Zhu Jinyan, Wang Ruizhi, Zhang Yu, Lu Yanyao, Cai Shuo, Xiong Qiangqiang
Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology, Agricultural College of Yangzhou University, Yangzhou 225009, China.
Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China.
Metabolites. 2024 Feb 11;14(2):120. doi: 10.3390/metabo14020120.
Colored rice is richer in nutrients and contains more nutrients and bioactive substances than ordinary white rice. Moderate consumption of black (purple) rice has a variety of physiological effects, such as antioxidant effects, blood lipid regulation, and blood sugar control. Therefore, we utilized nontargeted metabolomics, quantitative assays for flavonoid and phenolic compounds, and physiological and biochemical data to explore the correlations between metabolites and the development of antioxidant characteristics in pigmented rice seeds. The findings indicated that, among Yangjinnuo 818 (YJN818), Hongnuo (HN), Yangchannuo 1 hao (YCN1H), and Yangzi 6 hao (YZ6H), YZ6H exhibited the highest PAL activity, which was 2.13, 3.08, and 3.25 times greater than those of YJN818, HN, and YCN1H, respectively. YZ6H likewise exhibited the highest flavonoid content, which was 3.8, 7.06, and 35.54 times greater than those of YJN818, HN, and YCN1H, respectively. YZ6H also had the highest total antioxidant capacity, which was 2.42, 3.76, and 3.77 times greater than those of YJN818, HN, and YCN1H, respectively. Thus, purple rice grains have stronger antioxidant properties than other colored rice grains. Receiver operating characteristic (ROC) curve analysis revealed that trans-3,3',4',5,5',7-hexahydroxyflavanone, phorizin, and trilobatin in the YZ6H, HN, and YCN1H comparison groups all had area under the curve (AUC) values of 1. Phlorizin, trans-3,3',4',5,5',7-hexahydroxyflavanone, and trilobatin were recognized as indices of antioxidant capability in colored rice in this research. This research adds to the understanding of antioxidant compounds in pigmented rice, which can increase the nutritional value of rice and promote the overall well-being of individuals. This type of information is of immense importance in maintaining a balanced and healthy diet.
有色米比普通白米营养更丰富，含有更多营养成分和生物活性物质。适量食用黑（紫）米具有多种生理作用，如抗氧化作用、调节血脂和控制血糖。因此，我们利用非靶向代谢组学、黄酮类和酚类化合物的定量测定以及生理生化数据，来探究有色水稻种子中代谢物与抗氧化特性发展之间的相关性。研究结果表明，在洋金糯818（YJN818）、红糯（HN）、洋灿糯1号（YCN1H）和扬子6号（YZ6H）中，YZ6H的苯丙氨酸解氨酶（PAL）活性最高，分别是YJN818、HN和YCN1H的2.13倍、3.08倍和3.25倍。YZ6H的类黄酮含量同样最高，分别是YJN818、HN和YCN1H的3.8倍、7.06倍和35.54倍。YZ6H的总抗氧化能力也最高，分别是YJN818、HN和YCN1H的2.42倍、3.76倍和3.77倍。因此，紫米粒的抗氧化特性比其他有色米粒更强。受试者工作特征（ROC）曲线分析显示，YZ6H、HN和YCN1H比较组中的反式-3,3',4',5,5',7-六羟基黄烷酮、根皮苷和三叶苷的曲线下面积（AUC）值均为1。在本研究中，根皮苷、反式-3,3',4',5,5',7-六羟基黄烷酮和三叶苷被视为有色米抗氧化能力的指标。本研究增进了对有色米中抗氧化化合物的了解，这可以提高大米的营养价值并促进个体的整体健康。这类信息对于保持均衡健康的饮食极为重要。
