Abstract
Abstract The aim of this study was to evaluate the influence of organic and conventional cultivation systems and the cultivars on the postharvest quality, antioxidant activity and acceptability of strawberries. Strawberries of the cultivars Albion, Monterey and San Andreas were analysed with respect to the soluble solids content (SS), titratable acidity (TA), SS/TA ratio, fruit colour, vitamin C content, antioxidant activity by the DDPH method, mineral composition and acceptability. The cultivation systems and cultivars had different influences on the SS, TA, pH, SS/TA and colour of the strawberries. The vitamin C content of cv. Monterey was higher (78.68 mg ascorbic acid 100 g-1) than that of cv. San Andreas (70.28 mg ascorbic acid 100 g-1) in the conventional system, while in the organic system, the cultivars did not differ. Differences were not observed amongst the cultivars and cultivation conditions for antioxidant activity and the cultivation systems and cultivars had no effect on the P, Cu and Mg mineral contents. The conventionally cultivated strawberries of cv. Monterey obtained the highest value for acceptance (7.51) while the organically cultivated strawberries of cv. San Andreas received the lowest value (6.58).
Highlights
O objetivo deste estudo foi avaliar a influência dos sistemas de cultivo, orgânico e convencional, e também de cultivares sobre a qualidade pós-colheita, atividade antioxidante e aceitabilidade de frutos de morango
The SS content was higher in the organic system than in the conventional for Albion and Monterey but did not differ for San Andreas (Table 1)
Monterey strawberries showed the lowest acidity (0.62% citric acid) when cultivated in the conventional system, but did not differ from the other cultivars when cultivated in the organic system
Summary
O objetivo deste estudo foi avaliar a influência dos sistemas de cultivo, orgânico e convencional, e também de cultivares sobre a qualidade pós-colheita, atividade antioxidante e aceitabilidade de frutos de morango. Com relação aos sistemas de cultivo e as cultivares, os mesmos não tiveram efeito sobre o teor dos minerais P, Cu e Mg. Os frutos de morango da cv. Palavras-chave: Fragaria x ananassa; Vitamina C; Composição mineral; Método de DPPH; Sólidos solúveis. Strawberries (Fragaria x ananassa, Rosaceae) are considered important sources of bioactive compounds, with antioxidant activity (YANG et al, 2016) due to the presence of flavonoids, such as anthocyanins, hydrolysable tannins and phenolic compounds, as well as ascorbic acid (vitamin C), pigments and folate (CEREZO et al, 2010)
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