In:
Chemistry & Biodiversity, Wiley, Vol. 14, No. 6 ( 2017-06)
Abstract:
Essential oils ( EO s) from Eucalyptus globulus Labill . ssp. globulus and from Mediterranean autochthonous aromatic plants – Thymus mastichina L., Mentha pulegium L., Rosmarinus officinalis L., Calamintha nepeta (L.) Savi ssp. nepeta , Cistus ladanifer L., Foeniculum vulgare L., Dittrichia viscosa (L.) Greuter ssp. viscosa – were extracted by hydrodistillation and characterized by GC ‐ FID and NMR spectroscopy. EO s were evaluated for antimicrobial properties against several bacterial strains, using diverse methods, namely, the agar disc‐diffusion method, the microdilution method, the crystal violet assay and the Live/Dead staining for assessment of biofilm formation. Potential synergy was assessed by a checkerboard method. EO s of R. officinalis and C. ladanifer showed a predominance in monoterpene hydrocarbons ( 〉 60%); EO s of C. nepeta , M. pulegium , T. mastichina , E. globulus and F. vulgare were rich in oxygenated monoterpenes (62 – 96%) whereas EO of D. viscosa was mainly composed of oxygenated sesquiterpenes (54%). All EO s showed antimicrobial activity; M. pulegium and E. globulus generally had the strongest antimicrobial activity. EO of C. nepeta was the most promising in hampering the biofilm formation. The combinations D. viscosa / C. nepeta and E. globulus / T. mastichina were synergistic against Staphylococcus aureus . These results support the notion that EO s from the aromatic plants herein reported should be further explored as potential pharmaceuticals and/or food preservatives.
Type of Medium:
Online Resource
ISSN:
1612-1872
,
1612-1880
DOI:
10.1002/cbdv.201700006
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
2139001-0
SSG:
12
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