Evaluation of the Antioxidant Potential and Chlorogenic
Acid Contents of Three Endemic Sideritis Taxa from Turkey
Alper GÖKBULUT*°, Ayŝe Nur YAZGAN*, Hayri DUMAN**,
Betül SEVER YILMAZ*
* Ankara University, Faculty of Pharmacy, Department of Pharmacognosy, 06100, Ankara, Turkey
** Gazi University, Faculty of Science and Literature, Department of Biology, 06500, Ankara, Turkey
° Corresponding Author:
Tel: 0312 203 30 87,
Fax: 03122131081,
E-mail address: gokbulut@pharmacy.ankara.edu.tr
Summary
In the present study, the endemic Sideritis argyrea, S. congesta and
S. erythrantha var. cedretorum methanol extracts from the dried
aerial parts were evaluated for their antioxidant potential and total
phenolic content. Also, one of the major constituents, chlorogenic
acid was quantified using a previously validated HPLC method.
The highest total phenolic content was determined in S. erythrantha
var. cedretorum as 190.78±2.46 mg GAE/g; whereas, the highest
antioxidant activity results were obtained for S. erythrantha var.
cedretorum by using both DPPH and ABTS assays. Chlorogenic
acid contents of the S. argyrea, S. congesta, and S. erythrantha
var. cedretorum were determined as 0.196±0.01 g/100g dw,
0.289±0.007 g/100g dw, and 0.282±0.01 g/100g dw, respectively.
Sideritis taxa with particular high total phenolic content and
antioxidant potential can be addressed as a chlorogenic acid source.
Key Words :
Sideritis, DPPH, ABTS, Folin, Lamiaceae, HPLC,
