Impact of antagonistic yeasts from wine grapes on growth and mycotoxin production by Alternaria alternata
| Autor: | Maria Laura Ramirez, Luciana P. Prendes, V.G.L. Zachetti, María Gabriela Merín, A. Pereyra, V.I. Morata de Ambrosini |
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| Rok vydání: | 2021 |
| Předmět: |
Wine
Biology Applied Microbiology and Biotechnology Alternaria alternata Wine grape Hanseniaspora Lactones 03 medical and health sciences chemistry.chemical_compound Yeasts Antibiosis Vitis Mycotoxin 030304 developmental biology 0303 health sciences 030306 microbiology Alternaria General Medicine Mycotoxins biology.organism_classification Horticulture chemistry Fruit Saccharomycetales Biotechnology |
| Zdroj: | Journal of Applied Microbiology. 131:833-843 |
| ISSN: | 1365-2672 1364-5072 |
| DOI: | 10.1111/jam.14996 |
| Popis: | Alternaria alternata is a major contaminant of wine grapes, meaning a health risk for wine consumers due to the accumulation of toxic metabolites. To develop a successful biofungicide, the effectiveness of epiphytic wine grape yeasts against A. alternata growth and toxin production was assessed in vitro under temperature and aThe effect of 14 antagonistic yeasts was evaluated on growth and alternariol (AOH), alternariol monomethyl ether (AME) and tenuazonic acid (TA) production by three A. alternata strains in a synthetic medium with composition similar to grape (SN) at three temperatures (15, 25 and 30°C). All Metschnikowia sp. yeast strains evaluated completely prevented A. alternata growth and mycotoxin production at all temperatures in SN medium. Meanwhile, the growth inhibition exerted by Starmerella bacillaris yeast strains was higher at 30°C, followed by 25 and 15°C, being able to show a stimulating or inhibiting effect. Hanseniaspora uvarum yeast strains showed a growth promoting activity higher at 15°C, followed by 25 and 30°C. Even at conditions where A. alternata growth was stimulated by the S. bacillaris and H. uvarum yeasts, high inhibitions of mycotoxin production (AOH, AME and TA) were observed, indicating a complex interaction between growth and mycotoxin production.There is a significant influence of temperature on the effectiveness of biocontrol against A. alternata growth and mycotoxin production. Metschnikowia sp. strains are good candidates to compose a biofungicide against A. alternata.Among the different antagonistic yeasts evaluated, only Metschnikowia sp. strains were equally effective reducing A. alternata growth and mycotoxin at different temperatures underlining the importance of considering environmental factors in the selection of the antagonists. |
| Databáze: | OpenAIRE |
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