Volatile extraction from soybean plants infested with several herbivores

Autores

  • Dalila Dominique Duarte Rocha Universidade Federal de São João Del Rei
  • Marcos Antônio Matiello Fadini Universidade Federal de São João Del Rei
  • Otávio Augusto Carvalho de Souza Universidade Federal de São João Del Rei
  • Rodinei Augusti Universidade Federal de Minas Gerais
  • Julio Onesio Ferreira Melo Universidade Federal de São João Del Rei http://orcid.org/0000-0002-7483-0942

DOI:

https://doi.org/10.15361/1984-5529.2019v47n4p358-363

Resumo

The oral secretion of herbivores triggers chemical defenses in plants. When subjected to simultaneous or se­quential attack by herbivores, plants emit volatile compounds of varying chemical nature, which can interfere with the attraction of natural enemies. This study investigates the profile of volatile compounds emitted by transgenic soybean (Bt M6210 IPRO) plants infested with Tetranychus urticae Koch (Acari: Tetranychidae) and Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae). To this end, we used a method without leaf maceration. For plant infestation, 100 T. urticae mites per plant were used for one day and, subsequently, 2 A. gemmatalis caterpillars for 36 hours. Volatile compounds produced after infestation were analyzed by gas chromatography coupled with mass spectrometry. Principal component analysis showed differences between groups of compounds and explained 77.5% of the variation in volatiles. There are chemical differences between the emission of compounds according to the type of herbivory. It is concluded that soybean plants infested in a single (T. urticae) or multiple (T. urticae followed by A. gemmatalis) way trigger the production of volatile compounds that can be used as chemical traces to direct the foraging of natural enemies. The possible functions of volatiles produced after herbivory are discussed.

Biografia do Autor

Dalila Dominique Duarte Rocha, Universidade Federal de São João Del Rei

Mestre em Ciências Agrárias

Marcos Antônio Matiello Fadini, Universidade Federal de São João Del Rei

Docente da Universidade Federal de São João Del Rei

Otávio Augusto Carvalho de Souza, Universidade Federal de São João Del Rei

Discente do curso de Engenharia de Alimentos

Rodinei Augusti, Universidade Federal de Minas Gerais

Docente do Departamento de Química da Universidade Federal de Minas Gerais

Julio Onesio Ferreira Melo, Universidade Federal de São João Del Rei

Doutor em Ciências Químcia, pesquisador nas áreas de análises ambientais e estudos de compostos voláteis e fixos com atividade bioativa em planta.

Publicado

12/11/2019

Edição

Seção

Entomologia - Entomology