Akademik Veri Yönetim Sistemi
4th International Congress on Plant Biology, Denizli, Türkiye, 3 - 06 Eylül 2025, ss.48, (Özet Bildiri)
Turkey is internationally recognized for its medicinal and aromatic plants, attributable to its strategic geographic location, climatic heterogeneity, and high floristic diversity. Its floristic diversity supports the natural distribution of these species, which play vital roles in ecosystem stability and human health. Medicinal and aromatic plants are widely used as raw materials in various industries, particularly in the pharmaceutical, food, and cosmetic sectors. In this context, Erzincan is recognized as a region of significant botanical interest in Turkey due to its high level of plant diversity. The region's geological structure, topographic complexity, and climatic variability play a critical role in shaping its diverse and ecologically distinct vegetation. In this study, four endemic species of the genus Hedysarum (i.e., H. candidissimum, H. erythroleucum, H. nitidum, and H. yilmazunalii), which are naturally distributed in Erzincan and known for their traditional medicinal use, were investigated. The plants were divided into root, stem, and leaf parts; and their methanolic extracts were analyzed for total phenolic and flavonoid contents as well as antioxidant activities using DPPH and FRAP assays. Among the leaf extracts, H. candidissimum demonstrated the highest activity (220.84 ± 1.07 mg GAE/g, 107.26 ± 0.77 mg QE/g, 192.47 ± 0.91 μg TE/g, IC50: 5.43 ± 0.18 μg/mL). In stem and root extracts, the highest values were found in H. yilmazunalii, with 176.80 ± 0.53 μg TE/g, IC50: 9.16 ± 0.30 μg/mL and 106.78 ± 0.18 μg TE/g, IC₅₀: 112.96 ± 2.19 μg/mL, respectively. The findings demonstrate that antioxidant activity in Hedysarum species varies depending on both the species and the plant organ. The results highlight that the investigated species represent a valuable endemic phytochemical source in terms of phenolic content and antioxidant capacity. These findings also indicate that organ- and species-specific differences can serve as a valuable reference for future phytochemical and pharmacological research.