巴西热带草原所产水果富含抗氧化剂

Native Brazilian fruits grown in arid¹（干旱的） climates and poor soil have similar antioxidant activity to conventionally grown Red Delicious apples, according to research published August 21 in the open access journal PLOS ONE by Sandra Fernandes Arruda from the University of Brazil and colleagues from other institutions. Twelve fruit species grown on the Cerrado, a savanna²（热带草原） with acidic soils, were compared to conventional Red Delicious apples purchased at local markets; the researchers found that several of these native species had higher proportions of bioactive compounds and pigments³ than the apples. The proportion of these compounds correlated with antioxidant properties of the fruit extracts when experimentally tested. Based on these results, the authors conclude that native fruits grown in sub-optimal conditions can confer similar nutritional⁴ benefits to apples, which are considered among the most antioxidant-rich foods.   The fruits studied here include indigenous⁵（本土的） species such as lobeira, also called 'wolf apple', tucum, a variety of palm, and other fruits which grow in the arid climate and poor soil of the Cerrado. Though commonly consumed fruits like apples or strawberries have been extensively studied for their chemical constituents⁶, the nutritional benefits of fruits grown in such conditions are not well-known. The authors conclude, "Such fruits can provide a source of new bioactive compounds with functional⁷ properties beneficial to health, which should stimulate⁸ the pharmaceutical⁹ and food industries for the development of new products, promoting the sustainable development of regions with the characteristics of the Cerrado."