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Please use this identifier to cite or link to this item: http://hdl.handle.net/10400.5/4287

Title: Changes in sour rotten grape berry microbiota during ripening and wine fermentation
Authors: Barata, A.
Malfeito-Ferreira, M.
Loureiro, V.
Keywords: damaged grapes
sour rot
acetic acid bacteria
lactic acid bacteria
wine fermentation
Issue Date: 2012
Publisher: Elsevier
Citation: "International Journal of Food Microbiology". ISSN 0168-1605. 154 (2012) 152-161
Abstract: This study investigated the microbiota of sour rotten wine grapes and its impact on wine fermentations. Yeasts, lactic acid bacteria (LAB) and acetic acid bacteria (AAB) were enumerated and identified on sound and sour rot grapes during the ripening stage. The alteration of the ecological balance induced by sour rot was particularly evidenced by the unequivocal increase of yeast and AAB counts on rotten grapes, since the beginning of ripening. Yeast and AAB species diversity in rotten grape samples were much higher than those found in sound grapes. LAB populations were low detected from both healthy and sour rotten grapes. The yeast species Issatchenkia occidentalis, Zygoascus hellenicus and Zygosaccharomyces bailii and the AAB species Gluconacetobacter hansenii, Gluconacetobacter intermedius and Acetobacter malorum, were recovered from damaged grapes and resulting grape juices in the winery. Acetobacter orleaniensis and Acetobacter syzygii were only recovered from sour rotten grapes. Dekkera bruxellensis and Oenococcus oeni were only recovered after wine fermentation induced by starter inoculation, irrespective of grape health, probably originating from cellar environment. After malolactic fermentation, racking and sulphur dioxide addition the only remaining species were the yeast Trigonopsis cantarellii and Saccharomyces cerevisiae, independently of the grape health status
Description: Available at ScienceDirect
Peer Reviewed: yes
URI: http://hdl.handle.net/10400.5/4287
ISSN: 0168-1605
Publisher version: www.elsevier.com/locate/ijfoodmicro
Appears in Collections:CBAA - Artigos de Revista

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