Phytochemical and Biological Activities of five Turanecio Hamzaoglu (Asteraceae) Species from Turkey
Objectives: In vitro biological activities of methanolic extracts of five Turanecio species
have been studied.
Materials and Methods: The phenolic compositions of the extracts were evaluated by the Folin-
Ciocalteu assay and by HPLC analysis. Antioxidant activities were determined with two in vitro assays
namely, DPPH (2,2-diphenyl-1-picrylhydrazyl) scavenging assay and phosphomolybdenum assay. The
antimicrobial activities of the extracts were evaluated against 13 microorganisms.
Results: T. hypochionaeus var. hypochionaeus was showed the highest DPPH inhibition with 88.84% at
100 μg·mL-1. All of the extracts were exerted high total antioxidant activities 128.00- 243.13 mg AAE
g-1) and seem to be a promising source of natural antioxidants. The phenolic contents in the extracts varied
from 26.17 to 60.99 mg·g-1 as gallic acid equivalent. Chlorogenic acid, caffeic acid and p- coumaric
acid were the predominant constituents. The methanolic extracts revealed promising antibacterial activities
against most bacteria. No activity was recorded against yeasts tested.
Conclusion: The polyphenolic constituents appear to be responsible, at least in part, for the extract’s activities.
The present study confirms that tested Turanecio species contains significant source of phenolics
have antioxidant and antimicrobial activities and may have therapeutic potential.
Keywords: Antimicrobial activity, antioxidant activity, phenolic, Turanecio.
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