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Key message <p>This study elucidates the functional characteristics of <i>VfSBP4</i>, <i>VfSBP10</i>, <i>VfSBP12</i> and <i>VfSBP17</i> under disease resistance and abiotic stress tolerance. It provides key genetic targets for the molecular breeding of stress-tolerant faba bean varieties.</p> Abstract <p>As an important food crop worldwide, faba bean (<i>Vicia faba</i> L.) production is limited by various stresses. The SQUAMOSA promoter binding protein (SBP) transcription factors play essential roles in regulating plant biological processes. However, knowledge regarding <i>Vicia faba</i> SBPs remains limited. In this study, 21 members of the <i>Vicia faba</i> SBP gene family were identified and designated as <i>VfSBP</i>s, characterized as nucleus-localized unstable hydrophilic proteins. Comprehensive analysis indicates that <i>VfSBPs</i> contain numerous elements related to disease resistance and abiotic stress tolerance. Functional analysis indicates that <i>VfSBP4</i> and <i>VfSBP17</i> influence plant stress resistance by reducing immune-regulatory responses and disrupting reactive oxygen species (ROS) homeostasis, thereby promoting pathogen infection. Conversely, <i>VfSBP10</i> and <i>VfSBP12</i> enhance resistance by inhibiting pathogen infection and maintaining ROS balance. Under drought and salt stress conditions, <i>VfSBP4</i> and <i>VfSBP17</i> overexpression increased stomatal aperture and water loss, exacerbating leaf wilting, whereas <i>VfSBP10</i> and <i>VfSBP12</i> overexpression reduced water loss and ROS accumulation, improving stress tolerance.</p>

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Contrasting roles of VfSBP transcription factors in regulating disease resistance and abiotic stress tolerance in faba bean

  • 期刊论文

  • 发表日期：

    2026年3月25日

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  • Shi Chen,
  • Hongguang Zhu,
  • Yi Yuan,
  • Guoyi Yang,
  • Ting Huang,
  • Limeng Dong,
  • Keke Li,
  • Yiting Li,
  • Junliang Yin,
  • Lu Hou,
  • Yujiao Liu

摘要

Key message

This study elucidates the functional characteristics of VfSBP4, VfSBP10, VfSBP12 and VfSBP17 under disease resistance and abiotic stress tolerance. It provides key genetic targets for the molecular breeding of stress-tolerant faba bean varieties.

Abstract

As an important food crop worldwide, faba bean (Vicia faba L.) production is limited by various stresses. The SQUAMOSA promoter binding protein (SBP) transcription factors play essential roles in regulating plant biological processes. However, knowledge regarding Vicia faba SBPs remains limited. In this study, 21 members of the Vicia faba SBP gene family were identified and designated as VfSBPs, characterized as nucleus-localized unstable hydrophilic proteins. Comprehensive analysis indicates that VfSBPs contain numerous elements related to disease resistance and abiotic stress tolerance. Functional analysis indicates that VfSBP4 and VfSBP17 influence plant stress resistance by reducing immune-regulatory responses and disrupting reactive oxygen species (ROS) homeostasis, thereby promoting pathogen infection. Conversely, VfSBP10 and VfSBP12 enhance resistance by inhibiting pathogen infection and maintaining ROS balance. Under drought and salt stress conditions, VfSBP4 and VfSBP17 overexpression increased stomatal aperture and water loss, exacerbating leaf wilting, whereas VfSBP10 and VfSBP12 overexpression reduced water loss and ROS accumulation, improving stress tolerance.