Wang Xiaohan, Li Bing, Sun Shanshan, Liu Qingqing, Zhu Jin, Zhou Xian, Zhang Huijin, Wu Qian, Wang Liangsheng
Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; China National Botanical Garden, Beijing 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Botanical Garden, Shanghai 201602, China.
Food Chem. 2023 Jul 30;415:135756. doi: 10.1016/j.foodchem.2023.135756. Epub 2023 Feb 24.
Antique Lotus (Nelumbo) is a perennial aquatic plant with unique historical significance and cultural value, whereas its potential economic value hasn't been fully explored. The present study showed that lotus seedpods had significantly higher antioxidant capacity than other parts by FRAP, ABTS, and ORAC assays and analyzed the proanthocyanidins and flavonols in the seedpods of Antique Lotus. Polyphenols contributed to great antioxidant activity and 51 polyphenols were identified by UPLC-TQ-MS analysis. In which, 27 compounds were identified from lotus seedpods for the first time, including 20 trimers, 5 dimers and 2 tetramers of proanthocyanidin. Total proanthocyanidins explained 70%-90% of the different antioxidant activities and the content of proanthocyanidin trimers showed the strongest correlations with the antioxidant activities. This study provided a fundamental reference for the research of polyphenols in lotus and found that Antique Lotus seedpod extracts have the promising prospects of additives used in feed and food processing.
古莲（Nelumbo）是一种具有独特历史意义和文化价值的多年生水生植物，但其潜在的经济价值尚未得到充分发掘。本研究通过FRAP、ABTS和ORAC分析表明，莲蓬的抗氧化能力显著高于其他部位，并对古莲莲蓬中的原花青素和黄酮醇进行了分析。多酚类物质具有很强的抗氧化活性，通过超高效液相色谱-串联四极杆质谱（UPLC-TQ-MS）分析鉴定出51种多酚类物质。其中，从莲蓬中首次鉴定出27种化合物，包括20种原花青素三聚体、5种二聚体和2种四聚体。总原花青素解释了70%-90%的不同抗氧化活性，原花青素三聚体的含量与抗氧化活性的相关性最强。本研究为莲子多酚的研究提供了基础参考，并发现古莲莲蓬提取物在饲料和食品加工中作为添加剂具有广阔的应用前景。
