| Impact of acetaldehyde and pyruvic acid bound sulfur dioxide on wine lactic acid bacteria. | |
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MedLine Citation:
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PMID: 22150460 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Aims: To investigate the impact of acetaldehyde and pyruvic acid bound sulfur dioxide on wine lactic acid bacteria. Methods and Results: Growth studies were performed where Oenococcus oeni, Pediococcus parvulus, P. damnosus, and Lactobacillus hilgardii were inoculated into media containing various concentrations of acetaldehyde or pyruvic acid and an equimolar concentration of SO(2) at pH 3.50 and 3.70. Low concentrations of acetaldehyde and pyruvic acid bound SO(2) were inhibitory to the growth of all bacteria although acetaldehyde bound SO(2) was generally more inhibitory than pyruvic acid bound SO(2) . Inhibition was greater at pH 3.50 than 3.70 and L. hilgardii was the most sensitive to acetaldehyde bound SO(2) while O. oeni was the most sensitive to pyruvic acid bound SO(2) . Degradation of SO(2) bound acetaldehyde was observed for all LAB and aside from O. oeni there was also complete degradation of SO(2) bound pyruvic acid at both pH values. O. oeni only degraded pyruvic acid at pH 3.70. Degradation of SO(2) bound acetaldehyde or pyruvic acid did not correlate with bacterial growth as inhibition was always observed in media containing bound SO(2) . Conclusions: Acetaldehyde and pyruvic acid bound SO(2) was inhibitory to wine LAB growth at concentrations as low as 5 mg l(-1) . Despite this inhibition, all wine LAB degraded SO(2) bound acetaldehyde and pyruvic acid suggesting that bound SO(2) may have a bacteriostatic rather than bacteriocidal action. Significance and Impact of Study: SO(2) bound to acetaldehyde or pyruvic acid is inhibitory to growth of wine LAB and must be considered when conducting the malolactic fermentation or controlling the growth of spoilage bacteria such as Pediococcus and Lactobacillus. |
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Authors:
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A Wells; J P Osborne |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-12 |
Journal Detail:
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Title: Letters in applied microbiology Volume: - ISSN: 1472-765X ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8510094 Medline TA: Lett Appl Microbiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 The Society for Applied Microbiology. |
Affiliation:
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Department of Food Science and Technology, Oregon State University, Corvallis, OR, 97331, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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