Artículo
Water activity and temperature effects on growth and mycotoxin production by Alternaria alternata strains isolated from Malbec wine grapes
Prendes, Luciana Paola
; Zachetti, Vanessa Gimena Lourdes
; Pereyra, A.; Morata, Vilma Ines
; Ramirez, Maria Laura
Fecha de publicación:
02/2017
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Journal of Applied Microbiology
ISSN:
1364-5072
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Aims: To study the effects of water activity (aW; 0·99, 0·98, 0·97, 0·96 and 0·95), temperature (15, 25 and 30°C), incubation time (7–28 days), and their interactions on mycelial growth and alternariol (AOH), alternariol monomethyl ether (AME) and tenuazonic acid (TA) mycotoxin production on a synthetic nutrient (SN) media similar to grape composition by three strains of Alternaria alternata isolated from wine grapes from Argentina. Methods and Results: Interacting conditions of aW, temperature and time of incubation were used to examine growth and mycotoxin production. All strains were able to grow at 0·95 aW, but maximum growth rates were obtained at 0·99 aW and 25°C. Maximum levels of AOH, AME and TA were obtained at 0·99 aW and 25°C, but high amounts of TA were also obtained at 0·96 aW and 15 or 30°C. Production of AOH and AME was favoured over TA at 25°C. TA levels were more sustained than AOH and AME. Conclusion: The optimum and marginal conditions for growth and mycotoxin production by A. alternata on a SN media similar to grape composition were in agreement, but certain stressful conditions for growth evaluated also promote mycotoxin production. Significance and Impact of the Study: Temperature and aW conditions that allows growth and mycotoxin production are those normally found during wine grape ripeness in the field. Therefore, efforts should be made to prevent Alternaria presence and mycotoxin production in wine grapes.
Palabras clave:
Alternaria Alternata
,
Growth
,
Mycotoxins
,
Temperature
,
Water Activity
,
Wine Grapes
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - MENDOZA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MENDOZA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MENDOZA
Citación
Prendes, Luciana Paola; Zachetti, Vanessa Gimena Lourdes; Pereyra, A.; Morata, Vilma Ines; Ramirez, Maria Laura; Water activity and temperature effects on growth and mycotoxin production by Alternaria alternata strains isolated from Malbec wine grapes; Wiley Blackwell Publishing, Inc; Journal of Applied Microbiology; 122; 2; 2-2017; 481-492
Compartir
Altmétricas