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Attraction of the stink bug egg parasitoid Telenomus podisi to defence signals from soybean activated by treatment with cis-jasmone

Authors

  • Maria C. B. Moraes,

    1. Núcleo Temático Controle Biológico, Embrapa Recursos Genéticos e Biotecnologia, Cx. Postal 02372, CEP 70849-970, Brazilia DF, Brazil
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  • Raúl A. Laumann,

    1. Núcleo Temático Controle Biológico, Embrapa Recursos Genéticos e Biotecnologia, Cx. Postal 02372, CEP 70849-970, Brazilia DF, Brazil
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  • Martin Pareja,

    1. Núcleo Temático Controle Biológico, Embrapa Recursos Genéticos e Biotecnologia, Cx. Postal 02372, CEP 70849-970, Brazilia DF, Brazil
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  • Fabiana T. P. S. Sereno,

    1. Núcleo Temático Controle Biológico, Embrapa Recursos Genéticos e Biotecnologia, Cx. Postal 02372, CEP 70849-970, Brazilia DF, Brazil
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  • Mirian F. F. Michereff,

    1. Núcleo Temático Controle Biológico, Embrapa Recursos Genéticos e Biotecnologia, Cx. Postal 02372, CEP 70849-970, Brazilia DF, Brazil
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  • Michael A. Birkett,

    1. Centre for Sustainable Pest and Disease Management, Biological Chemistry Department, Rothamsted Research, Harpenden, Herts, AL5 2JQ, UK
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  • John A. Pickett,

    1. Centre for Sustainable Pest and Disease Management, Biological Chemistry Department, Rothamsted Research, Harpenden, Herts, AL5 2JQ, UK
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  • Miguel Borges

    Corresponding author
    1. Núcleo Temático Controle Biológico, Embrapa Recursos Genéticos e Biotecnologia, Cx. Postal 02372, CEP 70849-970, Brazilia DF, Brazil
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*Correspondence: M. Borges, Embrapa Recursos Genéticos e Biotecnologia-Parque Estação Biológica-W5 Norte, CEP 70770-900, Brasília DF, Brazil. E-mail: mborges@cenargen.embrapa.br, mcbmorae@cenargen.embrapa.br

Abstract

After herbivore attack or chemical activation, plants release a blend of volatile organic compounds (VOCs) that is qualitatively or quantitatively different to the blend emitted by an undamaged plant. The altered blend of VOCs is then usually attractive to the herbivore's natural enemies. Soybean, Glycine max (L.) (Fabaceae), when damaged by stink bug herbivory, has been shown to emit a blend of VOCs that attracts the stink bug egg parasitoid Telenomus podisi (Ashmead) (Hymenoptera: Scelionidae) to the plant. In this study, our aim was to investigate changes in the VOC profile of soybean (var. BR16) elicited by the naturally occurring plant activator cis-jasmone, and to determine whether these changes elicited the attraction of T. podisi. cis-Jasmone elicited chemical defence in soybean similar to that previously reported for stink bug damage. The main components induced by cis-jasmone were camphene, myrcene, (E)-ocimene, methyl salicylate, and (E,E)-4,8,12-trimethyltrideca-1,3,7,11-tetraene. In Y-tube behavioural bioassays, T. podisi preferred cis-jasmone treated plants over untreated plants. Thus, cis-jasmone appears to induce defence pathways in soybean similar to those induced by stink bug damage, and this phenomenon appears to be a promising tool for the manipulation of beneficial natural enemies in future sustainable stink bug control strategies. The delay in response demonstrates that cis-jasmone treatment is not directly causing the response, but, more importantly, that it is causing activation of induced defence, long after initial treatment.

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