Chemical composition, antioxidant and antimicrobial activities of stem barks of < em > Englerina gabonensis < /em > Engler and < em > Sterculia tragacantha < /em > Lindl from Gabon

Aim of this work was to evaluate the phytochemical constituents, antioxidant and antimicrobial potential of water-acetone, water-ethanol and water extracts ofEnglerina gabonensis andSterculia tragacantha.Presence of phenols was evaluated to estimate the effects of plants on microbial diseases. Water-acetone, water-ethanol and water extracts were examined for antioxidant activities. All plant extracts were tested against six reference strains, eleven clinical isolates and two fungal strains.Phenolic content were highest in the water-acetone and water-ethanol extracts fromEnglerinagabonensis in comparison withSterculia tragacantha.The AAI (Antioxidant Activity Index)of water-acetone and water-ethanol extracts of  Englerina gabunensis are superiors with 2. Plant extracts ofSterculia tragacantha show weak antioxidant activity (AAI< 0.5).The aqueous extract ofEnglerina gabonensis  has a bactericidal effect onSalmonella Spp. Water-ethanol extract is bactericidal onBacillus cereusLMG 13569 BHI,Salmonella SppandNeisseria meningitides.Water-acetone extract presents a bactericidal activity onEnterococcus faecalis103907 CIP,Escherichi coli,Staphylococcus aureus,Acinetobacter baumanniiandNeisseria meningitides.Our results suggest thatEnglerina gabonensis extracts contain greater antioxidant and antimicrobial properties thanSterculia tragacantha  extracts.
Source: International Journal of Phytomedicine - Category: Science Authors: Source Type: research