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Species- and density-dependent induction of volatile organic compounds by three mite species in cassava and their role in the attraction of a natural enemy.
Pinto-Zevallos, Delia M; Bezerra, Ranna H S; Souza, Silvia R; Ambrogi, Bianca G.
Afiliação
  • Pinto-Zevallos DM; Laboratório de Ecologia Química, Departamento de Ecologia, Universidade Federal de Sergipe, Marechal Rondon, s/n - Jardim Rosa Elze, São Cristóvão, SE, CEP 49100-000, Brazil.
  • Bezerra RHS; Laboratório de Ecologia Química, Departamento de Ecologia, Universidade Federal de Sergipe, Marechal Rondon, s/n - Jardim Rosa Elze, São Cristóvão, SE, CEP 49100-000, Brazil.
  • Souza SR; Instituto de Botânica, Centro de Pesquisa em Ecologia e Fisiologia, Av. Miguel Estefano Água Funda, São Paulo, SP, CEP 09560-500, Brazil.
  • Ambrogi BG; Laboratório de Ecologia Química, Departamento de Ecologia, Universidade Federal de Sergipe, Marechal Rondon, s/n - Jardim Rosa Elze, São Cristóvão, SE, CEP 49100-000, Brazil. bianca.ambrogi@gmail.com.
Exp Appl Acarol ; 74(3): 261-274, 2018 Mar.
Article em En | MEDLINE | ID: mdl-29478090
Upon damage by herbivores, plants induce an array of volatile organic compounds (VOCs) that mediate ecological interactions involving communication with organisms of the second and third trophic levels. VOC-mediated tritrophic interactions have largely been studied in various systems, including cassava (Manihot esculenta), but little is known about the chemical nature of herbivore-induced VOCs in this crop and the response they evoke in natural enemies. Several tetranychid and predatory mites are associated with cassava. Here, VOC emissions from uninfested plants and plants infested with 200 or 400 Mononychellus tanajoa, a specialist herbivore on cassava, and the generalists Tetranychus urticae and T. gloveri were measured. Dual-choice experiments were also conducted to assess the preference of inexperienced (reared on prey-infested bean plants) and experienced (adapted on prey-infested cassava plants) predatory mites, Neoseiulus idaeus (Phytoseiidae), between odors of uninfested plants versus odors of plants infested with M. tanajoa, T. urticae or T. gloveri. Two hundred individuals significantly increased the emissions of (Z)-3-hexen-1-ol, (E)-ß-ocimene, ß-caryophyllene, alloaromadendrene and (E)-geranyl acetone in T. urticae-infested plants, and (E)-ß-ocimene and methyl salicylate (MeSA) in T. gloveri-infested plants. Four hundred individuals significantly increased the emissions of (Z)-3-hexen-1-ol, MeSA, α-pinene and D-limonene in M. tanajoa-infested plants. In addition, T. urticae at this density induced (E)-ß-ocimene, D-limonene, (E)-geranyl acetone and six compounds that were not detected in other treatments. Tetranychus gloveri-infested plants induced the emissions of (E)-2-hexenal and D-limonene. Regardless of the infesting species, inexperienced N. idaeus did not discriminate between uninfested or infested plants. Upon experience, they discriminated between the odors of uninfested and T. urticae-damaged plants. Our findings reveal that mite infestations in cassava result in density-dependent and species-specific emission of VOCs, and that N. idaeus relies on associative learning to forage for its prey.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Comportamento Predatório / Manihot / Cadeia Alimentar / Sinais (Psicologia) / Compostos Orgânicos Voláteis / Ácaros Limite: Animals Idioma: En Revista: Exp Appl Acarol Assunto da revista: BIOLOGIA / PARASITOLOGIA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Comportamento Predatório / Manihot / Cadeia Alimentar / Sinais (Psicologia) / Compostos Orgânicos Voláteis / Ácaros Limite: Animals Idioma: En Revista: Exp Appl Acarol Assunto da revista: BIOLOGIA / PARASITOLOGIA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda