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[en] The purpose of this study is the evaluation of flavor profiles of monovarietal virgin olive oils (VOO) produced in the Oriental region of Morocco via the characterization of volatile compounds, using SPME-GC/MS technique, and the determination of total phenolic content (colorimetric method). The study concerns oils of three European olive cultivars (Arbosana, Arbequina and Koroneiki) which were recently introduced in Morocco under irrigated high-density plantation system. GC/MS aroma profiles of analyzed VOOs showed the presence of 35 volatile compounds. The major compounds in such oils are C6 compounds produced from linoleic and linolenic acids via lipoxygenase pathway such as trans-2-hexenal, cis-2-hexenal, cis-3-hexen-1-ol, trans-3-hexen-1-ol, trans-3-hexen-1-ol acetate, hexanal and 1-hexanol in
different proportions depending on the cultivar (p<0.05). In addition, statistical analyses indicate that the analyzed VOOs have different aroma profiles. Arbequina oil has a high proportion of compounds with sensory notes “green” and “sweet” giving it a fruity sensation compared to Arbosana and Koroneiki. In parallel, Arbosana and Koroneiki oils are rich in phenolic compounds and provide relatively bitter and pungent tastes to these oils. [fr] Le but de cette étude vise l’évaluation des profils organoleptiques des huiles d’olivevierges monovariétales produites dans la région orientale du Maroc par la caractérisation des composés
volatils et la détermination de la teneur en phénols totaux. Il s’agit d’huiles d’olive de trois cultivars d’origine européenne (Arbequina, Arbosana et Koroneiki) récemment introduites au Maroc en irriguée super-intensif. Les profils aromatiques obtenus par GC/MS des huiles analysées montrent la présence de 35 composés volatils. Les principaux composés présents dans ces huiles sont les composés C6, tels que le trans-2-hexénal, le cis-2-hexènal, le cis-3-hexén-1-ol, le trans-3-hexén-1-ol, l’acétate de trans-3-hexén-1-ol, le 1-héxanol et l’hexanal à des proportions différentes selon le cultivar (p<0,05). En outre, les analyses statistiques indiquent que les huiles analysées ont des profils aromatiques différents. L’huile d’Arbéquina présente une forte proportion des composés offrant des notes sensorielles « vert » et « sucré »
lui conférant une sensation de fruité par rapport à l’Arbosana et Koroneiki. En parallèle, les huiles Arbosana et Koroneiki sont riches en composés phénoliques et apportent des goûts relativement amer et piquant à ces huiles.
Mansouri, Farid; Université Mohammed Premier, Oujda (Maroc) > Faculté des Sciences > Laboratory of Plants & Microorganisms Biology
Ben Moumen, Abdessamad; Université Mohammed Premier > Faculté des Sciences Oujda > Laboratory of Plants & Microorganisms Biology
Richard, Gaetan ; Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie générale et organique
Fauconnier, Marie-Laure ; Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie générale et organique
Sindic, Marianne ; Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Laboratoire Qualité et sécurité des produits agro-aliment.
Serghini-Caid, Hana; Université Mohammed Premier > Faculté des Sciences Oujda > Laboratory of Plants & Microorganisms Biology
Elamrani, Ahmed; Université Mohammed Premier > Faculté des Sciences Oujda > Laboratory of Plants & Microorganisms Biology
Language :
English
Title :
Flavor profiles of monovarietal virgin olive oils produced in the Oriental region of Morocco
Alternative titles :
[fr] Profils organoleptiques d’huiles d’olive vierges monovariétales produites dans la région orientale du Maroc
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