Identification of leaf volatiles from olive (Olea europaea) and their possible role in the ovipositional preferences of olive fly, Bactrocera oleae (Rossi) (Diptera: Tephritidae)

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

Malheiro, R (Autor) Outra; Susana Casal (Autor) FFUP; Cunha, SC (Autor) Outra; Baptista, P (Autor) Outra; Pereira, JA (Autor) Outra

Revista

Título: Phytochemistry

Vol. 121

Páginas: 11-19

ISSN: 0031-9422

Editora: Elsevier

Indexação

ISI Web of Knowledge - 26 Citações

Scopus - 27 Citações

Outras Informações

ID Authenticus: P-00G-WS5

DOI: 10.1016/j.phytochem.2015.10.005

Abstract (EN): The olive fly, Bactrocera oleae (Rossi), is a monophagous pest that displays an oviposition preference among cultivars of olive (Olea europaea L.). To clarify the oviposition preference, the olive leaf volatiles of three olive cultivars (Cobrancosa, Madural and Verdeal Transmontana) were assessed by headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME-GC/MS) at six different periods of olive fruit maturation and degrees of infestation. A total of 39 volatiles were identified, mainly esters and alcohols, with a minor percentage of aldehydes, ketones and terpenic compounds, including sesquiterpenes. At sampling dates with higher degrees of infestation, cv. Cobrancosa had, simultaneously, significantly lower infestation degrees and higher volatile amounts than the other two cultivars, with a probable deterrent effect for oviposition. The green leaf volatiles (GLVs) (Z)-3-hexen-1-ol and (Z)-3-hexen-1-ol acetate) were the main compounds identified in all cultivars, together with toluene. The abundance of GLVs decreased significantly throughout maturation, without significant differences among cultivars, while toluene showed a general increase and positive correlation with olive fly infestation levels. The results obtained could broaden our understanding of the roles of various types and amounts of olive volatiles in the environment, especially in olive fly host selection and cultivar preference.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9