Klensporf-Pawlik Dorota, Przybylski Roman
Department of Food Commodity Science, Poznań University of Economics, Poland.
Department of Chemistry and Biochemistry, University of Lethbridge, Canada.
Acta Sci Pol Technol Aliment. 2015 Oct-Dec;14(4):357-366. doi: 10.17306/J.AFS.2015.4.35.
Canadian prairies are a habitat for unique wild plants. The main object of the present study was to investigate phytochemicals content and antioxidant activity in seven wild Canadian prairie fruits.
The presence of total phenolics, flavonoids, anthocyanins and antioxidant activity were identified in the extracts according to standard procedure.
Wild rose had the highest amounts of total phenolics and total flavonoids, whereas elderberry exhibited the highest amount of anthocyanins. All extracts showed good scavenging activities towards DPPH radicals. The results showed a good linear relationship between oxygen radical absorbance capacity and total phenolics indicating that radicals are scavenged at a greater rate as the total phenolics content increases. Additionally, all extracts when applied at concentration of 800 ppm, showed ability to inhibit oxidation of canola oil. In SOT test the best results were obtained when extract of American mountain ash was used. In general, wild rose followed by American mountain ash demonstrated the highest antioxidant activity among assessed Canadian prairie fruits.
From the results it can be concluded that prairie fruit extracts are a rich source of phenolic compounds and poses a high antioxidant activity, confirmed by assessment with different type of radicals employed.
加拿大大草原是独特野生植物的栖息地。本研究的主要目的是调查加拿大七种野生草原水果中的植物化学成分含量和抗氧化活性。
按照标准程序鉴定提取物中总酚、黄酮类化合物、花青素的含量以及抗氧化活性。
野玫瑰的总酚和总黄酮含量最高，而接骨木果的花青素含量最高。所有提取物对DPPH自由基均表现出良好的清除活性。结果表明，氧自由基吸收能力与总酚之间存在良好的线性关系，这表明随着总酚含量的增加，自由基的清除速率更快。此外，所有提取物在浓度为800 ppm时，均表现出抑制菜籽油氧化的能力。在SOT试验中，使用花楸提取物时获得了最佳结果。总体而言，在评估的加拿大草原水果中，野玫瑰其次是花楸表现出最高的抗氧化活性。
从结果可以得出结论，草原水果提取物富含酚类化合物，并具有高抗氧化活性，这通过使用不同类型自由基的评估得到了证实。
