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Título: | Carotenoid composition of strawberry tree (Arbutus unedo L.) fruits |
Autor: | Delgado-Pelayo, Raúl CSIC; Gallardo Guerrero, Lourdes CSIC ORCID ; Hornero-Méndez, Dámaso CSIC ORCID | Palabras clave: | Arbutus unedo HPLC–DAD LC–MS (APCI+) GC Carotenoids Xanthophyll esters Fatty acids |
Fecha de publicación: | 15-may-2016 | Editor: | Elsevier | Citación: | Food Chemistry 199: 165-175 (2016) | Resumen: | The carotenoid composition of strawberry tree (Arbutus unedo) fruits has been characterised in detail and quantified for the first time. According to the total carotenoid content (over 340 μg/g dw), mature strawberry tree berries can be classified as fruits with very high carotenoid content (>20 μg/g dw). (all-E)-Violaxanthin and 9Z-violaxanthin were found to be the major carotenoid pigments, accounting for more than 60%, responsible for the bright colour of the flesh of ripe fruits. In addition other 5,6-epoxide carotenoids, such as (all-E)-neoxanthin, (9′Z)-neoxanthin (all-E)-antheraxanthin and lutein 5,6-epoxide, together with (all-E)-lutein, (all-E)-zeaxanthin and (all-E)-β-carotene were found at high levels (>5–20 μg/g dw). The LC–MS (APCI+) analysis of the xanthophyll fraction in their native state (direct extract) revealed that most of them (>90%) were totally esterified with saturated fatty acids (capric, lauric, myristic, palmitic and stearic). Monoesters, homodiesters and heterodiesters of (all-E)-violaxanthin and 9Z-violaxanthin were the major pigments. | Descripción: | 41 páginas; 5 figuras; 1 tabla | Versión del editor: | http://dx.doi.org/10.1016/j.foodchem.2015.11.135 | URI: | http://hdl.handle.net/10261/126708 | DOI: | 10.1016/j.foodchem.2015.11.135 | ISSN: | 0308-8146 |
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