Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/22483
Tipo: Artigo
Título: Induced responses of Coffea arabica to attack of Coccus viridis stimulate locomotion of the herbivore
Autor(es): Fernandes, Flávio Lemes
Picanço, Marcelo Coutinho
Gontijo, Pablo Costa
Fernandes, Maria Elisa de Sena
Pereira, Eliseu José Guedes
Semeão, Altair Arlindo
Abstract: The green scale, Coccus viridis (Green) (Hemiptera: Coccidae), is an insect pest of coffee and several other perennial cultivated plant species. We investigated changes in alkaloid and phenolic contents in coffee plants as a response to herbivory by this insect. Greenhouse‐grown, 11‐month‐old coffee plants were artificially infested with the coccid and compared with control, uninfested plants. Leaf samples were taken at 15, 30, 45, and 60 days after infestation, and high‐performance liquid chromatography was used to identify and quantify alkaloid and phenolic compounds induced by the coccids at each sampling date. Of the compounds investigated, caffeine was the main coffee alkaloid detected in fully developed leaves, and its concentration in infested plants was twice as high as in the control plants. The main coffee phenolics were caffeic and chlorogenic acid, and a significant increase in their concentrations occurred only in plants infested by C. viridis. A positive and significant relationship was found between alkaloid and phenolic concentrations and the infestation level by adults and nymphs of C. viridis. Caffeine and chlorogenic acid applied on coffee leaves stimulated the locomotory activity of the green scale, thus reducing their feeding compared to untreated leaves. This is the first study to show increased levels of coffee alkaloids and phenolics in response to herbivory by scale insects. The elevation of caffeine and chlorogenic acid levels in coffee leaves because of C. viridis infestation seems to affect this generalist insect by stimulating the locomotion of crawlers.
Palavras-chave: Coffee
Green scale
Phytosuccivorous insects
Caffeine
Alkaloids
Phenolics
Toxicity
Behavior
Hemiptera
Coccidae
Editor: Entomologia Experimentalis et Applicata
Tipo de Acesso: Open Access
URI: https://doi.org/10.1111/j.1570-7458.2011.01113.x
http://www.locus.ufv.br/handle/123456789/22483
Data do documento: 11-Abr-2011
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