title: Chemical composition, antimicrobial and antioxidant activities of the essential oils of Sideritis erythrantha Boiss. and Heldr. (var. erythrantha and var. cedretorum P.H. Davis) endemic in Turkey.
abstract: In the present study, chemical compositions, antimicrobial and antioxidant activities of the essential oils of Sideritis erythrantha var. erythrantha (SE) and Sideritis erythrantha var. cedretorum (SC), which are endemic taxa in Turkey, were investigated. The essential oils obtained by hydrodistillation were analyzed by gas chromatography-mass spectrometry (GC-MS). α-Pinene was the major component of the essential oils of SC and SE. SC essential oil was as effective as antibiotic against methicillin-resistant Staphylococcus aureus (MRSA), vancomycin resistant Enterococcus faecalis (VRE), ampicillin resistant Haemophilusinfluenzae and vancomycin sensitive E. faecalis. Similarly, SE essential oil was also as effective as antibiotic against VRE and ampicillin resistant H. influenzae. Antioxidant activities of the essential oils of SC and SE were determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH), β-carotene/linoleic acid and reducing power. Both essential oils exhibited weak antioxidant activity. This is the first report on antimicrobial and antioxidant activities of the essential oils of SC and SE.
authors.affiliation: Department of Biology, Faculty of Sciences and Arts, Akdeniz University, Antalya 07058, Turkey. elifkose@gmail.com
authors.forename: Elif Odabaş
authors.initials: EO
authors.lastname: Köse
authors.forename: Ismail Gökhan
authors.initials: IG
authors.lastname: Deniz
authors.forename: Cengiz
authors.initials: C
authors.lastname: Sarıkürkçü
authors.forename: Ozgür
authors.initials: O
authors.lastname: Aktaş
authors.forename: Mustafa
authors.initials: M
authors.lastname: Yavuz
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry* / Q000494:pharmacology*; D000975:Antioxidants / Q000737:chemistry* / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects; D001713:Biphenyl Compounds / Q000737:chemistry; D016166:Free Radical Scavengers / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D019787:Linoleic Acid / Q000737:chemistry; D008826:Microbial Sensitivity Tests; D009822:Oils, Volatile / Q000737:chemistry* / Q000494:pharmacology*; D010851:Picrates / Q000737:chemistry; D019163:Reducing Agents / Q000737:chemistry; D031365:Sideritis / Q000737:chemistry*; D014421:Turkey; D019207:beta Carotene / Q000737:chemistry
chemical_list: D000890:Anti-Infective Agents; D000975:Antioxidants; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D009822:Oils, Volatile; D010851:Picrates; D019163:Reducing Agents; D019207:beta Carotene; D019787:Linoleic Acid; C004931:1,1-diphenyl-2-picrylhydrazyl