Antioxidant activity and phenolic content of strawberry genotypes from Fragaria x ananassa

The aim of this study was to compare the value in phytochemicals and antioxidant activity of two genotypes of strawberry fruit (Fragario x ananassa, Duchesne, Rosaceae), one represented by the cultivated variety (cv) Tudla and the other one, Maletto, by a type selected in the mountain region of Etna (Italy), Moreover, we have considered the influence of soil on fruit quality. Total phenolic compounds and antocyanin content were determined by spectrophotometric methods. Phenolics, recovered from pulp juice, were determined by Folin-Ciocalteu method, whereas total anthocyanins were estimated by a pH differential method. Antioxidant activity was evaluated by DPPH and ORAC assays, using quercetin and Trolox as standard respectively. Our results indicate that the different genotypes of strawberries, in particular those cultivated in volcanic soil of the Etna mountain region, that we call Maletto strawberry, could be considered an important resource. They are a good source of antioxidants and could be used to prevent deleterious effects induced by free radicals. The scientific importance of these results may be significant for industry concerning food quality and disease prevention.