Inhibitory effects of the carrot metabolites 6-methoxymellein and falcarindiol on development of the fungal leaf blight pathogen Alternaria dauci

The in vitro effects of 6-MM and falcarindiol on the development of Alternaria dauci were analyzed. The results showed that A. dauci was significantly more susceptible to falcarindiol than to 6-MM. Experiments dealing with mixed solutions of 6-MM and falcarindiol indicated additive effects of the me...

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Bibliographic Details
Published in:Physiological and molecular plant pathology 2012-10, Vol.80, p.58-67
Main Authors: Lecomte, Mickaël, Berruyer, Romain, Hamama, Latifa, Boedo, Cora, Hudhomme, Piétrick, Bersihand, Stéphanie, Arul, Joseph, N’Guyen, Guillaume, Gatto, Julia, Guilet, David, Richomme, Pascal, Simoneau, Philippe, Briard, Mathilde, Le Clerc, Valérie, Poupard, Pascal
Format: Article
Language:English
Subjects:
additive effect
Alternaria dauci
Antifungal metabolites
Biological and medical sciences
carrots
Daucus
Daucus carota subsp. sativus L
Fundamental and applied biological sciences. Psychology
fungi
genotype
growth retardation
leaf blight
leaves
Life Sciences
metabolites
Nephelometry
Partial resistance
pathogens
Phytoalexin
Phytoanticipin
Phytopathology and phytopharmacy
Phytopathology. Animal pests. Plant and forest protection
plasma membrane
Polyacetylenes
Vegetal Biology
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Summary:The in vitro effects of 6-MM and falcarindiol on the development of Alternaria dauci were analyzed. The results showed that A. dauci was significantly more susceptible to falcarindiol than to 6-MM. Experiments dealing with mixed solutions of 6-MM and falcarindiol indicated additive effects of the metabolites on growth inhibition. Permeabilization of the fungal plasma membrane was observed after falcarindiol treatment. In planta quantification of 6-MM/falcarindiol was performed on inoculated leaves of carrot genotypes. Significantly faster 6-MM production was observed in Bolero (partially resistant to A. dauci) than in Presto (susceptible). The falcarindiol levels were significantly higher in Bolero than in Presto. ► Alternaria dauci is more susceptible to falcarindiol than to 6-MM. ► 6-MM and falcarindiol show additive effects on A. dauci growth inhibition. ► Treatment with falcarindiol provokes permeabilization of A. dauci plasma membrane. ► Falcarindiol levels are high in a carrot cv. partially resistant to A. dauci.
ISSN:0885-5765
1096-1178
DOI:10.1016/j.pmpp.2012.10.002