Determination of the profiles of secondary metabolites characteristic of Alternaria strains isolated from tomato

Background: Many Alternaria species have been studied for their ability to produce bioactive secondary metabolites, such as tentoxin (TEN), some of which have toxic properties. The main food contaminant toxins are tenuazonic acid, alternariol (AOH), alternariol monomethyl ether (AME), altenuene, and...

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Detalles Bibliográficos
Autores principales: Benavidez Rozo, M.E., Patriarca, A., Cabrera, G., Fernández Pinto, V.E.
Formato: JOUR
Materias:
Alternaria
Metabolitos secundarios
Micotoxinas
Mycotoxins
Secondary metabolites
Tomate
Tomato
altenuene
alternariol
alternariol methyl ether
altertoxin i
altertoxin ii
altertoxin iii
mycotoxin
tenuazonic acid
unclassified drug
Alternaria alternata
Alternaria arborescens
Alternaria tenuissima
article
bacterial strain
chemotaxonomy
food spoilage
fungal structures
fungus isolation
high performance liquid chromatography
metabolite
nonhuman
plant fungus interaction
tomato
Argentina
classification
comparative study
food contamination
isolation and purification
metabolism
microbiological examination
microbiology
plant disease
secondary metabolism
species difference
tandem mass spectrometry
Chromatography, High Pressure Liquid
Food Contamination
Lycopersicon esculentum
Mycological Typing Techniques
Plant Diseases
Secondary Metabolism
Species Specificity
Tandem Mass Spectrometry
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_11301406_v31_n2_p119_BenavidezRozo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Background: Many Alternaria species have been studied for their ability to produce bioactive secondary metabolites, such as tentoxin (TEN), some of which have toxic properties. The main food contaminant toxins are tenuazonic acid, alternariol (AOH), alternariol monomethyl ether (AME), altenuene, and altertoxins i, ii and iii. Aims: To determine the profiles of secondary metabolites characteristic of Alternaria strains isolated from tomato for their chemotaxonomic classification. Methods: The profiles of secondary metabolites were determined by HPLC MS. Results: The Alternaria isolates obtained from spoiled tomatoes belong, according to their morphological characteristics, to the species groups Alternaria alternata, Alternaria tenuissima and Alternaria arborescens, with A. tenuissima being the most frequent. The most frequent profiles of secondary metabolites belonging to the species groups A. alternata (AOH, AME, TEN), A. tenuissima (AOH, AME, TEN, tenuazonic acid) and A. arborescens (AOH, AME, TEN, tenuazonic acid) were determined, with some isolates of the latter being able to synthesize AAL toxins. Conclusions: Secondary metabolite profiles are a useful tool for the differentiation of small spored Alternaria isolates not easily identifiable by their morphological characteristics. © 2013 Revista Iberoamericana de Micología.

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