
Kheira Zerrouki
University of Mostaganem, AlgeriaTitle: Antimicrobial Activity of Phenolic Extracts of Juniperus phoenicea and Glycyrrhiza glabra from Western Algeria
Abstract
The main focus of this study was the antimicrobial effect of 2 medicinal plants that belong to the Algerian
Mediterranean flora, Glycyrrhiza glabra and Juniperus phoenicea, The phenolic extracts of Glycyrrhiza glabra
and Juniperus phoenicea gave respective yields of 56.15% and 47.40% with methanol/water 70% (v/v). A yield
of 52.45% and 42.30% was obtained with ethanol/water 70 % (v/v). Total phenolic results showed that in both
plants, the hydroethanolic extract was richer than hydroethanolic extract represented by 122.88±6.64 mg Galic
Acid equivalent (GAE)/g dm and 120.54±3.35 mg GAE/g ms. The total flavonoids were about 15.48±4.97 and
14.01 ±8.57 mg EQ/g for J. phoenicea and G. glabra, respectively. Antimicrobial activity results showed that
hydromethanolic extract of J. phoenicea, G. glabra, and their combination was more active against
Staphylococcus aureus ATCC 33862, whereas they were completely inactive against Pseudomonas aeruginosa
ATCC 2785, E. coli ATCC 25922, and C. albicans ATCC 10231. MBC and MIC were 80 and 10 mg/ml for J.
phoenicea hydromethanolic extract, 20 and 80 mg/ml for G. glabra hydroethanolic extract, and 2.5 and 20
mg/ml for combined extract, respectively.
Biography
Kheira Zerrouki is a researcher a at the university of Mostaganem, Algeria in the field of Biology, nutrition, food and herbal biomolecules. She is a teacher in the department of food Sciences. Still Master ‘s supervision. Already have been a member in project research. Have done many training in the field of biological and chemical analysis national and international laboratories.