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|Título: ||Ochratoxigenic fungi associated with green coffee beans (Coffea arabica L.) in conventional and organic cultivation in Brazil|
|Autor(es): ||Rezende, E. F.|
Borge, J. G.
Cirillo, M. A.
Paiva, L. C.
Batista, L. R.
|Assunto: ||Aspergillus ochraceus|
|Publicador: ||Sociedade Brasileira de Microbiologia|
|Data de publicação: ||5-Jun-2012|
|Referência: ||REZENDE, E. F. et al. OchratoxigeniREZENDE, E. F. et al. Ochratoxigenic fungi associated with green coffee beans (Coffea arabica L.) in conventional and organic cultivation in Brazil. Brazilian Journal of Microbiology, São Paulo, v. 44, n. 2, p. 377-384, Oct. 2013.|
|Abstract: ||The genera Aspergillus comprises species that produce mycotoxins such as aflatoxins, ochratoxins
and patulin. These are cosmopolitan species, natural contaminants of agricultural products. In coffee
grains, the most important Aspergillus species in terms of the risk of presenting mycotoxins belong to
the genera Aspergillus Section Circumdati and Section Nigri. The purpose of this study was to assess
the occurrence of isolated ochratoxigenic fungi of coffee grains from organic and conventional culti-
vation from the South of Minas Gerais, Brazil, as well as to evaluate which farming system presents
higher contamination risk by ochratoxin A (OTA) produced by fungi. Thirty samples of coffee grains
(Coffea arabica L.) were analysed, being 20 of them of conventional coffee grains and 10 of them or-
ganic. The microbiological analysis was done with the Direct Plating Technique in a Dichloran Rose
Bengal Chloramphenicol Agar (DRBC) media. The identification was done based on the macro and
micro morphological characteristics and on the toxigenic potential with the Plug Agar technique.
From the 30 samples analysed, 480 filamentous fungi of the genera Aspergillus of the Circumdati
and Nigri Sections were isolated. The ochratoxigenic species identified were: Aspergillus
auricoumus, A. ochraceus, A. ostianus, A. niger and A. niger Aggregate. The most frequent species
which produces ochratoxin A among the isolated ones was A. ochraceus, corresponding to 89.55%.
There was no significant difference regarding the presence of ochratoxigenic A. ochreceus between
the conventional and organic cultivation systems, which suggests that the contamination risk is simi-
lar for both cultivation systems.|
|Aparece nas coleções: ||DCA - Artigos publicados em periódicos|
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