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• W2044765997 abstract "Two Aureobasidium pullulans strains (L1 and L8), effective against some fruit postharvest pathogens were evaluated for VOCs production as a part of their modes of action towards five pathogens (Botrytis cinerea, Colletotrichum acutatum, Penicillium expansum, Penicillium digitatum and Penicillium italicum). The VOCs were assayed with a double petri dish assay against conidia germination of target pathogens. Results obtained showed that the VOCs generated by the antagonists inhibited significantly the conidia germination of all pathogens compared to the control. In particular, the conidia germination of all Penicillium was completely inhibited by VOCs produced by L1 and L8. In in vivo tests, apples and oranges were artificially inoculated with pathogen conidia and then biofumigated with VOCs emitted by both antagonists. The antagonistic treatment controlled significantly pathogen infection, confirming the results obtained in vitro tests. The best L1 and L8 VOCs activity was observed on apple inoculated with B. cinerea where the lesion diameter reduction observed was greater than the 88%. The compounds emitted by L1 and L8 strains were identified with the solid-phase microextraction (SPME)–gas chromatographic technique. Compounds as 2-phenyl, 1-butanol-3-methyl, 1-butanol-2-methyl and 1-propanol-2-methyl belonging to the group of alcohols were mainly produced for both strains, in the first 96 h of growth. These compounds were confirmed by comparison with standards. The pure compounds of VOCs cited above were used to determine the EC50 values for conidia germination of pathogens. The 1-propanol-2-methyl was the VOC least active against all tested fungi, with the EC50 values over 0.8 μl ml−1, while the 2-phenethyl alcohol was the most active with EC50 values lower than 0.8 μl ml−1, except for the C. acutatum (1.97 μl ml−1). The present study demonstrated, for the first time, that the production of VOCs could play an essential role in the antagonistic activity of two A. pullulans strains against five fruit postharvest pathogens." @default.
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• W2044765997 date "2015-02-01" @default.
• W2044765997 modified "2023-10-14" @default.
• W2044765997 title "Production of volatile organic compounds by Aureobasidium pullulans as a potential mechanism of action against postharvest fruit pathogens" @default.
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• W2044765997 doi "https://doi.org/10.1016/j.biocontrol.2014.10.004" @default.
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