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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730
EISSN: 2072-6589
Vol. 3, No. 4, 1995, pp. 511-517
Bioline Code: cs95070
Full paper language: English
Document type: Research Article
Document available free of charge

African Crop Science Journal, Vol. 3, No. 4, 1995, pp. 511-517

 en Inhibition of Aspergillus parasiticus check for this species in other resources Growth and Aflatoxin Production by Some Essential Oils
Daw, Z.Y.; El-Baroty, G.E. & Mahmoud, E.A.

Abstract

The essential oils of lemon grass, geranium, sweet margorum, Brazilian pepper tree, santinica and hazanbil leaves were obtained by steam distillation. The chemical composition of these oils was elucidated by gas liquid chromatography. The essential oils under study were distinguished by having basic components belonging to different organic classes, i.e., aliphatic aldehydes, aliphatic alcohols, cyclic monoterpene alcohol, aromatic hydrocarbons and aliphatic hydrocarbons for lemon grass, geranium, sweet margorum, Brazilian pepper tree, gantonica and hazanbal, respectively. The influence of these essential oils at different levels on Aspergillus parasiticus check for this species in other resources growth and aflatoxin production was evaluated. The fungus was allowed to grow on a yeast extract-sucrose media in a stationary culture incubated in the dark at 26± 1°C for 7 days. Administration of the essential oils caused a concomitant decrease in both mycelial dry weight and aflatoxin production. This was entirely dose dependent. In general, the inhibition effect of the oils on A. parasiticus growth and aflatoxin production followed the sequence: lemon grass > geranium > sweet margorum > hazanbal > santonica > Brazilian pepper tree. It appears that there is a relationship between the chemical structure of the most abundant substances in the essential oils under study and the antifungal potency.

Keywords
Antifungal potency, chemical structure, organic compounds

 
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