Flavonoids and Essential Oil of Bidens cernua of Polish Origin and in Vitro Antimicrobial Activity of the Oil
Records of Natural Products
Year: 2017 Issue: 5 September-October
p.468 - 473
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Monika Tomczykowa, Michał Tomczyk, Katarzyna Leszczyńska, and Danuta Kalemba
Phytochemical studies of the aerial parts of Bidens cernua L. led to the isolation of six flavonoids: luteolin (1), flavanomarein (2), tilianin (3), maritimetin (4), cynaroside (5) and cosmosiin (6). The quantitative analysis of flavonoids exhibited 0.81% contents of flavonoids in flowers and 1.62% in the herb counted as a hyperoside equivalent. Total Tannins Content showed the occurrence of 7.87% in flowers and 5.83% in the herb. The chemical composition of the essential oil obtained from the herb of B. cernua was evaluated in 92.2%, which corresponds to 99 compounds. Antimicrobial activity of the essential oil was evaluated on Gram-positive, Gram-negative bacteria and fungi. The oil exhibited a strong antibacterial and antifungal activity, especially against Gram-positive bacterial strains. T his is the first time the aforementioned compound (3) has been isolated from B. cernua.KEYWORDS
- Bidens cernua
- phytochemical analysis
- essential oil
- antimicrobial activity.