FABAD J. Pharm. Sci., 36, 11-15, 2011 11 RESEARCH ARTICLE Antimicrobial Activity of Some Verbascum Species Growing in Turkey Çiğdem KAHRAMAN*, Melike EKIZOĞLU**, Didem KART**, Zeliha Ş. AKDEMIR*, I. Irem TATLI***° Antimicrobial Activity of Some Verbascum Species Growing in Turkey Summary The antimicrobial activities of methanol extracts of seven Verbascum species were studied. The dried extracts of the aer- ial parts of Verbascum dudleyanum (Hub.-Mor.) Hub.-Mor., V. latisepalum Hub.-Mor., V. mucronatum Lam., V. olympi- cum Boiss., V. stachydifolium Boiss. & Heldr. and V. uschack- ense (Murb.) Hub.-Mor., the flowers of V. lasianthum Boiss. were tested against standard bacterial strains of Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27853), Staphylococcus aureus (ATCC 29213), Enterococcus faecalis (ATCC 29212), and standard fungal strains of Candida albi- cans ATCC 90028, Candida parapsilosis ATCC 90018 and Candida krusei ATCC 6258 by disc diffusion methods, which were recommended by Clinical and Laboratory Standards Institute. While V. mucronatum Lam. and V. olympicum Boiss. showed an antibacterial activity against gram positive bacteria, and S. aureus as well as V. latisepalum Hub.-Mor. showed an antifungal activity against C. krusei. The other species had no activity. Key Words: Verbascum dudleyanum, V. lasianthum, V. latisepalum, V. mucronatum, V. olympicum, V. stachydifolium, V. uschackense, Scrophulariaceae, Antimicrobial Activity. Received: 20.04.2012 Revised: 20.09.2012 Accepted: 27.09.2012 Türkiye’de Yetişen Bazı Verbascum Türlerinin Antimikrobiyal Aktiviteleri Özet Yedi Verbascum türünün metanol ekstrelerinin antimikrobiyal aktivitesi çalışılmıştır. Verbascum dudleyanum (Hub.-Mor.) Hub.-Mor., V. latisepalum Hub.-Mor., V. mucronatum Lam., V. olympicum Boiss., V. stachydifolium Boiss. & Heldr., V. uschackense (Murb.) Hub.-Mor.‘un topraküstü; V. lasianthum Boiss.‘un çiçekli kısımlarının metanol ekstreleri, standart bakteri suşları Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27853), Staphylococcus aureus (ATCC 29213), Enterococcus faecalis (ATCC 29212) ve standart mantar suşları olan Candida albicans ATCC 90028, Candida parapsilosis ATCC 90018 ve Candida krusei’ye karşı, Klinik ve Laboratuvar Standartları Kurumu’nun önerdiği disk difüzyon metodu ile test edilmiştir. V. mucronatum Lam. ve V. olympicum Boiss. gram pozitif bakteri S. aureus’a karşı antibakteriyel, V. latisepalum Hub.-Mor. ise C.krusei’ye karşı antifungal aktivite gösterirken, diğer türler herhangi bir aktivite göstermemiştir. Anahtar Kelimeler: Verbascum dudleyanum, V. lasianthum, V. latisepalum, V. mucronatum, V. olympicum, V. stachydifolium, V. uschackense, Scrophulariaceae, Antimikrobiyal Aktivite * Hacettepe University, Faculty of Pharmacy, Department of Pharmacognosy, Ankara, Turkey ** Hacettepe University, Faculty of Pharmacy, Department of Pharmaceutical Microbiology, Ankara, Turkey *** Hacettepe University, Faculty of Pharmacy, Department of Pharmaceutical Botany, Ankara, Turkey. ° Corresponding Author E-mail: itatli@hacettepe.edu.tr