress survival. The review also highlights the coordination of resilience to abiotic stressors, including drought, salinity, and extreme temperatures, while emphasizing the role of epigenetic and chromatin-level regulation in stabilizing these environmental responses. Finally, we discuss the integration of nutrient signaling and metabolic homeostasis, with a specific focus on the carbon–nitrogen balance. By redefining flowering-time genes as central regulatory layers of whole-plant physiology, this review underscores their potential as primary targets for precision molecular breeding. A systematic understanding of these multifaceted networks will be essential for the development of climate-resilient and high-yielding rice cultivars under increasing environmental variability.</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

Beyond heading date in rice: pleiotropic roles of flowering-time genes in development, stress adaptation, and metabolism

  • 期刊论文

  • 发表日期：

    2026年7月6日

查看全文
  • Seungho Lee,
  • Gibeom Baek,
  • Noeul Kang,
  • Yaesong Seo,
  • Hwayu Park,
  • Na-Hyun Shin,
  • Jinmi Yoon,
  • Lae-Hyeon Cho

摘要

Rice (Oryza sativa L.) heading date is a primary determinant of regional adaptation and grain yield potential. While traditionally characterized as developmental timers within photoperiodic signaling pathways, emerging evidence indicates that core flowering-time regulators—such as Hd1, Ehd1, and Ghd7—function as higher-order physiological hubs with extensive pleiotropic effects. This review provides a comprehensive synthesis of how the rice flowering network transcends the floral transition to coordinate whole-plant physiological and developmental homeostasis. We first analyze the functional diversification of photoperiodic and circadian regulators, detailing their roles in governing plant architecture and yield components through the modulation of meristem identity and panicle branching. Furthermore, we evaluate the molecular mechanisms by which these regulators interface with hormonal crosstalk—encompassing gibberellins, abscisic acid, and jasmonates—to mediate the allocation of resources between reproductive investment and stress survival. The review also highlights the coordination of resilience to abiotic stressors, including drought, salinity, and extreme temperatures, while emphasizing the role of epigenetic and chromatin-level regulation in stabilizing these environmental responses. Finally, we discuss the integration of nutrient signaling and metabolic homeostasis, with a specific focus on the carbon–nitrogen balance. By redefining flowering-time genes as central regulatory layers of whole-plant physiology, this review underscores their potential as primary targets for precision molecular breeding. A systematic understanding of these multifaceted networks will be essential for the development of climate-resilient and high-yielding rice cultivars under increasing environmental variability.