植物不同部位的化学成分估算及抗氧化活性分析

Pankaj Singh, Rasna Gupta, Shikha Shukla, Ankit Gupta, Ram Lakhan Singh
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摘要

氧化应激是指活性氧(ROS)的产生与抗氧化防御系统之间的平衡受到干扰,导致自由基诱导的疾病。本研究的目的是对植物不同部位的化学物质进行定量分析,并探讨植物叶(CFL)、种子(CFS)和树皮(CFB)乙醇提取物的抗氧化活性,以揭示其治疗作用。通过自由基清除活性(FRSA)、超氧阴离子自由基清除活性(SARSA)、还原能力(RP)、脂质过氧化(LPO)、羟基自由基清除活性(HRSA)和硫氰酸铁活性(FTC)来评价植物各部位的抗氧化能力。以槲皮素为标准物测定其抗氧化活性。在各植物提取物中,CFB的总酚类物质和蛋白质含量高于CFS和CFL, CFL的抗坏血酸、类胡萝卜素和碳水化合物含量高于CFB和CFS。结果表明,CFB对FRSA (35.48 μg/ml)、LPO (91.91 μg/ml)、HRSA (106.87 μg/ml)和FTC (53.21 μg/ml)的ic值最低。CFS对SARSA的IC最低(24.54 μg/ml), RP最高(2.14 ASE/ml)。总之,树皮可能是一种潜在的天然抗氧化剂来源的食品和医药应用。
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Estimation of phytochemical constituents and analysis of antioxidant activity in different parts of plant
Oxidative stress is defined as a condition in which the balance between the production of reactive oxygen species (ROS) and the antioxidant defense system gets disturbed and causes free radical induced diseases. The current research was aimed to carrying out quantification of phytochemicals in different parts of and explores the antioxidant activities of ethanolic extracts of leaf (CFL), seed (CFS), and bark (CFB) to show their therapeutic importance. The antioxidant potential of plant parts was assessed by free radical scavenging activity (FRSA), superoxide anion radical scavenging activity (SARSA), reducing power (RP), lipid peroxidation (LPO), hydroxyl radical scavenging activity (HRSA), and ferric thiocyanate activity (FTC). Quercetin was used as a standard to measure the antioxidant activity. Among the tested plant extracts, CFB had the highest total phenolics and protein content than those of CFS and CFL, whereas CFL had the highest ascorbic acid, carotenoids and carbohydrate content than CFB and CFS plant parts. Antioxidant assay showed CFB had the lowest ICvalue for FRSA (35.48 μg/ml), LPO (91.91 μg/ml), HRSA (106.87 μg/ml) and FTC (53.21 μg/ml). CFS showed the lowest IC for SARSA (24.54 μg/ml) and the highest RP (2.14 ASE/ml). Overall, the bark of could be a potential natural antioxidant source for food as well as pharmaceutical applications.
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