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    Antimicrobial and antioxidant activities of medicinal plant Glycyrrhiza glabra var. glandulifera from different habitats
    (Taylor & Francis Ltd, 2016) Karahan, Faruk; Avsar, Cumhur; Ozyigit, Ibrahim Ilker; Berber, Ismet
    In this study, the antimicrobial and antioxidant activities of root methanolic extracts of Glycyrrhiza glabra var. glandulifera (Waldst. & Kit.) Boiss. (Fabaceae) were investigated. Plant samples were collected from different habitats in the East Mediterranean part of Turkey. The plant extracts were evaluated for antimicrobial activities against nine bacterial and two yeast strains using disc-diffusion and minimum inhibitory concentration methods. The antioxidant activity was determined by using the DPPH (1,1-diphenyl-2-picrylhydrazyl) method. The antimicrobial assays indicated that the plant root extracts were more effective against Gram-positive bacteria than against Gram-negative ones. In addition, the extracts had higher antimicrobial effect against Candida species than against bacteria. The extracts showed good antioxidant activity, with a median inhibitory concentration (IC50) in the range of 588 +/- 0.86 mu g/mL to 2190 +/- 1.73 mu g/mL. Results indicated that different environmental conditions in each habitat might affect the contents of chemical compounds and biological activity in the natural licorice populations of. This study also supported the traditional use of licorice and as well as suggested that it may also be its beneficial role in the treatment of other infections. The obtained results indicated that different environmental conditions in each habitat might affect the contents of chemical compounds and the biological activity in the natural licorice populations.