Antibacterial and antioxidant activities of ethyl acetate extract of nettle (Urtica dioica) and dandelion (Taraxacum officinale).
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Date
2013-05
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Abstract
The antibacterial and antioxidant activities of ethyl acetate extract of nettle (Urtica dioica) and dandelion
(Taraxacum officinale) was studied, also phytochemical screening and determination of total phenolic content
has been investigated. The results revealed that ethyl acetate extract of nettle was more effective on all bacterial
isolates (Aeromonas hydrophila, Salmonella typhi, Staphylococcus aureus, Bacillus cereus, Escherichia coli)
than dandelion with highest inhibition zone (24 mm) towards B. cereus, A hydrophila was more resistant than
other bacteria. Also it was found that nettle gave large inhibition zone to S. typhi (22mm). Ethyl acetate of nettle
had the highest content of phenolic compounds (48.3mg GAE/gdw) while dandelion had only (10.2 mg
GAE/gdw) of phenolic content. The phytochemical qualitative screening exhibited flavonoid, glycosides and
phenols were present in nettle and dandelion. In nettle, alkaloid, tannins and terpenoids were present, while
absent in dandelion, on the other hand, dandelion had the saponins which not found in nettle. Steroids not present
in the tow plants. Evaluation of antioxidant activities of ethyl acetate extract of nettle and dandelion by ferric
thiocyanate method (FTC) exhibited that nettle caused 76% lipid peroxidation in inhibition of linoleic acid
emulsion; this activity was greater than dandelion (44%) and α-tocopherol (65%).
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Keywords
Nettle, dandelion, antibacterial, antioxidant and phytochemical
Citation
Ghaima Kais Kassim, Hashim Noor Makie, Ali Safaa Abdalrasool. Antibacterial and antioxidant activities of ethyl acetate extract of nettle (Urtica dioica) and dandelion (Taraxacum officinale). Journal of Applied Pharmaceutical Science. 2013 May; 3(5): 96-99.