Antimicrobial Effects of Aqueous Extracts Obtained from Fallen Leaves of Ginkgo biloba

摘要

The filter paper method was used to study the antimicrobial effects of aqueous extracts obtained from fallen leaves of Ginkgo biloba on the common environment contaminative microorganisms. The influences of temperature, ultraviolet light, and pH value on the antibacterial activity were also evaluated. The results showed the aqueous extracts could inhibit all the tested strains at the different extents. The extracts had the strongest antibacterial function against Pseudomonas aeruginosa and the effect was greater in higher extracts concentration. The aqueous extracts had excellent thermal stability but poor ultraviolet stability and could maintain good antimicrobial effect in a broad range of pH values.