Effects of some natural volatile compounds on the pathogenic fungiAlternaria alternata andBotrytis cinerea |
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| Authors: | T. R. Hamilton-Kemp C. T. McCracken Jr. J. H. Loughrin R. A. Andersen D. F. Hildebrand |
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| Affiliation: | (1) Department of Horticulture, University of Kentucky, 40546 Lexington, Kentucky;(2) U.S. Department of Agriculture, ARS, and Department of Agronomy, University of Kentucky, 40546 Lexington, Kentucky;(3) Department of Agronomy, University of Kentucky, 40546 Lexington, Kentucky |
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| Abstract: | A bioassay system was developed to test the effects of volatile compounds on the growth of hyphae from germinating fungal spores. Volatiles from crushed tomato leaves inhibited hyphal growth of two fungal pathogens,Alternaria alternata andBotrytis cinerea. Aldehydes, including C6 and C9 compounds formed by the lipoxygenase enzyme pathway upon wounding leaves, inhibited growth of both fungal species. Terpene hydrocarbons, 2-carene and limonene, had no significant effect on hyphal growth. The quantities of volatile compounds in the vapor phase of the bioassay system were measured by direct headspace sampling and GC analysis. |
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| Keywords: | Headspace aldehydes E-2-hexenal monoterpenes lipoxygenase spores hyphae wounding Lycopersicon esculentum Alternaria alternata Botrytis cinerea |
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