Tyagi Akanksha, Lim Min-Jin, Kim Nam-Hyeon, Barathikannan Kaliyan, Vijayalakshmi Selvakumar, Elahi Fazle, Ham Hun-Ju, Oh Deog-Hwan
Department of Food Science and Biotechnology, College of Agriculture and Life Sciences, Kangwon National University, Chuncheon 200-701, Korea.
Agricultural and Life Science Research Institute, Kangwon National University, Chuncheon 24341, Korea.
Antioxidants (Basel). 2022 Apr 25;11(5):839. doi: 10.3390/antiox11050839.
In recent years, the health benefits of the pigmented rice varieties have been reported due to the richness of their bioactive compounds. Therefore, this study evaluated the antioxidant, total flavonoid, total phenolic, anthocyanin content, amino acid and individual phenolic compound quantification of nine Korean-grown rice varieties using spectrophotometric, HPLC-FLD-MS/MS and UHPLC Q-TOF-MS/MS methods. Our research found that the free fractions of DM29 (red rice) had the highest free radical scavenging ability of ABTS and DPPH. In contrast, the highest ferric reducing antioxidant power was observed in the 01708 brown rice variety. The majority of phenolic compounds such as quercetin, ferulic acid, p-coumaric acid, ascorbic acid, caffeic acid and genistein were found in the DM29 sample. The phenolic content of rice varies depending on its color, with DM29 red rice having the highest TPC, TFC and TAC levels. At the same time, the presence of the majority of amino acids was quantified in the 01708 and GR (Gangwon) brown rice varieties. According to this study, colored rice varieties are high in amino acids, phenolic compounds and antioxidants. This research would be beneficial in furthering our understanding of the nutritional value of different colors of rice and their high potential as a natural antioxidant.
近年来，由于其生物活性化合物丰富，有色水稻品种对健康有益的特性已见报道。因此，本研究采用分光光度法、HPLC-FLD-MS/MS和UHPLC Q-TOF-MS/MS方法，对9个韩国种植的水稻品种的抗氧化剂、总黄酮、总酚、花青素含量、氨基酸和单个酚类化合物进行了定量分析。我们的研究发现，DM29（红米）的游离级分对ABTS和DPPH的自由基清除能力最高。相比之下，在01708糙米品种中观察到最高的铁还原抗氧化能力。在DM29样品中发现了大多数酚类化合物，如槲皮素、阿魏酸、对香豆酸、抗坏血酸、咖啡酸和染料木黄酮。水稻的酚类含量因其颜色而异，DM29红米的总酚含量（TPC）、总黄酮含量（TFC）和总花青素含量（TAC）最高。同时，在01708和GR（江原道）糙米品种中对大多数氨基酸的存在进行了定量分析。根据本研究，有色水稻品种富含氨基酸、酚类化合物和抗氧化剂。这项研究将有助于我们进一步了解不同颜色水稻的营养价值及其作为天然抗氧化剂的巨大潜力。
