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Assessment of total polyphenols antioxidants and antimicrobial properties of aonla varieties

机译:评估aonla品种的总多酚抗氧化剂和抗菌特性

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摘要

Phenolic content, antioxidant activities and antimicrobial activities of methanolic, ethanolic and ethyl acetate extracts of five different varieties of aonla (Emblica officinalis) fruits as well their powders were evaluated. Total polyphenolic content in fresh aonla fruit extracts varied from 70.6 to 159.4 mg GAE/g and their EC 50 (effective concentration) values for antioxidant activity ranged from 46.72 to 359.7 µg/ml. Significant varietal difference were observed in antioxidant activity of the extracts of fresh aonla fruit and powder. Among the variety analyzed, Desi variety exhibited significantly higher TPC (total polyphenol content) and antioxidant activity in fresh as well as dried form in all the extracts. Methanolic extracts of various varieties had maximum TPC and antioxidant activity. Variety NA-7 showed high TPC and antioxidant activity. Almost, similar trend was observed among the extracts of aonla powders for TPC and AOA (antioxidant activity). A high positive correlation coefficient existed between TPC and AOA of different aonla extracts. All the extracts analyzed, exhibited a strong antimicrobial potential against E. coli, Salmonella typhi, Staphylococcus aureus and Candida albicans. This study suggests aonla as potential natural source of antioxidants and antimicrobial agents.Electronic supplementary materialThe online version of this article (doi:10.1007/s13197-016-2282-0) contains supplementary material, which is available to authorized users.
机译:评价了五个不同品种的Aonla(Emblica officinalis)水果的甲醇,乙醇和乙酸乙酯提取物的酚含量,抗氧化活性和抗菌活性,以及​​它们的粉末。新鲜的Aonla水果提取物中的总多酚含量在70.6至159.4 mg GAE / g之间,其抗氧化活性的EC 50(有效浓度)值在46.72至359.7 µg / ml之间。在新鲜的Aonla水果和粉末的提取物中,抗氧化活性存在明显的品种差异。在所分析的品种中,Desi品种在所有提取物中的新鲜和干燥形式均表现出较高的TPC(总多酚含量)和抗氧化活性。各种品种的甲醇提取物具有最大的TPC和抗氧化活性。品种NA-7具有较高的TPC和抗氧化活性。在用于TPC和AOA的aonla粉末提取物中几乎观察到了类似的趋势(抗氧化活性)。不同芦荟提取物的TPC和AOA之间存在较高的正相关系数。分析的所有提取物均对大肠杆菌,伤寒沙门氏菌,金黄色葡萄球菌和白色念珠菌具有强大的抗菌潜力。这项研究表明aonla是抗氧化剂和抗菌剂的潜在天然来源。电子补充材料本文的在线版本(doi:10.1007 / s13197-016-2282-0)包含补充材料,授权用户可以使用。

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