Phenolic contents and antioxidant activities in vitro of some selected Algerian plants

Dynamic Chiropractic

关键词: Antioxidant properties;    in vitro tests;    phenolics;    flavonoids;    proanthocyanidin;    Algerian plants.;   

DOI  :  10.5897/JMPR2014.5554

学科分类：医学（综合）

来源: MPA Media

【 摘 要 】

In order to find new sources of natural antioxidants, the methanolic extracts of eleven Algerian medicinal plants from eight botanical families were investigated for their in vitro antioxidant activity using total antioxidant capacity (TAC), reducing power, 2,2-diphenyl-1-picrylhydrazyl (DPPH), hydroxyl radical scavenging and β-carotene–linoleate bleaching. The total phenolic, flavonoid and proanthocyanidin contents were also measured. Most of these plants were analyzed for the first time for their antioxidant activities. Results showed that the plants Pistacia atlantica, Thymelaea microphylla and Marubium deserti exhibited higher phenolic content (133.74 to 285.95 mg gallic acid equivalents/g dry matter). The flavonoid and proanthocyanidin contents varied from 0.56 to 12.44 mg catechin equivalents/g dry matter and 1.42 to 25.02 mg catechin equivalents/g dry matter, respectively. The extracts were found to have different levels of antioxidant properties in the test models used. The medicinal plants with the highest antioxidant activities were P. atlantica, Helianthemum lippii (stem, leaf, and fruit), Inula montana, Anabasis articulata and Sedum villosum. A positive correlation, R2 = 0.906, was observed between total flavonoid contents and TAC values, reflecting a high involvement of flavonoids in antioxidant activity, but no correlation was established between the five tests and the total phenolic and proanthocyanidin contents.

【 授权许可】

Unknown