Akademik Veri Yönetim Sistemi
BIOCHEMICAL SYSTEMATICS AND ECOLOGY, cilt.109, sa.1, ss.1-15, 2023 (SCI-Expanded)
Species from the Gundelia genus are among the important main therapeutic herbs widely used in Middle Eastern
nations’ traditional medicine. The emphasis of the current investigation was on the bioactive phytochemicals and
biopharmaceutical efficacy of all 22 species of Gundelia taxa worldwide. Herewith, ethanolic extracts of root,
stem-leaf and flower parts of twenty two Gundelia species were prepared and their bioactive phytochemicals were
quantified by a comprehensive and validated LC-MS/MS (liquid chromatography tandem mass spectrometry)
method. The results of the LC-MS/MS study revealed that, chlorogenic acid (0.042–93.52 mg/g extract), quinic
acid (3.860–63.761 mg/g extract), kaempferol-3-O-glucoside (0.019–42.737 mg/g extract), luteolin-7-Oglucoside
(cymaroside) (0.013–34.017 mg/g extract), quercetin-3-O-glucoside (0.021–24.241 mg/g extract),
apigenin-7-O-glucoside (0.006–15.859 mg/g extract), 1,5-dicaffeoylquinic acid (0.014–4.827 mg/g extract) and
caffeic acid (0.020–4.082 mg/g extract) amounts were remarkable in the overall assessment of the quantification
results. Furthermore, bioactivities of the studied extracts were determined by evaluating total phenolic-flavonoid
contents and ABTS (cation radical scavenging activity), DPPH (free radical scavenging activity) and CUPRAC
(cupric reducing antioxidant capacity) antioxidant test assays. With a few exceptions, all antioxidant test assays
showed that the root ethanol extracts of the examined Gundelia species had stronger antioxidant activity than
their flower and stem-leaf extract counterparts. Based on the results of the ABTS assay, it was discovered that the
antioxidant capacities of root-ethanol extracts of G. purpurascens, G. dersim, G. armeniaca, G. armata, G. aragatsi,
G. microcephala, G. tournefortii and G. tehranica (IC50 < 10 μg/mL) were at least as high as those of BHT
(Butylated hydroxytoluene) (IC50: 11.35 ± 0.22 μg/mL) and α-tocopherol (IC50: 9.23 ± 0.12 μg/mL), which were
used as the reference compounds. To conclude, this is the first study in which the phytochemical contents and
antioxidant activities of different parts of all Gundelia taxa in the world were determined together. Moreover, in
this study, the phytochemical quantitation and bioactivity of G. microcephala, G. cappadocica, G. tehranica,
G. aragatsi, and G. tenuisecta species were evaluated for the first time.