title: Effect of Bactrocera oleae on phenolic compounds and antioxidant and antibacterial activities of two Algerian olive cultivars.
abstract: Bactrocera oleae, an olive fruit fly, is a major olive pest in Algeria. In this study, olives of two Algerian cultivars (Limli and Rougette de Métidja) with different degrees of infestation by the Bactrocera oleae fly (0%, not attacked; 100%, all attacked; and real %) were analysed. The influence of this pest on individual phenolic compounds (HPLC-DAD-FLD) and antioxidant profiles was ascertained. The antibacterial activity against 8 human enteropathogenic bacteria was also assessed. The results show that Rougette de Métidja, the cultivar with higher drupe size, was attacked to a greater degree than Limli, and the B. oleae attack caused a significant decrease in the total phenolic contents (>50%), including oleuropein, verbascoside, luteolin-7-O-glucoside, tyrosol and hydroxytyrosol. The antioxidant and antibacterial activities were highly correlated with the phenolic levels. Extracts from healthy olives were more effective against bacteria than those obtained from attacked olives. Globally, olive fly affected significantly the phenolic compounds of olives and their biological properties.
authors.affiliation: Laboratoire de Biochimie Appliquée, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia, 06000, Algérie.
authors.forename: Lynda
authors.initials: L
authors.lastname: Medjkouh
authors.affiliation: Laboratoire de Biochimie Appliquée, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia, 06000, Algérie.
authors.forename: Abderezak
authors.initials: A
authors.lastname: Tamendjari
authors.affiliation: REQUIMTE/LAQV, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Portugal. beatoliv@ff.up.pt.
authors.forename: Rita C
authors.initials: RC
authors.lastname: Alves
authors.affiliation: REQUIMTE/LAQV, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Portugal. beatoliv@ff.up.pt.
authors.forename: Mariana
authors.initials: M
authors.lastname: Araújo
authors.affiliation: REQUIMTE/LAQV, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Portugal. beatoliv@ff.up.pt.
authors.forename: M Beatriz P P
authors.initials: MB
authors.lastname: Oliveira
mesh_terms: D000462:Algeria; D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D000975:Antioxidants / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects; D005638:Fruit / Q000469:parasitology* / Q000592:standards; D031658:Olea; D000069463:Olive Oil / Q000737:chemistry / Q000592:standards; D010636:Phenols / Q000737:chemistry / Q000494:pharmacology*; D033621:Tephritidae
chemical_list: D000900:Anti-Bacterial Agents; D000975:Antioxidants; D000069463:Olive Oil; D010636:Phenols