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<p>Light quality regulates stomatal movement and influences gas exchange and water vapor in plants, including cut flowers. However, excessive stomatal water loss in cut flowers often leads to their rapid wilting and quality disruption. In this study, leaf stomatal opening and water loss in cut carnations (<i>Dianthus caryophyllus</i> L. cv. ‘Master’) exposed to different light qualities were investigated. Our results showed that blue light exhibited the most pronounced stimulatory effect, resulting in the highest stomatal aperture and water loss rates. The transcriptome analysis revealed 4793 DEGs (differentially expressed genes), of which 4470 were exclusively responsive to blue light. The enrichment analyses consistently revealed a close association between these DEGs and the pathways related to photosynthesis and carbon metabolism. Furthermore, the in-depth examination of gene expression patterns using heatmaps and WGCNA (weighted gene co-expression network analysis) revealed gene expression changes associated with guard cell responses to blue light, photosynthesis, and carbon metabolism pathways. Altogether, these results provide insights into the stomatal opening and related molecular events in cut carnation leaves in response to blue light and their potential molecular mechanisms. Additionally, it lays the theoretical groundwork for utilizing light quality to modulate stomatal behavior and mitigate water loss in carnations and other cut flowers.</p>

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Stomatal opening and transcriptomic events in cut carnation leaves in response to blue light

  • 期刊论文

  • 发表日期：

    2025年6月10日

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  • Xiaohui Lin,
  • Songmei Liu,
  • Shenggen He,
  • Jiping Liu,
  • Yong Liu,
  • Changchun Ye,
  • Hongmei Li

摘要

Light quality regulates stomatal movement and influences gas exchange and water vapor in plants, including cut flowers. However, excessive stomatal water loss in cut flowers often leads to their rapid wilting and quality disruption. In this study, leaf stomatal opening and water loss in cut carnations (Dianthus caryophyllus L. cv. ‘Master’) exposed to different light qualities were investigated. Our results showed that blue light exhibited the most pronounced stimulatory effect, resulting in the highest stomatal aperture and water loss rates. The transcriptome analysis revealed 4793 DEGs (differentially expressed genes), of which 4470 were exclusively responsive to blue light. The enrichment analyses consistently revealed a close association between these DEGs and the pathways related to photosynthesis and carbon metabolism. Furthermore, the in-depth examination of gene expression patterns using heatmaps and WGCNA (weighted gene co-expression network analysis) revealed gene expression changes associated with guard cell responses to blue light, photosynthesis, and carbon metabolism pathways. Altogether, these results provide insights into the stomatal opening and related molecular events in cut carnation leaves in response to blue light and their potential molecular mechanisms. Additionally, it lays the theoretical groundwork for utilizing light quality to modulate stomatal behavior and mitigate water loss in carnations and other cut flowers.