| The influence of modified atmospheres and their interaction with water activity on the radial growth and fumonisin B(1) production of Fusarium verticillioides and F. proliferatum on corn. Part II: The effect of initial headspace oxygen concentration. | |
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MedLine Citation:
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PMID: 17084934 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This paper is the second in a series of two that describe the effect of modified atmospheres on the growth and mycotoxin production of Fusarium verticillioides and Fusarium proliferatum on corn. In this part, the effect of initial headspace (IH) oxygen concentration and its interaction with water activity (a(w)) on growth and fumonisin B(1) production was investigated. In addition, the impact of vacuum packaging and in-cooperation of O(2) scrubbing sachets was also studied. It was observed that at all a(w) values studied, reduction of IH O(2) concentration from 20 to 2% had no significant effect on the colony growth rate (g, mm d(-1)) and lag phase duration (lambda, d). However, g and lambda were positively and negatively correlated to a(w). The IH O(2) concentration was determined to have a a(w) dependent effect on the oxygen consumption rate. Although the maximum colony diameter (D(max), mm) decreased with the reduction of the IH O(2) level, the greatest mycelial density occurred at 10% IH O(2) for both isolates. This observation was accompanied by a trend of a decrease in the value of the IH O(2) level at which the most fumonisin B(1) was produced from 15 to 5% when the a(w) was decreased from 0.976 to 0.930 for F. verticillioides. For F. proliferatum the optimum conditions for fumonisin B(1) production shifted from 20% at a(w) 0.976 to 10% at both 0.951 and 0.930. Vacuum packaging and the in-cooperation of O(2) absorbing sachets completely inhibited the growth of both isolates. These results together with those reported in Part I of the study indicate that O(2) should preferably be completely excluded from modified atmospheres that are employed to protect stored corn from fungal growth and mycotoxin production. |
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Authors:
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S Samapundo; B De Meulenaer; A Atukwase; J Debevere; F Devlieghere |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2006-11-07 |
Journal Detail:
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Title: International journal of food microbiology Volume: 113 ISSN: 0168-1605 ISO Abbreviation: Int. J. Food Microbiol. Publication Date: 2007 Feb |
Date Detail:
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Created Date: 2007-01-26 Completed Date: 2007-03-20 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8412849 Medline TA: Int J Food Microbiol Country: Netherlands |
Other Details:
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Languages: eng Pagination: 339-45 Citation Subset: IM |
Affiliation:
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Ghent University, Faculty of Bioscience Engineering, Department of Food Safety and Food Quality, Laboratory of Food Microbiology and Food Preservation, Coupure Links 653, 9000 Gent, Belgium. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Colony Count, Microbial Consumer Product Safety Food Contamination / analysis Food Packaging / methods* Fumonisins / analysis* Fusarium / growth & development*, metabolism* Kinetics Oxygen / metabolism Vacuum* Water / metabolism Zea mays / microbiology* |
| Chemical | |
Reg. No./Substance:
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0/Fumonisins; 116355-83-0/fumonisin B1; 7732-18-5/Water; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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