Ataturk University, Oltu Vocational School, 25800 Oltu, Erzurum, Turkey.
Biol Res. 2009;42(2):175-81. Epub 2009 Aug 20.
Methanolic extracts of eight Salvia species, namely S. aethiopis, S. candidissima, S. limbata, S. microstegia, S. nemorosa, S. pachystachys, S. verticillata, and S. virgata, sampled from Eastern Anatolia in Turkey, were screened for their possible antioxidant activities by two complementary test systems, namely DPPH free radical scavenging and beta-carotene/linoleic acid. Total phenolic content of the extracts of Salvia species were performed Folin-Ciocalteu reagent and gallic acid used as standard. A wide variation has been observed among species in terms of antioxidant activity and total phenolic content. In both DPPH and beta-carotene system, the most active plant was Salvia verticillata with a value of IC50=18.3 microg/ml and 75.8%, respectively. This species also has the highest total phenolic content (167.1 mgGAE/g DW). The total amount of phenolics was between 50.3 to 167.1 mgGAE/g DW among species. A positive linear correlation was observed between total phenolic content and antioxidant activity of the extracts. The results suggest that the extract of Salvia species, notably Salvia verticillata with the highest antioxidant activity, can be used as natural antioxidants in the food industry.
从土耳其东安纳托利亚采集的 8 种鼠尾草属植物（包括 S. aethiopis、S. candidissima、S. limbata、S. microstegia、S. nemorosa、S. pachystachys、S. verticillata 和 S. virgata）的甲醇提取物，通过两种互补的测试系统，即 DPPH 自由基清除和β-胡萝卜素/亚油酸，来筛选其可能的抗氧化活性。鼠尾草属植物提取物的总酚含量采用 Folin-Ciocalteu 试剂和没食子酸作为标准进行测定。在抗氧化活性和总酚含量方面，不同物种之间存在广泛的差异。在 DPPH 和β-胡萝卜素体系中，最活跃的植物是 Salvia verticillata，其 IC50 值分别为 18.3μg/ml 和 75.8%。该物种还具有最高的总酚含量（167.1mgGAE/g DW）。总酚含量在 50.3 到 167.1mgGAE/g DW 之间。提取物的总酚含量与抗氧化活性之间存在正线性相关性。结果表明，具有最高抗氧化活性的 Salvia verticillata 等鼠尾草属植物提取物可作为食品工业中的天然抗氧化剂。
