Antibacterial activity of different extracts of Helianthus tuberosus L.

Abstract

Helianthus tuberosus L. is a plant originating from North America, which is original cultivated for human consumption. In many studies researchers pointed to the fact that the extracts obtained with polar solvents have a greater microbial activity. In accordance with this, the aim of our study was to compare antibacterial activities of extracts of Helianthus tuberosus L. obtained in polar (methanol) and non-polar (petrol-ether) solvents. The strongest antibacterial activity was expressed by Helianthus tuberosus L. methanol extract on bacteria Salmonella Typhimurium ATCC 14028 and Escherichia coli ATCC 25922 while petrol-ether extract expressed strongest antibacterial activity on Salmonella Typhimurium ATCC 14028 (7,8125 μg/mL). The lowest antibacterial activity was expressed by petrol-ether extract on Listeria monocytogenes ATCC 19112 (500 μg/mL). Results indicate that extracts obtained using a polar solvent have stronger antibacterial activity.