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Miho H, Díez CM, Mena-Bravo A, Sánchez de Medina V, Moral J, Melliou E, Magiatis P, Rallo L, Barranco D, Priego-Capote F. Cultivar influence on variability in olive oil phenolic profiles determined through an extensive germplasm survey. Food Chem 2018; 266:192-199. [PMID: 30381176 DOI: 10.1016/j.foodchem.2018.06.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 05/25/2018] [Accepted: 06/03/2018] [Indexed: 11/16/2022]
Abstract
Despite the evident influence of the cultivar on olive oil composition, few studies have been devoted to exploring the variability of phenols in a representative number of monovarietal olive oils. In this study, oil samples from 80 cultivars selected for their impact on worldwide oil production were analyzed to compare their phenolic composition by using a method based on LC-MS/MS. Secoiridoid derivatives were the most concentrated phenols in virgin olive oil, showing high variability that was significantly due to the cultivar. Multivariate analysis allowed discrimination between four groups of cultivars through their phenolic profiles: (i) richer in aglycon isomers of oleuropein and ligstroside; (ii) richer in oleocanthal and oleacein; (iii) richer in flavonoids; and (iv) oils with balanced but reduced phenolic concentrations. Additionally, correlation analysis showed no linkage among aglycon isomers and oleocanthal/oleacein, which can be explained by the enzymatic pathways involved in the metabolism of both oleuropein and ligstroside.
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Affiliation(s)
- H Miho
- Department of Agronomy, Campus of Rabanales, University of Cordoba, Spain
| | - C M Díez
- Department of Agronomy, Campus of Rabanales, University of Cordoba, Spain
| | - A Mena-Bravo
- Department of Analytical Chemistry, Campus of Rabanales, University of Cordoba, Spain; Agroalimentary Excellence Campus (ceiA3), Campus of Rabanales, University of Cordoba, Spain; Maimonides Institute of Biomedical Research (IMIBIC), Reina Sofia University Hospital, Spain
| | - V Sánchez de Medina
- Department of Analytical Chemistry, Campus of Rabanales, University of Cordoba, Spain
| | - J Moral
- Department of Agronomy, Campus of Rabanales, University of Cordoba, Spain; Plant Pathology Department, University of California Davis, Davis, USA
| | - E Melliou
- Laboratory of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, University of Athens, Greece
| | - P Magiatis
- Laboratory of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, University of Athens, Greece
| | - L Rallo
- Department of Agronomy, Campus of Rabanales, University of Cordoba, Spain
| | - D Barranco
- Department of Agronomy, Campus of Rabanales, University of Cordoba, Spain
| | - F Priego-Capote
- Department of Analytical Chemistry, Campus of Rabanales, University of Cordoba, Spain; Agroalimentary Excellence Campus (ceiA3), Campus of Rabanales, University of Cordoba, Spain; Maimonides Institute of Biomedical Research (IMIBIC), Reina Sofia University Hospital, Spain.
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