Fatty acids and antioxidant capacities of three Centaurea L. species

Abstract

The aim of this study is to determine the fatty acid compositions and antioxidant activities of three Centaurea species as Centaurea iberica, C. urvillei ssp. hayekiana, and C. urvillei ssp. nimrodis and compare them with each other. As a result of fatty acid determination by GC MS method, oleic acid and linoleic acid were found as the main fatty acids in these Centaurea species. Polyunsaturated fatty acids (PUFAs) were determined at 58.66%, 46.98%, 62.22% in C. iberica, C. urvillei ssp. hayekiana and C. urvillei ssp. nimrodis, respectively. Antioxidant activities of methanolic extracts of three Centaurea species were evaluated by DPPH, ABTS and CUPRAC assays. The methanol extract of C. urvillei ssp hayekiana showed the highest antioxidant activity in direct proportion to the total amount of phenolic and flavonoid substances. The fact that the antioxidant activities of these three species and fatty acid analyzes have not been compared in previous studies is important in that this study is the first.

Antioxidant Properties, Total Phenolic Content and LC-MS/MS Analysis of Mentha Pulegium, Lepidium Draba and Centaurea Solstitialis

“…In a study by Gülçin et al, (2020) ABTS radical scavenging IC 50 values of Mentha pulegium were found as 7.92 µg mL -1 for methanolic extract and 9.37 µg mL -1 for aqueous extract. In a study by Taştan et al, (2022) ABTS radical scavenging IC 50 values for three different Centaurea species were found as 50.13, 98.43 and 75.04 μg mL -1 for methanolic extract. In a study by Ouissem et al, (2018) ABTS radical scavenging IC 50 values for Lepidium draba was found 39.42 μg mL -1 for ethyl acetate extract.…”

“…(Elazıg, Türkiye). The total phenolic substance amounts in the methanol extract of Centaurea species are 182 460, 40 2080 and 24 3910 μg GAE g -1 dry matter respectively (Taştan et al, 2022). In the study conducted by Alper et al, they found the total amount of phenolic substance in the ethanolic extract of Centaurea solstitialis as 52 310 μg GAE g -1 extract (Alper et al, 2021).…”

“…In a study by Gülçin et al, DPPH radical scavenging IC 50 values of Mentha pulegium were found to be 16.92 μg/mL for methanolic extract and 18.52 μg mL -1 for aqueous extract (Gülçin et al, 2020). Taştan et al, (2022) reported DPPH radical scavenging activities in methanolic extract of three different Centaurea species as IC 50 of 55.82, 17.18 and 36.71 μg mL -1 , respectively. In a study by Alper et al, (2021) DPPH radical scavenging IC 50 values of Centaurea solstitialis were found to be 55.04 mg trolox equivalents g -1 for ethanolic extract.…”