GC-MS characterization of the essential oil from Teucrium kotschyanum Poech (Lamiaceae) and its antimicrobial assessment

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Gürer Ç. Ü., Tütüniş S. Y., Gülsoytoplan G., İŞCAN G., DEMİRCİ B., TAN N.

Records of Natural Products, vol.20, no.3, 2026 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 20 Issue: 3
  • Publication Date: 2026
  • Doi Number: 10.25135/rnp.2512.3750
  • Journal Name: Records of Natural Products
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, ABI/INFORM, EMBASE
  • Keywords: antimicrobial activity, essential oil, GC-MS, Lamiaceae, Teucrium kotschyanum Poech
  • Anadolu University Affiliated: Yes

Abstract

The genus Teucrium L., a member of the Lamiaceae family, is represented by approximately 36 species in Türkiye. In this study, the essential oil composition of the aerial parts of Teucrium kotschyanum Poech collected from İzmir (Ödemiş) was investigated by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) for the first time.ThemajorcompoundswereidentifiedasgermacreneD(20.0%),α-cadinol (6.9%), β-bourbonene (6.6%), hexadecanoic acid (6.6%), δ-cadinene (5.9%) and manool (4.1%). The antibacterial and antifungal activities of the essential oil were evaluated against six bacteria and six fungi using the microdilution broth method. The essential oil exhibited limited antimicrobial activity, with the highest efficacy observed against Candida utilis (MIC: 125 μg/mL) and the lowest against Staphylococcus epidermidis and Salmonella typhimurium (MIC: 2000 μg/mL).