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Artículo

Characterization of small-spored Alternaria from Argentinean crops through a polyphasic approach

Da Cruz Cabral, Lucía Mariana; Rodriguero, Marcela SilvinaIcon ; Stenglein, Sebastian AlbertoIcon ; Nielsen, Kristian Fog; Patriarca, Andrea RosanaIcon
Fecha de publicación: 09/2017
Editorial: Elsevier Science
Revista: International Journal of Food Microbiology
ISSN: 0168-1605
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Alimentos y Bebidas

Resumen

Small-spored Alternaria have been isolated from a wide variety of food crops, causing both economic losses and human health risk due to the metabolites produced. Their taxonomy has been discussed widely, but no scientific consensus has been established in this field to date. Argentina is a major exporter of agricultural products, so it is essential to thoroughly understand the physiological behaviour of this pathogen in a food safety context. Thus, the objective of this work was to characterize small-spored Alternaria spp. obtained from tomato fruits, pepper fruits, wheat grains and blueberries from Argentina by a polyphasic approach involving metabolomic and phylogenetic analyses based on molecular and morphological characters. Morphological analysis divided the population studied into three groups; A. arborescens sp.-grp., A. tenuissima sp.-grp., and A. alternata sp.-grp. However, when these characters were simultaneously analysed with molecular data, no clearly separated groups were obtained. Haplotype network and phylogenetic analysis (both Bayesian and maximum parsimony) of a conserved region yielded the same result, suggesting that all isolates belong to the same species. Furthermore, no correlation could be established between morphological species-groups and a metabolite or group of metabolites synthesized. Thus, the whole set of analyses carried out in the present work supports the hypothesis that these small-spored Alternaria isolates from food belong to the same species. Identification at species level through classical morphology or modern molecular techniques does not seem to be a useful tool to predict toxicological risk in food matrices. The detection of any small-spored Alternaria from Section Alternaria (D.P. Lawr., Gannibal, Peever & B.M. Pryor 2013) in food implies a potential toxicological risk.
Palabras clave: Alternaria , Endopolygalacturonase Gene , Polyphasic Approach , Metabolites Profile , Food
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info:eu-repo/semantics/openAccess 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/11336/33824
URL: http://www.sciencedirect.com/science/article/pii/S0168160517302945
DOI: http://dx.doi.org/10.1016/j.ijfoodmicro.2017.06.026
Colecciones
Articulos(CCT - MAR DEL PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MAR DEL PLATA
Articulos(IEGEBA)
Articulos de INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BS. AS
Articulos(INBIOTEC)
Articulos de INSTITUTO DE INV. EN BIODIVERSIDAD Y BIOTECNOLOGIA
Articulos(INMIBO (EX - PROPLAME))
Articulos de INSTITUTO DE MICOLOGIA Y BOTANICA
Citación
Da Cruz Cabral, Lucía Mariana; Rodriguero, Marcela Silvina; Stenglein, Sebastian Alberto; Nielsen, Kristian Fog; Patriarca, Andrea Rosana; Characterization of small-spored Alternaria from Argentinean crops through a polyphasic approach; Elsevier Science; International Journal of Food Microbiology; 257; 9-2017; 206-215
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