Chemical Composition, Enantiomeric Analysis, AEDA Sensorial Evaluation and Antifungal Activity of the Essential Oil from the Ecuadorian Plant Lepechinia muticaBenth (Lamiaceae)

This study describes the GC-FID,GC/MS,GC-O, and enantioselective GC analysis of the essential oil hydrodistilled from leaves of Lepechinica mutica (Lamiaceae), collected in Ecuador. GC-FID and GC/MS analyses allowed the characterization and quantification of 79 components, representing 97.3% of the...

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Bibliographic Details
Published inChemistry & biodiversity Vol. 14; no. 12
Main Authors Ramirez, Jorge, Gilardoni, Gianluca, Jacome, Miriam, Montesinos, José, Rodolfi, Marinella, Guglielminetti, Maria Lidia, Cagliero, Cecila, Bicchi, Carlo, Vidari, Giovanni
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 01.12.2017
Subjects
Antifungal activity
Aroma
Chemical composition
Dilution
Enantiomers
Essential oils
Fungicides
Hydrocarbons
Lamiaceae
Leaves
Monoterpenes
Monoterpenoids
Odorants
Odors
Oils & fats
Sensory evaluation
Sesquiterpenes
Volatile compounds
Volatiles
α-Pinene
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Summary:This study describes the GC-FID,GC/MS,GC-O, and enantioselective GC analysis of the essential oil hydrodistilled from leaves of Lepechinica mutica (Lamiaceae), collected in Ecuador. GC-FID and GC/MS analyses allowed the characterization and quantification of 79 components, representing 97.3% of the total sample. Sesquiterpene hydrocarbons (38.50%) and monoterpene hydrocarbons (30.59%) were found to be the most abundant volatiles, while oxygenated sesquiterpenes (16.20%) and oxygenated monoterpenes (2.10%) were the minor components. In order to better characterize the oil aroma, the most important odorants, from the sensorial point of view, were identified by Aroma Extract Dilution Analysis (AEDA) GC-O. They were [alpha]-Pinene, [beta]-Phellandrene, and Dauca-5,8-diene, exhibiting the characteristic woody, herbaceus, and earthy odors, respectively. Enantioselective GC analysis of L. mutica essential oil revealed the presence of twelve couples and two enantiomerically pure chiral monoterpenoids. Their enantiomeric excesses were from a few percent units to 100%. Moreover, the essential oil exhibited moderate in vitro activity against five fungal strains, being especially effective against M. canis, which is a severe zoophilic dermatophyte causal agent of pet and human infections.
ISSN:1612-1872
1612-1880
DOI:10.1002/cbdv.201700292