CSIR-Central Food Technological Research Institute, Mysore, 570 020 Karnataka India.
J Food Sci Technol. 2015 Jan;52(1):383-90. doi: 10.1007/s13197-013-0993-z. Epub 2013 May 4.
In the present study, resveratrol content and antioxidant properties of underutilized fruits such as Jamun (Syzygium cumini L.), Jackfruit (Artocarpus heterophyllus) and Mulberry (Morus rubra) were investigated keeping Grape (Vitis vinifera) as a reference. Ethanol/water (80:20 v/v) extracts of different parts of fruit samples including skin, pulp and seeds were analyzed by HPLC and MS for the quantification of resveratrol. Total polyphenols, flavonoids, DPPH scavenging activity and total antioxidant capacity were also investigated. Among the samples analyzed, mulberry fruit (whole) showed highest resveratrol content (50.61 μg g(-1) dry weight) followed by jamun seed (34.87 μg g(-1) dry weight), jamun pulp (13.70 μg g(-1) dry weight) and skin of jamun (11.19 μg g(-1) dry weight). Jamun seed extract exhibited the highest polyphenol content (55.54 mg gallic acid equivalent g(-1) dry weight) and highest antioxidant property (IC50 value-0.40 mg ml(-1)). The results suggest that underutilized fruits high in resveratrol and other polyphenols can be used as functional beverages.
在本研究中，研究了被忽视的水果（如黑刺李（Syzygium cumini L.）、菠萝蜜（Artocarpus heterophyllus）和桑椹（Morus rubra））的白藜芦醇含量和抗氧化特性，以葡萄（Vitis vinifera）作为参考。通过 HPLC 和 MS 分析了不同水果部分（包括果皮、果肉和种子）的乙醇/水（80:20 v/v）提取物，以定量白藜芦醇。还研究了总多酚、类黄酮、DPPH 清除活性和总抗氧化能力。在所分析的样品中，桑椹（整果）的白藜芦醇含量最高（50.61 μg g(-1)干重），其次是黑刺李种子（34.87 μg g(-1)干重）、黑刺李果肉（13.70 μg g(-1)干重）和黑刺李果皮（11.19 μg g(-1)干重）。黑刺李种子提取物的多酚含量最高（55.54 mg 没食子酸当量 g(-1)干重），抗氧化性能最高（IC50 值为 0.40 mg ml(-1)）。结果表明，富含白藜芦醇和其他多酚的被忽视的水果可作为功能性饮料。
