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<p>Grapevine (<i>Vitis vinifera</i> L.) productivity is highly sensitive to water deficit, a condition of increasing concern in Mediterranean viticulture. The cultivar ‘Italia’, one of the most economically important table grapes in southern Italy, was selected to investigate physiological and molecular responses to drought. Six candidate genes previously identified in transcriptomic analyses (<i>VvPP2C4</i>, <i>VvPP2C8</i>, <i>VvGolS1</i>, <i>VvGolS2</i>, <i>VvHSP18</i>, and <i>VvRD26</i>) were analyzed using quantitative real-time PCR under controlled water stress conditions. The results revealed significant changes in expression, with four genes showing marked differential regulation, particularly those related to ABA signaling and osmoprotection. These findings provide the first targeted validation of candidate drought-responsive genes in ‘Italia’, highlighting their functional role and offering valuable information for breeding strategies aimed at improving grapevine resilience and sustainability under climate change.</p> Graphical Abstract <p></p>

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Gene expression and physiological responses in grapevine under water stress conditions

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月30日

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  • Isabella Mascio,
  • Michele Antonio Savoia,
  • Silvia Procino,
  • Gaetano Alessandro Vivaldi,
  • Domenica Nigro,
  • Claudio De Giovanni,
  • Valentina Fanelli,
  • Salvatore Camposeo,
  • Monica Marilena Miazzi,
  • Cinzia Montemurro

摘要

Grapevine (Vitis vinifera L.) productivity is highly sensitive to water deficit, a condition of increasing concern in Mediterranean viticulture. The cultivar ‘Italia’, one of the most economically important table grapes in southern Italy, was selected to investigate physiological and molecular responses to drought. Six candidate genes previously identified in transcriptomic analyses (VvPP2C4, VvPP2C8, VvGolS1, VvGolS2, VvHSP18, and VvRD26) were analyzed using quantitative real-time PCR under controlled water stress conditions. The results revealed significant changes in expression, with four genes showing marked differential regulation, particularly those related to ABA signaling and osmoprotection. These findings provide the first targeted validation of candidate drought-responsive genes in ‘Italia’, highlighting their functional role and offering valuable information for breeding strategies aimed at improving grapevine resilience and sustainability under climate change.

Graphical Abstract