Phytochemical screening and antimicrobial activities of some green algae from Egypt
Mohamed Abdu, Marwa Gamal Saad and Hesham M Shafik
Chlorophytes represent the largest group as eukaryotic photosynthetic green organisms. Most micro- and macro-green algae are potential sources for active compounds. Ulva sp, Enteromorpha sp, and Chlorella sorokiniana were isolated from the Mediterranean Sea, Port Said, Egypt. The phytochemical constituents (alkaloids, saponins, tannins, terpenoids, flavonoids, cardiac glycosides and anthraquinone) and the antimicrobial properties were investigated for all species` extracts. Cells were dried then grounded. The powdered biomass was soaked into different solvents (methanol and acetone). The antimicrobial activities of different fraction were done using the disc diffusion technique. Results indicated the presence of different active compounds, and the antimicrobial property in all species which increase the importance of them. The phytochemical screening of methanolic and acetonic extract revealed the presence of phytoconstituents including anthraquinones, cardiac glycosides, flavonoids, saponins, tannins and terpenoids. The antimicrobial assessment confirmed the effect of C. sorokiniana extracts on the growth of Escherichia coli and Staphylococcus aureus.