Keskin, CumaliOzen, Hasan CetinToker, ZuhalKizil, GokselKizil, Murat14.07.20192019-07-1614.07.20192019-07-1620182619-9149https://dx.doi.org/10.18016/ksudobil.322478https://hdl.handle.net/20.500.12514/1281Objective of this study was to investigate the antioxidant and antimicrobial properties of shoot and and root parts of Astragalus diphtherites var. diphtherites (A. diphtherites) and Astragalus gymnalopecias (A.gymnalopecias) species which were subjected to solvent series with different polarity. Total phenolic, total flavonoid, 2.2-diphenyl - 1 - picryl-hydrazyl (DPPH). metal chelating, reducing power and hydroxy radicals scavenging activities of the extracts were tested to determine antioxidant. properties. The highest total phenolic content of A. diphtherites. was obtained from the methanol extract of shoots and the acetone extract of root parts. On the other Antimicrobial. hand. the highest total phenolic content in A. gymnalopecias were achieved from methanol extract of shoot parts and the ethyl acetate extract of the root part. The highest amount of total flavonoids and reducing power activities of A. diphtherites and A. gymnalopecias were obtained from the acetone extracts in the shoot. part and from the ethyl acetate extracts in the root part. While the highest DPPH radical scavenging activity was determined in the methanol extract in the shoot part and the acetone extract in the root part of A. diphtherites. The highest DPPH radical scavenging activity for A. gymnalopecias was determined in the methanol extract of the shoot part and the ethyl acetate extract of the root part. The highest metal chelating activity was seen in the methanol extracts from shoot parts and in the hexane extracts from the root part of A. diphtherites. The ethyl acetate extracts of the shoot and root part in both species showed the highest hydroxyl radical scavenging activity. It. was determined that. acetone and methanol extracts of the shoot part of A. gymnalopecias have inhibition effect on the growth of Streptococcus pyogenes.en10.18016/ksudobil.322478info:eu-repo/semantics/closedAccessAstragalus diphtherites FENZL var diphtheritesAstragalus gymnalopecias RECH FILAntioxidantAntimicrobialBiological activityArticle212157166N/AWOS:000441467900008