Antioxidant activity and total phenolic content of aqueous and methanolic extracts of Jordanian plants: an ICBG project
Antioxidant activity and total phenolic content of aqueous and methanolic extracts of Jordanian plants: an ICBG project
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DOI：
10.1080/14786410701590285
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发表时间：
2007-01-01
影响因子：
2.2
通讯作者：
Oberlies, Nicholas H.
中科院分区：
文献类型：
--
作者：
Alali, Feras Q.;Tawaha, Khaled;Oberlies, Nicholas H.
作为国际合作生物多样性小组（ICBG）计划的一部分，研究约旦的生物多样性，抗氧化活性的相对水平和总酚含量的水和甲醇提取物的共95种植物，所有约旦原产地和那些随机收集，已被测量。所研究的植物物种的水提取物和甲醇提取物的总酚含量分别为4.4至78.3 mg和2.1至52.8 mg没食子酸当量g（-1）干重，而总抗氧化能力分别为20.0至916.7和15.1至915.6 μ mol Trolox当量g（-1）干重。基于此收集，大约5%的测定植物显示出高水平的抗氧化活性。水提取物和甲醇提取物的抗氧化活性和总酚含量之间存在显着的线性相关性，这表明酚类化合物是所调查的植物物种中的主要抗氧化成分。有趣的是，一些收集的植物具有高抗氧化活性，但“低”酚含量，包括角豆和槲寄生。这些植物可以作为具有新化学类型的抗氧化剂的来源。
As part of an International Cooperative Biodiversity Groups ( ICBG) program to study Jordan's biodiversity, the relative levels of antioxidant activity and the total phenolic content of aqueous and methanolic extracts of a total of 95 plant species, all of Jordanian origin and those collected at random, have been measured. The total phenolic content of aqueous and methanolic extracts of the investigated plant species ranged from 4.4 to 78.3 mg and from 2.1 to 52.8 mg gallic acid equivalents g(-1) dry weight, respectively, while the total antioxidant capacity ranged from 20.0 to 916.7 and from 15.1 to 915.6 mu mol Trolox equivalents g(-1) dry weight, respectively. Based on this collection, approximately 5% of assayed plants showed high levels of antioxidant activity. There was a significant linear correlation between antioxidant activity and total phenolic content for aqueous and methanolic extracts, suggesting that phenolic compounds were the predominant antioxidant components in the investigated plant species. Interestingly, a few of the collected plants had high-antioxidant activity yet " low'' phenolic content includes Ceratonia siliqua and Viscum cruciatum. These plants may serve as sources of antioxidants with new chemotypes.