Padhan Bandana, Nayak Jayanta Kumar, Panda Debabrata
1Department of Biodiversity and Conservation of Natural Resources, Central University of Orissa, Koraput, Odisha 764021 India.
2Department of Anthropology, Central University of Orissa, Koraput, Odisha 764021 India.
J Food Sci Technol. 2020 Jun;57(6):2370-2376. doi: 10.1007/s13197-020-04470-x. Epub 2020 Apr 29.
Modern research is directed towards finding naturally-occurring antioxidants of plant origin for improving nutrition and health benefit. Wild yam species are used as indigenous food and medicine by various tribal groups of Koraput, India. However, detailed analysis of health promoting bioactive compounds and antioxidant properties are lacking. The present study aims to evaluate the flavonoid, total antioxidant capacity and in vitro antioxidant activity of different wild and cultivated species of Koraput. The extract of these tuber was screened for its potential antioxidant activities by various tests, such as DPPH, nitric oxide, superoxide and ABTS radical cation assay. The phenol, flavonoid and total antioxidant capacity of the samples were ranged from 2.19 to 9.62 mg g dry weight, 0.62-0.85 mg g dry weight and 1.63-5.59%, respectively. The IC values were 77.9-1164, 101.2-1031.6, 27.0-1022.6 and 47.1-690 µg ml for DPPH, ABTS, superoxide and nitric oxide scavenging activity, respectively. Taken together, some wild yam species such as , and had significantly higher flavonoids content and antioxidant capacity along with the lower IC values than the standards in compared to the other species. The present studies confirmed that some wild yam tubers have superior potential for scavenging deleterious free radicals effectively. Results indicated that these wild yam species should be promoted as natural source of antioxidants.
现代研究致力于寻找天然存在的植物源抗氧化剂，以改善营养和促进健康。印度科拉普特的各个部落群体将野生山药品种用作本土食物和药物。然而，目前缺乏对其促进健康的生物活性化合物和抗氧化特性的详细分析。本研究旨在评估科拉普特不同野生和栽培山药品种的类黄酮、总抗氧化能力和体外抗氧化活性。通过各种测试，如DPPH、一氧化氮、超氧阴离子和ABTS自由基阳离子测定法，对这些块茎的提取物进行潜在抗氧化活性筛选。样品中的酚类、类黄酮和总抗氧化能力分别为2.19至9.62毫克/克干重、0.62 - 0.85毫克/克干重和1.63 - 5.59%。DPPH、ABTS、超氧阴离子和一氧化氮清除活性的IC值分别为77.9 - 1164、101.2 - 1031.6、27.0 - 1022.6和47.1 - 690微克/毫升。总体而言，与其他品种相比，某些野生山药品种，如[品种名称未给出]、[品种名称未给出]和[品种名称未给出]，具有显著更高的类黄酮含量和抗氧化能力，且IC值低于标准品。本研究证实，一些野生山药块茎具有有效清除有害自由基的卓越潜力。结果表明，这些野生山药品种应作为抗氧化剂的天然来源加以推广。
