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<p>Gray mold disease (GMD), caused by <i>Botrytis cinerea</i> (<i>B. cinerea</i>) infection on rose petals, is an important disease of greenhouse rose flowers, that significantly decreases the ornamental value of cut flowers. This study investigated the potential of preharvest and postharvest treatment with nano silver (PrNS and PoNS, respectively) as a novel control strategy against GMD and to improve the vase life of rose flowers. PrNS treatment in the greenhouse (rose flowers were sprayed with NS) notably reduced the GMD infection rate and disease symptom severity in rose flowers than in the non-treated (NT) flowers. PoNS (cut roses were placed and sprayed with NS) and the combination of PrNS and PoNS treatments (Pr-PoNS) were more effective in suppressing <i>B. cinerea</i> growth in petals and prolonging the vase life of cut flowers than the NT and PrNS flowers. PoNS and Pr-PoNS also improved flower opening and water relations in cut roses during the vase period. The lower maximum quantum yield of PSII (F<sub>v</sub>/F<sub>m</sub>) values, higher non-photochemical quenching (NPQ) values, and elevated leaf and petal temperatures in NT flowers suggested that these parameters can be used to detect water stress and GMD infections in rose flowers. PoNS and Pr-PoNS effectively reduced ethylene damage and disease infection by downregulating the mRNA levels of ethylene biosynthesis and pathogenesis-related genes in rose petals. Furthermore, PoNS and Pr-PoNS reduced the mRNA levels of senescence-inducible and cytokinin degradation-related genes, while promoting the levels of cytokinin biosynthesis genes in petals, thus retarding flower senescence. Therefore, NS is effective in decreasing GMD infection and improving the postharvest life of rose flowers.</p>

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Pre and postharvest application of nano silver improves gray mold disease resistance and longevity of cut roses

  • 期刊论文

  • 发表日期：

    2025年1月14日

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

摘要

Gray mold disease (GMD), caused by Botrytis cinerea (B. cinerea) infection on rose petals, is an important disease of greenhouse rose flowers, that significantly decreases the ornamental value of cut flowers. This study investigated the potential of preharvest and postharvest treatment with nano silver (PrNS and PoNS, respectively) as a novel control strategy against GMD and to improve the vase life of rose flowers. PrNS treatment in the greenhouse (rose flowers were sprayed with NS) notably reduced the GMD infection rate and disease symptom severity in rose flowers than in the non-treated (NT) flowers. PoNS (cut roses were placed and sprayed with NS) and the combination of PrNS and PoNS treatments (Pr-PoNS) were more effective in suppressing B. cinerea growth in petals and prolonging the vase life of cut flowers than the NT and PrNS flowers. PoNS and Pr-PoNS also improved flower opening and water relations in cut roses during the vase period. The lower maximum quantum yield of PSII (Fv/Fm) values, higher non-photochemical quenching (NPQ) values, and elevated leaf and petal temperatures in NT flowers suggested that these parameters can be used to detect water stress and GMD infections in rose flowers. PoNS and Pr-PoNS effectively reduced ethylene damage and disease infection by downregulating the mRNA levels of ethylene biosynthesis and pathogenesis-related genes in rose petals. Furthermore, PoNS and Pr-PoNS reduced the mRNA levels of senescence-inducible and cytokinin degradation-related genes, while promoting the levels of cytokinin biosynthesis genes in petals, thus retarding flower senescence. Therefore, NS is effective in decreasing GMD infection and improving the postharvest life of rose flowers.