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<p>To create an ornamental plant that repels pests, transgenic torenia (<i>Torenia fournieri</i> Lind.) plants were generated expressing the 1,8-cineole synthase (<i>CINS</i>) from lavandin (<i>Lavandula</i> × <i>intermedia</i> Emeric ex Loisel.) under the control of the petal-specific <i>MYB1</i> promoter of morning glory (<i>Ipomoea nil</i> L.). All the regenerated transgenic plants showed <i>CINS</i> expression in petals but did not show morphological differences compared with non-transgenic plants. In regenerated transgenic CINS6 and CINS8 plants, which exhibited higher expression of <i>CINS</i> than the other transgenic plants, 1,8-cineole was detected in the head space above whole plants. Furthermore, in a two-choice assay using florets, CINS6 petals demonstrated significant repellent effects against western flower thrips (<i>Frankliniella occidentalis</i> (Pergrande)) compared with the non-transgenic control petals. These results suggest another way to prevent pest damage by herbivores in ornamental plants by releasing transgenic volatile compounds from florets.</p>

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Transgenic torenia plant emitting 1,8-cineole from petals repels thrips

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • Masato Tsuro,
  • Masayoshi Uefune,
  • Ayana Iwamoto,
  • Shungo Otagaki

摘要

To create an ornamental plant that repels pests, transgenic torenia (Torenia fournieri Lind.) plants were generated expressing the 1,8-cineole synthase (CINS) from lavandin (Lavandula × intermedia Emeric ex Loisel.) under the control of the petal-specific MYB1 promoter of morning glory (Ipomoea nil L.). All the regenerated transgenic plants showed CINS expression in petals but did not show morphological differences compared with non-transgenic plants. In regenerated transgenic CINS6 and CINS8 plants, which exhibited higher expression of CINS than the other transgenic plants, 1,8-cineole was detected in the head space above whole plants. Furthermore, in a two-choice assay using florets, CINS6 petals demonstrated significant repellent effects against western flower thrips (Frankliniella occidentalis (Pergrande)) compared with the non-transgenic control petals. These results suggest another way to prevent pest damage by herbivores in ornamental plants by releasing transgenic volatile compounds from florets.