Baba Shoib A, Malik Shahid A
Department of Botany, University of Kashmir, Srinagar 190001, Jammu and Kashmir, India.
Department of Chemistry, University of Kashmir, Srinagar 190001, Jammu and Kashmir, India.
Saudi J Biol Sci. 2014 Nov;21(5):493-8. doi: 10.1016/j.sjbs.2014.06.004. Epub 2014 Jun 27.
In this study our objective was to evaluate the antioxidant and antimicrobial activity of methanolic extracts of leaves and roots of Gentiana kurroo. The antioxidant activities of the extracts were examined using different biochemical assays namely diphenylpicrylhydrazyl (DPPH), nitroblue tetrazolium (NBT) and ferric reducing power (FRAP). In all the assays, root extract exhibited stronger antioxidant activity than that of leaves. The antibacterial activity of the extracts was also evaluated and MIC values were calculated by broth dilution method. Although, the extracts prevented the growth of both Gram positive and Gram negative bacteria, the MIC values of methanolic extract of the leaves were higher than those of the root extract. The antibacterial and antioxidant activity of the extracts was found to be positively associated with the total phenolic and flavonoid content of the extracts.
在本研究中,我们的目的是评估藏药秦艽叶和根甲醇提取物的抗氧化和抗菌活性。采用不同的生化分析方法,即二苯基苦味酰基自由基(DPPH)、氮蓝四唑(NBT)和铁还原能力(FRAP)来检测提取物的抗氧化活性。在所有分析中,根提取物表现出比叶提取物更强的抗氧化活性。还评估了提取物的抗菌活性,并通过肉汤稀释法计算了最低抑菌浓度(MIC)值。虽然提取物能抑制革兰氏阳性菌和革兰氏阴性菌的生长,但叶甲醇提取物的MIC值高于根提取物。发现提取物的抗菌和抗氧化活性与提取物中总酚和黄酮含量呈正相关。