Antibacterial and antifungal activity of Eurasian water-milfoil collected from lentic and lotic water body in Central Black Sea Region, Turkey

Ömer ERTÜRK, Beyhan TAŞ, Hazal ŞAHİN


The natural compounds obtained from plants are very important as antioxidant and antimicrobial agents. However, researchers were mostly focused on terrestrial plants.  In this study, the antimicrobial effects of the submerged macrophyte Myriophyllum spicatum L. was investigated, an invasive species in freshwater and having a strong allelopathic potential. In the direction of research, the samples were collected from Lake Ulugöl (Ordu) and the Terme Creek (Samsun). Ethanolic extracts from dried and milled plants were prepared. The antimicrobial activities of the extracts were tested against test microorganisms by means of disk diffusion method. Four gram-positive bacteria, four Gram-negative bacteria, one mold and one candida were used tested microorganism. Our data showed that Gram-positive bacteria were more sensitive than Gram-negative. The most sensitive microorganisms were C. albicans, A. brasiliensis, B. subtilis, and the lowest efficacy on E. coli. M. spicatum samples taken from the Terme Creek showed higher antimicrobial activity than Lake Ulugöl. M. spicatum is a macrophyte which is widespread and which grows naturally in all kinds of freshwater. Thus, this macrophyte and similar macrophytes with high therapeutic potential can play a significant role in pharmaceutical process and drug discovery.


Myriophyllum spicatum; microbial pathogen; antimicrobial activity; aquatic plants; spiked water-milfoil

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