Article (Scientific journals)
Chemical composition and antimicrobial activity of essential oils of Ocimum basilicum, Ocimum canum and Ocimum gratissimum in function of harvesting time
Mith, Hasika; Yayi, Éléonore; Bokossa, Innocent et al.
2014In Journal of Essential Oil-Bearing Plants
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Keywords :
Essential oil; Ocimum basilicum; Ocimum canum; Ocimum gratissimum; antimicrobial activity; chemical composition
Abstract :
[en] BACKGROUND: The aim of present the study was to investigate the chemical composition and the antimicrobial activity of essential oils of Ocimum basilicum, Ocimum canum and Ocimum gratissimum from Benin as affected by harvesting time. The chemical composition of hydrodistillated essential oils were analyzed by GC-FID (gas chromatography – flame ionization detector) and GC-MS (gas chromatography-mass spectrometry). Disc diffusion and broth microdilution assays were used to evaluate the antibacterial activity of essential oils against two foodborne pathogens. RESULTS: Based on the composition analysis, major components were as follows: estragol (43.0 -44.7 %) and linalool (24.6 -29.8 %) in O. basilicum oils; carvacrol (12.0 -30.8 %) and p-cymene (19.5 -26.2 %) in O. canum oils; thymol (28.3 -37.7 %) and γ-terpinene (12.5 -19.3 %) in O. gratissimum oils. The tested oils and their components exhibited notable antimicrobial activities against Listeria monocytogenes and Salmonella typhimurium. The O. canum and O. gratissimum oils collected at 7h and 19h showed significant higher activities against L. monocytogenes and S. typhimurium (MICs and MBCs 0.34 – 2.5 µL/mL) (p < 0.05), whereas O. basilicum showed lower activity (MICs and MBCs 2.0 – 8.0 µL/mL) at any daytime of harvest, the weakest being at 19h (MIC and MBC 12.0 – 32.0 µL/mL). CONCLUSION: The daytime of harvest can influence the composition of oils and their activities on bacteria.
Disciplines :
Microbiology
Agriculture & agronomy
Author, co-author :
Mith, Hasika
Yayi, Éléonore
Bokossa, Innocent
Kpoviessi, Salomé
Quetin-Leclercq, Joëlle
Moudachirou, Mansour
Daube, Georges  ;  Université de Liège > Département de sciences des denrées alimentaires (DDA) > Microbiologie des denrées alimentaires
Clinquart, Antoine ;  Université de Liège > Département de sciences des denrées alimentaires (DDA) > Technologie des denrées alimentaires
Language :
English
Title :
Chemical composition and antimicrobial activity of essential oils of Ocimum basilicum, Ocimum canum and Ocimum gratissimum in function of harvesting time
Publication date :
2014
Journal title :
Journal of Essential Oil-Bearing Plants
ISSN :
0972-060X
eISSN :
0976-5026
Publisher :
H.K.L. Bhalla, Dehra Dun, India
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 March 2017

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