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Cardenosa V.,Postharvest Technology and Agrifood Industry Area andalusian Institute of Agricultural and Fishering Research and Training IFAPA Alameda del Obispo | Barreira J.C.M.,Polytechnic Institute of Braganca | Barros L.,Polytechnic Institute of Braganca | Arenas-Arenas F.J.,IFAPA Centro del Llano | And 2 more authors.
Molecules | Year: 2015

Five sweet orange (Citrus sinensis Osbeck) varieties cultivated in Huelva (Spain) and picked at two seasons during two consecutive years, were characterized for their antioxidant activity (free radicals scavenging activity, reducing power and lipid peroxidation inhibition) and vitamin content (vitamin E and vitamin C). The effects induced by sweet orange variety and stage of maturity were comprehensively compared by applying 2-way ANOVA and linear discriminant analysis. The results indicated higher differences in antioxidant activity and vitamin contents in response to the effect of the harvesting season, when compared to the effect of sweet orange variety. Nevertheless, the results observed in 2012 showed less marked differences among the assayed sweet orange varieties. Either way, it might be concluded that oranges sampled in January show the highest antioxidant activity and vitamin contents. Furthermore, concerning the properties evaluated in this work, all sweet orange varieties represent good alternatives, except for Rhode Summer, which would not be the preferable choice as a target to enhance sweet orange overall characteristics. © 2015 by the authors; licensee MDPI. Source


Pradas I.,Postharvest Technology and Agrifood Industry Area andalusian Institute of Agricultural and Fishering Research and Training IFAPA Alameda del Obispo | Medina J.J.,Primary Production Area andalusian Institute of Agricultural and Fishering Research and Training IFAPA | Ortiz V.,Postharvest Technology and Agrifood Industry Area andalusian Institute of Agricultural and Fishering Research and Training IFAPA Alameda del Obispo | Moreno-Rojas J.M.,Postharvest Technology and Agrifood Industry Area andalusian Institute of Agricultural and Fishering Research and Training IFAPA Alameda del Obispo
Journal of Berry Research | Year: 2015

BACKGROUND: Strawberries are widely consumed in the world and an important source of health-promoting compounds, such as polyphenols. The nutritional quality as well as the phytochemical composition of strawberry fruits are known to be strongly influenced by genetic, environmental factors, ripeness at harvest, and storage conditions. OBJECTIVE: The nutritional quality and the phytochemical content of two new strawberry cultivars, namely 'Fuentepina' and 'Amiga', were evaluated. These novel cultivars were compared with 'Camarosa' and 'Candonga', the two most extended cultivars in Spain, and with 'Primoris', an emerging one. METHODS: The influence of genotype, stage of ripening and season on different properties as colour, firmness, acidity, soluble solids content, antioxidant capacity, and polyphenols profile were evaluated. RESULTS: Results showed significant effects of genotype, stage of ripening and season on the majority of the measured parameters. Thirty nine phenolic compounds were tentatively identified. Anthocyanins were the most abundant class of polyphenols in 'Amiga', 'Candonga', 'Camarosa' and 'Primoris' cultivars while more flavan-3-ols were recorded in 'Fuentepina'. CONCLUSIONS: 'Fuentepina' strawberries stand out for their pleasant flavour as a result of a high sugar/acid ratio and 'Amiga' strawberries may offer potential as a new promising cultivar due to its high firmness, good sugar/acid ratio and high content of phytochemicals. © 2015 - IOS Press and the authors. Source

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