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<p>A plant emits diverse volatile compounds and communicates with other organisms at different trophic levels. Hot pepper, <i>Capsicum annuum</i>, leaves produced different compositions of 41 organic compounds upon an infestation by the western flower thrips, <i>Frankliniella occidentalis</i>. These compounds induced a non-preference behavior to the thrips while they attracted a natural enemy, <i>Orius laevigatus</i>. Among the differentially emitted compounds, <i>Z</i>-3-methyl hexenoate (MeH) and linalool repelled the herbivore but attracted the predator. MeH or linalool biosynthesis was suppressed by virus-induced gene silencing of <i>hydroperoxide lyase</i> (<i>HPL</i>) or <i>linalool synthase</i> (<i>LS</i>) expression in the hot pepper and led to significant malfunction in the tri-trophic communication. This communication was mediated by jasmonic acid (JA), but not salicylic acid, signal in the hot pepper. Plant growth-promoting rhizobacteria also induced the antixenosis of hot peppers through JA signaling. Hot peppers resistant against the thrips were positively correlated with <i>HPL</i> or <i>LS</i> expression levels.</p>

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Methyl hexenoate and linalool emitted by hot peppers repel western flower thrips (Frankliniella occidentalis) and attract their predator (Orius laevigatus)

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月1日

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  • Mojtaba Esmaeily,
  • Akhtar Ayoobi,
  • Gahyeon Jin,
  • Eeshita Mandal,
  • Niayesh Shahmohammadi,
  • Chulyoung Kim,
  • Keono Kim,
  • Hyunje Park,
  • Falguni Khan,
  • Daehong Lee,
  • Hee-Jin Kim,
  • Eunhye Ham,
  • Hyong Woo Choi,
  • Yongho Jeon,
  • Jeehye Sung,
  • Yonggyun Kim

摘要

A plant emits diverse volatile compounds and communicates with other organisms at different trophic levels. Hot pepper, Capsicum annuum, leaves produced different compositions of 41 organic compounds upon an infestation by the western flower thrips, Frankliniella occidentalis. These compounds induced a non-preference behavior to the thrips while they attracted a natural enemy, Orius laevigatus. Among the differentially emitted compounds, Z-3-methyl hexenoate (MeH) and linalool repelled the herbivore but attracted the predator. MeH or linalool biosynthesis was suppressed by virus-induced gene silencing of hydroperoxide lyase (HPL) or linalool synthase (LS) expression in the hot pepper and led to significant malfunction in the tri-trophic communication. This communication was mediated by jasmonic acid (JA), but not salicylic acid, signal in the hot pepper. Plant growth-promoting rhizobacteria also induced the antixenosis of hot peppers through JA signaling. Hot peppers resistant against the thrips were positively correlated with HPL or LS expression levels.