Department of Agrofood Resources, NAAS, RDA, 88-2, Seodun-dong, Gwonseon-gu, Suwon-si, Gyeonggi 441-853, Korea.
Nutr Res Pract. 2012 Aug;6(4):277-85. doi: 10.4162/nrp.2012.6.4.277. Epub 2012 Aug 31.
The purposes of this study were to determine phenolic compounds and to evaluate antioxidant activities of plums (Soldam, Oishiwase and Formosa). Soldam contains the highest amount of total phenolics among cultivars (Formosa: 4.0%, Oishiwase: 3.3%, Soldam: 6.4% for total phenolic) as well as the total flavonoids of which constituents were mainly myricetin and anthocyanidin. The antioxidant activities were measured by DPPH, ABTS radical scavenging, and SOD-like activities. The DPPH radical scavenging activity of Korean plum extracts (200 µg/mL) showed more than 43%, and the Soldam turned out to be the highest : ID(50) value: 160-177 µg/mL for Formosa and Oishiwase; 58-64 µg/mL for Soldam. The ABTS radical scavenging activity of Korean plum extracts (200 µg/mL) was found to be more than 50%. The SOD-like activity of Korean plum extracts (200 µg/mL) showed more than 70%. Among three kinds of cultivars, Soldam had the highest antioxidant activity. The nitrite scavenging activity of Soldam was 61.5%, which is the highest, compared with that of the other cultivars, about 50%. From these results, Korean plums turned out to be phytochemical rich fruit as well as to show high antioxidant activities.
本研究旨在确定李子（Soldam、Oishiwase 和 Formosa）中的酚类化合物并评估其抗氧化活性。Soldam 中的总酚含量（Formosa：4.0%、Oishiwase：3.3%、Soldam：6.4%）以及总类黄酮含量最高，其成分主要为杨梅素和花青素。抗氧化活性通过 DPPH、ABTS 自由基清除和 SOD 样活性来衡量。韩国李提取物（200μg/mL）的 DPPH 自由基清除活性超过 43%，其中 Soldam 的活性最高：ID(50)值为 Formosa 和 Oishiwase 的 160-177μg/mL；Soldam 的为 58-64μg/mL。韩国李提取物（200μg/mL）的 ABTS 自由基清除活性超过 50%。韩国李提取物（200μg/mL）的 SOD 样活性超过 70%。在这三种品种中，Soldam 的抗氧化活性最高。Soldam 的亚硝酸盐清除活性为 61.5%，是最高的，而其他品种的清除活性约为 50%。从这些结果可以看出，韩国李不仅富含植物化学物质，而且具有很高的抗氧化活性。
