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Journal of Applied Microbiology
Article . 2013 . Peer-reviewed
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In vitroremoval of ochratoxin A by two strains ofSaccharomyces cerevisiaeand their performances under fermentative and stressing conditions

Authors: PETRUZZI, LEONARDO; BEVILACQUA, ANTONIO; BAIANO, ANTONIETTA; BENEDUCE, LUCIANO; CORBO, MARIA ROSARIA; SINIGAGLIA, MILENA GRAZIA RITA;

In vitroremoval of ochratoxin A by two strains ofSaccharomyces cerevisiaeand their performances under fermentative and stressing conditions

Abstract

The aim of this research was to study the effect of time, temperature, sugar content and addition of diammonium phosphate (DAP) on ochratoxin A (OTA) removal by two strains of Saccharomyces cerevisiae using a completely randomized design.The strains were grown in a medium containing OTA (2 μg l(-1)), two sugar levels (200 and 250 g l(-1)), with or without DAP (300 mg l(-1)), and incubated at 25-30°C. The yeasts were able to decrease the toxin amount by c. 70%, with the highest removing effect observed after 3 days at 30°C in the presence of 250 g l(-1) of sugars and with DAP; after 10 days, the toxin was partially released into the medium. The strains produced high ethanol and glycerol contents, showed high tolerance to single/combined stress conditions and possessed β-d-glucosidase, pectinase and xylanase activities.Ochratoxin A removal was affected by time, temperature, sugar and addition of DAP. Moreover, the phenomenon was reversible.Ochratoxin A removal could be an interesting trait for the selection of promising strains; however, the strains removing efficiently the toxin could release it back; thus, the selection of the starter should take into account both the removal and the binding ability of OTA.

Country
Italy
Related Organizations
Keywords

Glycerol, Ethanol, Molecular Sequence Data, Wine, Saccharomyces cerevisiae, Fermentation, Humans, Vitis

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
21
Top 10%
Average
Top 10%
bronze