Şule CEYLAN, Burhan HARŞIT, Özlem SARA, Mehmet ÖZCAN, İsmail DEMİR

Türkiye’nin Artvin ve Giresun bölgelerindeki Kantaron (Hypericum montbretii ve Hypericum bupleuroides) ve Karaçalı (Paliurus spina-christi Mill) bitkilerinin antioksidan ve antimikrobiyal aktivitelerinin karşılaştırılması

Tıbbi ve aromatik bitkilerden olan Kantaron (Hypericum montbretii ve Hypericum bupleuroides) ve karaçalı (Paliurus spina-christi Mill) bitkilerinin yaprak, çiçek ve kök gibi kısımlarından oluşan 13 farklı örneğin antioksidan aktivitesi DPPH, FRAP ve CUPRAC yöntemleri kulanılarak incelenmiştir. Aynı zamanda bitki ekstraktların toplam fenolik ve toplam flavonoid miktarları da ölçülmüş ve antimikrobiyal özellikleri de belirlenmiştir. Antioksidan aktivite sonuçlarına göre tüm analizler içinde (toplam polifenol miktar analizi hariç) en iyi aktivite Kantaron (Hypericum montbretii) bitkisinin kuru yaprağında olduğu bulunmuştur. Toplam polifenol analizine göre ise en yüksek aktivitenin 22.485±0.656 mg GAE /g değeri ile Kantaron’un (Hypericum montbretii) çiçek kısmına ait olduğu görülmüştür. Antimikrobiyal analizler ise disk düfüzyon yöntemi kullanılarak yapılmış ve bitki ekstraktlarının 12 tane test mikrorganizması üzerine etkisi incelenmiştir. Bu sonuçlara göre bitkilerden çoğunun bakterilere ve mantar suşlarına karşı iyi derecede aktivite gösterdiği gözlenmiştir.

Comparison of antioxidant and antimicrobial activities of plant extracts Centaury (Hypericum montbretii and Hypericum bupleuroides) and Blackthorn (Paliurus spina-christi Mill) in Artvin, Giresun region of Turkey

Antioxidant activity 13 different samples of medicinal and aromatic plants of Centaury (Hypericummontbretii), Centaury (Hypericum bupleuroides), Blackthorn (Paliurus spina-christi Mill), including leaf,flower and stem, was investigated using DPPH, FRAP and CUPRAC methods. Total flavonoid, totalphenolic amount and the antibacterial features of extracts from these herbs were also determined.According to the obtained of antioxidant datas, except for the result of total polyphenol assay, thedried leaves of Centuary (Hypericum montbretii) had the best antioxidant property that was realizedin all results. Accordingly test of total polyphenol, the content of yellow flower of Centuary (Hypericummontbretii) herb was measured as of 22.48±0.66 mg GAE /g dry herb sample and so this herb had thehighest total phenolic content. Antimicrobial activity tests were carried out using disc diffusionmethods with 12 microbial species and the most of them displayed good-moderate antimicrobial andantifungal activity..

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