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

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Malheiro, R (Author) Other; Susana Casal (Author) FFUP; Cunha, SC (Author) Other; Baptista, P (Author) Other; Pereira, JA (Author) Other

Journal

Title: Phytochemistry

Vol. 121

Pages: 11-19

ISSN: 0031-9422

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 26 Citations

Scopus - 27 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9