Antimicrobial and lipase inhibition of essential oil and solvent extracts of Cota tinctoria var. tinctoria and characterization of the essential oil

Authors: İSHAK ERİK, GÖZDE BOZDAL, SILA ÖZLEM ŞENER, BÜŞRA KORKMAZ, ŞENGÜL ALPAY KARAOĞLU, SALİH TERZİOĞLU, NURETTİN YAYLI

Abstract: The essential oil (EO) of Cota tinctoria var. tinctoria was analyzed using GC-FID / MS. A total of 51 compounds were determined from this taxon, accounting for 99.79% in hydrodistillation. Monoterpenes were the primary chemical class for the volatile organic compounds in the EO (36.1%, 13 compounds). Borneol (18.1%), camphor (14.9%), and β-pinene (11.3%) were the major components in the EO of C. tinctoria var. tinctoria. The antimicrobial activities of EO and n-hexane, acetonitrile, methanol, and water solvent extracts of the taxon were screened in vitro against ten microorganisms. The EO yielded the best activity (15 mm, 372.5 MIC, 59600 μg/μL) against Mycobacterium smegmatis. The acetonitrile extract was the most active against the Staphylococcus aureus and Bacillus cereus with 274 μg/mL MIC value. IC₅₀ values for the lipase enzyme inhibitory activity of EO and solvent extracts (n-hexane, acetonitrile, methanol, and water) were found to be 59.80 ± 4.3285 μg/mL 68.28 ± 3.1215 μg/mL, 52.60 ± 3.7526 μg/mL, 48.73 ± 2.8265 μg/mL, and 99.50 ± 5.5678 μg/mL, respectively.

Keywords: Antimicrobial, Cota tinctoria var. tinctoria, GC-FID/MS, lipase inhibition, volatile compounds

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