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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(3): 797-808
DOI: https://doi.org/10.20546/ijcmas.2019.803.097


Chemical Composition of the Essential Oil of Curcuma longa and Evaluation of the Antifungal Activity on Rhizopus stolonifer and Penicillium sp. Responsible Fungi for Post-harvest Rot of Dioscorea rotoundata in Cameroon
Evariste Josué Momo1, 2, Monique Liliane Sen1, Séverin Tchameni Nguemezi1, Olivier Youassi Youassi1, Francis Mounbain1, Modeste Lambert Sameza1, François Tchoumbougnang3 and Pierre Michel Jazet1*
1Laboratory of Biochemistry, Department of Biochemistry, Faculty of Sciences, University of Douala, PO Box 24157, Douala, Cameroon
2School of Wood, water and Natural resources, University of Dschang, P.O. Box 786, Ebolowa, Cameroon
3Institute of Fisheries Science (Yabassi), University of Douala, BP: 7236, Douala, Cameroon
*Corresponding author
Abstract:

This study focused its investigation on the use of the essential oil of a culinary and medicinal plant commonly used in Cameroon, Curcuma longa also called red ginger for the protection of white yam (Discorea rotoundata) during storage. The oil was obtained by hydro distillation using Clevenger apparatus with a yield of 0.26%, the chemical composition analysis revealed a predominance of oxygenated sesquiterpens (OST 63.43%) with as major compound α-bisabolol (42.87%), E-β-santalol (15.3%), β-cymene (8.22%). Fungi isolated from apparently healthy yam tubers were identified as Rhizopus stolonifer and Penicillium sp., In vitro and in situ oil activity was evaluated. The oil completely inhibited the growth of in vitro pathogens at 1150 and 6000 ppm respectively for Rhizopus stolonifer and Penicillium sp., the oil being more active on Rhizopus stolonifer. In situ tests were carried out only with this fungus. The essential oil of Curcuma longa has significantly reduced the rot caused by this pathogen, a reduction of 87.26% and 87.8% was obtained for the preventive and curative tests respectively. No significant difference in activity was observed in both tests. However, there is a significant difference (P ≤ 0.0001) in activity between the essential oil and the reference fungicide at the recommended concentration. As concerning the activity of this essence, the red ginger essential oil could be used as a biofungicide for the protection of yam tubers preserved against R. stolonifer, the most formidable fungus of rot white yam in Cameroon.


Keywords: Essential oil, Curcuma longa, Rhizopus stolonifer, Penicillium sp. Dioscorea rotoundata
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Evariste Josué Momo, Monique Liliane Sen, Séverin Tchameni Nguemezi, Olivier Youassi Youassi, Francis Mounbain, Modeste Lambert Sameza, François Tchoumbougnang and Pierre Michel Jazet. 2019. Chemical Composition of the Essential Oil of Curcuma longa and Evaluation of the Antifungal Activity on Rhizopus stolonifer and Penicillium sp. Responsible Fungi for Post-harvest Rot of Dioscorea rotoundata in Cameroon.Int.J.Curr.Microbiol.App.Sci. 8(3): 797-808. doi: https://doi.org/10.20546/ijcmas.2019.803.097