STUDY ON THE DPPH FREE RADICAL-SCAVENGING ACTIVITY OF SALVIA NEMOROSA L. AT TWO GROWTH STAGES

Elham Ghafiyehsanj, Kamaladdin Dilmaghani, Nader Chaparzade, S. Saadatmand
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Abstract

This study was designed to examine the DPPH free radical-scavenging activity, in different concentrations (0.025, 0.05, 0.07, 0.1, 0.2, 0.04 and 0.6) of methanolic extracts of Salvia nemorosa L. collected from the northwest of Iran (Zonouz and Ardabil regions) at two-stage of growth (vegetative stage leaves, flowering stage leaves, and flowers). The result showed that the mean of inhibition percentage in the Zonouz region increased in various concentrations and between flowers, vegetative stage leaves, and flowering stage leaves, compared with the plants of the Ardabil region. In each of the regions of Zonouz and Ardabil, the highest amount of DPPH inhibition was observed in the vegetative stage leaves in comparison with flowering stage leaves and flowers. In addition, in the effect of DPPH radical trapping in different concentrations of methanolic extracts of Salvia nemorosa L. was observed that from each of the collected region, methanolic extracts from sage plants were dose-dependent and acted very effective and useful and the best antioxidant activity was in the high concentration of extracts, So in Zonouz and Ardabil regions, the content of inhibition of DPPH increased significantly, by increasing the concentration of 0.025 mg/ml to 0.6 mg/ml and in Zonouz region the content of inhibition of DPPH similarly increased in 0.2, 0.4 and 0.6 mg/ml concentrations. In the Ardabil region, the most content of inhibition of DPPH was seen in 0.4 mg/ml and 0.6 mg/ml concentrations, but in this region, the content of inhibition of DPPH in 0.2 mg/ml concentration there was only in vegetative stage leaves and flowering stage leaves.
鼠尾草两个生长阶段对DPPH自由基清除能力的研究
本研究研究了采自伊朗西北部(Zonouz和Ardabil地区)不同浓度(0.025、0.05、0.07、0.1、0.2、0.04和0.6)的鼠尾草(Salvia nemorosa L.)甲醇提取物在营养期叶、花期叶和花的两个生长阶段对DPPH自由基的清除能力。结果表明,与阿达比尔地区相比,Zonouz地区在不同浓度下以及在花、营养期叶和开花期叶之间的平均抑制率都有所增加。在Zonouz和Ardabil的每个区域,与开花期叶片和花相比,营养期叶片中DPPH的抑制量最高。此外,在不同浓度鼠尾草甲醇提取物对DPPH自由基的诱捕效果中,我们观察到,在不同的采集区,鼠尾草甲醇提取物具有剂量依赖性,并且具有非常有效和有用的作用,并且在高浓度的提取物中具有最好的抗氧化活性,因此在Zonouz和Ardabil地区,DPPH的抑制含量显著增加。当浓度为0.025 mg/ml至0.6 mg/ml时,Zonouz区对DPPH的抑制作用在0.2、0.4和0.6 mg/ml浓度下均明显增加。在阿达比尔地区,0.4 mg/ml和0.6 mg/ml浓度对DPPH的抑制含量最高,但在该地区,0.2 mg/ml浓度对DPPH的抑制含量仅在营养期和开花期叶片中存在。
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