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Chemical Composition and Antimicrobial Activity of the Essential Oil from the Edible Aromatic Plant Aristolochia delavayi
Author(s) -
Li ZhiJian,
Njateng Guy S. S.,
He WenJia,
Zhang HongXia,
Gu JianLong,
Chen ShanNa,
Du ZhiZhi
Publication year - 2013
Publication title -
chemistry and biodiversity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.427
H-Index - 70
eISSN - 1612-1880
pISSN - 1612-1872
DOI - 10.1002/cbdv.201300066
Subject(s) - antimicrobial , essential oil , aristolochiaceae , chemistry , decanal , food science , alpha pinene , traditional medicine , botany , biology , limonene , organic chemistry , medicine
The essential oil obtained by hydrodistillation from the aerial parts of Aristolochia delavayi Franch. (Aristolochiaceae), a unique edible aromatic plant consumed by the Nakhi (Naxi) people in Yunnan, China, was investigated using GC/MS analysis. In total, 95 components, representing more than 95% of the oil composition, were identified, and the main constituents found were ( E )‐dec‐2‐enal (52.0%), ( E )‐dodec‐2‐enal (6.8%), dodecanal (3.35%), heptanal (2.88%), and decanal (2.63%). The essential oil showed strong inhibitory activity (96% reduction) of the production of bacterial volatile sulfide compounds (VSC) by Klebsiella pneumoniae , an effect that was comparable with that of the reference compound citral (91% reduction). Moreover, the antimicrobial activity of the essential oil and the isolated major compound against eight bacterial and six fungal strains were evaluated. The essential oil showed significant antibacterial activity against Providencia stuartii and Escherichia coli , with minimal inhibitory concentrations ( MIC ) ranging from 3.9 to 62.5 μg/ml. The oil also showed strong inhibitory activity against the fungal strains Trichophyton ajelloi, Trichophyton terrestre, Candida glabrata, Candida guilliermondii , and Cryptococcus neoformans , with MIC values ranging from 3.9 to 31.25 μg/ml, while ( E )‐dec‐2‐enal presented a lower antifungal activity than the essential oil.