Benavidez Rozo ME, Patriarca A, Cabrera G, Fernández Pinto VE. [Determination of the profiles of secondary metabolites characteristic of Alternaria strains isolated from tomato].
Rev Iberoam Micol 2014;
31:119-24. [PMID:
24071643 DOI:
10.1016/j.riam.2013.09.002]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 07/03/2013] [Accepted: 09/03/2013] [Indexed: 11/23/2022] Open
Abstract
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.
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