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Evento

Possible mechanisms of action of native yeasts against opportunistic spoilage fungi isolated from mature olive fruits

Pesce, Virginia MercedesIcon ; Nally, Maria CristinaIcon ; Pedrozo, Paula; Flores, Belén; Toro, Maria Eugenia; Castellanos, Lucia InesIcon ; Vazquez, Fabio
Tipo del evento: Jornada
Nombre del evento: 6ta Jornadas Sudamericanas de Biología y Biotecnología de Levaduras y 34º Simposio Internacional Especializado en Levaduras
Fecha del evento: 01/10/2018
Institución Organizadora: Universidad Nacional del Comahue; Instituto Andino Patagónico de Tecnologías Biológicas y Geoambientales; Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas;
Título del Libro: 6ta Jornadas Sudamericanas de Biología y Biotecnología de Levaduras y 34º Simposio Internacional Especializado en Levaduras
Editorial: Universidad Nacional del Comahue
Idioma: Inglés
Clasificación temática:
Biología Celular, Microbiología

Resumen

Some genera of fungi can affect the quality of mature olive fruits. Aspergillus is one of the opportunistic genera that caused rot and showed potential to produce mycotoxins in olive fruits and derivate products. Yeasts metabolism have presented several advantages as biocontrol agents and different modes of action against fungal pathogens. Elucidation of the possible antifungal mechanisms of yeasts could be used for optimization, formulation, and application of a biocontrol agent. The objective of the work was to determine possible mechanisms of action of native yeasts against A. niger, an opportunistic fungal pathogen of mature olive fruits. Thirteen native yeasts from vitivinicultural (6) and olivicultural (7) environments were employed in the tests since they had shown antagonistic activity at in vitro and on mature olive fruits against two opportunistic fungi belonging to A. niger species (BoAn1 and BoAn2). Four mechanisms of action were evaluated in vitro: a- production of volatile metabolites (V), b- antifungal killer activity (K), c-siderophore production (S), d- hydrolytic enzymes secretion: chitinase (Q) and laminarinase (L). Eleven yeasts presented at least two of the modes of action assayed. The killer activity and volatile metabolites production were the main mechanisms involved in the biocontrol activity of the native yeasts against A. niger. Wickerhamomyces anomalus Bo128, isolated from healthy olive fruit surfaces, presented all the antifungal mechanisms assayed against.
Palabras clave: Native yeasts , Spoilage fungi , Olive fruits
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/186223
URL: https://www.barilocheeventos.com/34o-international-specialized-symposium-on-yeas
Colecciones
Eventos(PROIMI)
Eventos de PLANTA PILOTO DE PROC.IND.MICROBIOLOGICOS (I)
Citación
Possible mechanisms of action of native yeasts against opportunistic spoilage fungi isolated from mature olive fruits; 6ta Jornadas Sudamericanas de Biología y Biotecnología de Levaduras y 34º Simposio Internacional Especializado en Levaduras; Bariloche; Argentina; 2018; 1-3
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