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2020-10-17

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cc-by (c) López-Yerena, Anallely et al., 2020
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/172664

Conservation of native wild ivory-white olives from the Medes Islands natural reserve to maintain virgin olive oil diversity

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https://doi.org/10.3390/antiox9101009

Abstract

Food diversity, and in particular genetic diversity, is being lost at an alarming rate. Protection of natural areas is crucial to safeguard the world's threatened species. The Medes Islands (MI), located in the northwest Mediterranean Sea, are a protected natural reserve. Wild olive trees also known as oleasters make up part of the vegetation of the Meda Gran island. Among them, in 2012, a wild albino ivory-white olive tree with fruit was identified. Fruits were collected from this tree and their seeds were first sown in a greenhouse and then planted in an orchard for purposes of ex situ preservation. Seven out of the 78 seedling trees obtained (12%) produced ivory-white fruits. In autumn 2018, fruits from these trees were sampled. Although the fruits had low oil content, virgin olive oil with unique sensory, physicochemical, and stability characteristics was produced. With respect to the polyphenols content, oleacein was the main compound identified (373.29 72.02 mg/kg) and the oleocanthal was the second most abundant phenolic compound (204.84 52.58 mg/kg). Regarding pigments, samples were characterized by an intense yellow color, with 12.5 4.6 mg/kg of chlorophyll and 9.2 3.3 mg/kg of carotenoids. Finally, oleic acid was the main fatty acid identified. This study explored the resources of the natural habitat of the MI as a means of enrichment of olive oil diversity and authenticity of this traditional Mediterranean food

Subject

Olivera, Oli d'oliva, Polifenols, Avaluació sensorial dels aliments, Medes, Illes (Catalunya), Varietats de plantes

Subject (English)

Olive, Olive oil, Polyphenols, Sensory evaluation of food, Medes Islands (Catalonia), Plant varieties

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Articles publicats en revistes (Nutrició, Ciències de l'Alimentació i Gastronomia)

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LÓPEZ-YERENA, Anallely, et al. Conservation of native wild ivory-white olives from the Medes Islands natural reserve to maintain virgin olive oil diversity. Antioxidants. 2020. Vol. 9, num. 10, pags. 1009. ISSN 2076-3921. [consulted: 16 of August of 2026]. Available at: https://hdl.handle.net/2445/172664

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