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<p>Gray mold disease (GMD), caused by <i>Botrytis cinerea</i>, significantly reduces the postharvest quality and the market value of cut roses. However, the hormonal regulation of GMD resistance and flower longevity remains poorly understood. This study investigates how key plant hormones, ethylene (ETH), jasmonic acid (JA), and salicylic acid (SA), and their respective inhibitors affect disease progression and senescence in two <i>Rosa hybrida</i> cultivars differing in ETH sensitivity. ETH-sensitive flowers exhibited more severe GMD symptoms and faster senescence. Treatments with ETH and SA inhibitors significantly reduced disease severity and prolonged vase life, especially in ETH-low sensitive flowers. In contrast, inhibition of JA biosynthesis accelerated GMD development and upregulated fungal pathogenicity-related gene expression. Gene expression analysis indicated strong antagonistic interactions between the ETH/SA and JA signaling pathways. These results highlight the critical role of hormone interactions in modulating disease resistance and postharvest longevity in cut roses. Our findings suggest that targeted hormonal modulation can improve the commercial quality and disease resilience of cut rose flowers.</p>

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Plant hormones interact to control postharvest quality in cut Rosa hybrida L. flowers and resistance to Botrytis cinerea

  • 期刊论文

  • 发表日期：

    2025年8月8日

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  • Suong Tuyet Thi Ha,
  • Ji Yeong Ham,
  • Yong-Tae Kim,
  • Byung-Chun In

摘要

Gray mold disease (GMD), caused by Botrytis cinerea, significantly reduces the postharvest quality and the market value of cut roses. However, the hormonal regulation of GMD resistance and flower longevity remains poorly understood. This study investigates how key plant hormones, ethylene (ETH), jasmonic acid (JA), and salicylic acid (SA), and their respective inhibitors affect disease progression and senescence in two Rosa hybrida cultivars differing in ETH sensitivity. ETH-sensitive flowers exhibited more severe GMD symptoms and faster senescence. Treatments with ETH and SA inhibitors significantly reduced disease severity and prolonged vase life, especially in ETH-low sensitive flowers. In contrast, inhibition of JA biosynthesis accelerated GMD development and upregulated fungal pathogenicity-related gene expression. Gene expression analysis indicated strong antagonistic interactions between the ETH/SA and JA signaling pathways. These results highlight the critical role of hormone interactions in modulating disease resistance and postharvest longevity in cut roses. Our findings suggest that targeted hormonal modulation can improve the commercial quality and disease resilience of cut rose flowers.