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Título : Molecular ecology and polyphasic characterization of the microbiota associated with semi-dry processed coffee ( Coffea arabica L.)
Autor: Vilela, Danielle Marques
Pereira, Gilberto Vinícius de M.
Silva, Cristina Ferreira
Batista, Luís Roberto
Schwan, Rosane Freitas
Palavras-chave: Semi-dry processed coffee
Microbiota
ARDRA technique
PCR-DGGE
Yeasts
Bacteria
Coffee fermentation
Publicador: Elsevier
Data da publicação: 7-Ago-2010
Referência: VILELA, D. M. et al. Molecular ecology and polyphasic characterization of the microbiota associated with semi-dry processed coffee ( Coffea arabica L.). Food Microbiology, [S.l.], v. 27, p. 1128-1135, 2010.
Abstract: This work was aimed at isolating and identifying the microbiota present during the semi-dry method of coffee processing using polyphasic methods and to evaluate microbial diversity with PCR-GGE. Samples of Coffea arabica L. were collected during different processing stages in southern Minas Gerais, Brazil. The bacterial and fungal isolates were phenotypically characterised and grouped according to the ARDRA technique, in which the 16-23S and ITS1-5.8S regions of the rDNA were sequenced for species identification. The bacterial counts varied from 3.7 to 7 log CFU g -1. The yeast counts ranged from 3.4 to 6.9 log CFU g -1 , and the filamentous fungal population varied from 2 to 3.7 log CFU g-1. Bacillus subtilis, Escherichia coli, Enterobacter agglomerans, Bacillus cereus and Klebsiella pneumoniae were the predominant bacteria detected during the processing of the coffee, and Pichia anomala, Torulaspora delbrueckii and Rhodotorula mucilaginosa were the dominant yeasts. All of the yeast and bacterial species detected by PCR-DGGE were isolated using culture-dependent methods, with the exception of one uncultivable bacterial species. Aspergillus was the most common genus among the filamentous fungal isolates. The use of polyphasic methods allowed a better characterization of the microbiota that is naturally present in semi-dry processed coffee.
URI: http://www.sciencedirect.com/science/article/pii/S0740002010002091
http://repositorio.ufla.br/jspui/handle/1/10854
Idioma: en_US
Aparece nas coleções:DCA - Artigos publicados em periódicos

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