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Characterization of pectinase activity for enology from yeasts occurring in Argentine Bonarda grape.

Overview of attention for article published in Brazilian Journal of Microbiology, July 2015
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Title
Characterization of pectinase activity for enology from yeasts occurring in Argentine Bonarda grape.
Published in
Brazilian Journal of Microbiology, July 2015
DOI 10.1590/s1517-838246320140160
Pubmed ID
Authors

Merín, María Gabriela, Martín, María Carolina, Rantsiou, Kalliopi, Cocolin, Luca, de Ambrosini, Vilma Inés Morata

Abstract

Pectinolytic enzymes are greatly important in winemaking due to their ability to degrade pectic polymers from grape, contributing to enhance process efficiency and wine quality. This study aimed to analyze the occurrence of pectinolytic yeasts during spontaneous fermentation of Argentine Bonarda grape, to select yeasts that produce extracellular pectinases and to characterize their pectinolytic activity under wine-like conditions. Isolated yeasts were grouped using PCR-DGGE and identified by partial sequencing of 26S rRNA gene. Isolates comprised 7 genera, with Aureobasidium pullulans as the most predominant pectinolytic species, followed by Rhodotorula dairenensis and Cryptococcus saitoi. No pectinolytic activity was detected among ascomycetous yeasts isolated on grapes and during fermentation, suggesting a low occurrence of pectinolytic yeast species in wine fermentation ecosystem. This is the first study reporting R. dairenensis and Cr. saitoi species with pectinolytic activity. R. dairenensis GM-15 produced pectinases that proved to be highly active at grape pH, at 12 °C, and under ethanol and SO2 concentrations usually found in vinifications (pectinase activity around 1.1 U/mL). This strain also produced cellulase activity at 12 °C and pH 3.5, but did not produce β-glucosidase activity under these conditions. The strain showed encouraging enological properties for its potential use in low-temperature winemaking.

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Mendeley readers

The data shown below were compiled from readership statistics for 75 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Brazil 1 1%
Unknown 74 99%

Demographic breakdown

Readers by professional status Count As %
Researcher 10 13%
Student > Master 10 13%
Student > Ph. D. Student 9 12%
Student > Bachelor 8 11%
Professor 4 5%
Other 15 20%
Unknown 19 25%
Readers by discipline Count As %
Agricultural and Biological Sciences 21 28%
Biochemistry, Genetics and Molecular Biology 13 17%
Immunology and Microbiology 5 7%
Engineering 4 5%
Unspecified 3 4%
Other 7 9%
Unknown 22 29%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 29 September 2015.
All research outputs
#20,292,660
of 22,829,083 outputs
Outputs from Brazilian Journal of Microbiology
#837
of 1,117 outputs
Outputs of similar age
#219,626
of 263,405 outputs
Outputs of similar age from Brazilian Journal of Microbiology
#31
of 44 outputs
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