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Applied and Environmental Microbiology, June 2002, p. 2877-2884, Vol. 68, No. 6
0099-2240/02/$04.00+0 DOI: 10.1128/AEM.68.6.2877-2884.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.
Department of Food Science, Southeast Dairy Foods Research Center,1 United States Department of Agriculture Agricultural Research Service,3 Department of Food Science, North Carolina State University, Raleigh, North Carolina 27695,4 Department of Biological Resources and Technology, Yonsei University, Wonju 220-710, South Korea2
Received 13 December 2001/ Accepted 13 March 2002
Lactic acid bacterial strains were isolated from brines sampled after 7 days of an industrial sauerkraut fermentation, and six strains were selected on the basis of susceptibility to bacteriophages. Bacterial growth in cabbage juice was monitored, and the fermentation end products were identified, quantified, and compared to those of Leuconostoc mesenteroides. Identification by biochemical fingerprinting, endonuclease digestion of the 16S-23S intergenic transcribed spacer region, and sequencing of variable regions V1 and V2 of the 16S rRNA gene indicated that the six selected sauerkraut isolates were Leuconostoc fallax strains. Random amplification of polymorphic DNA fingerprints indicated that the strains were distinct from one another. The growth and fermentation patterns of the L. fallax isolates were highly similar to those of L. mesenteroides. The final pH of cabbage juice fermentation was 3.6, and the main fermentation end products were lactic acid, acetic acid, and mannitol for both species. However, none of the L. fallax strains exhibited the malolactic reaction, which is characteristic of most L. mesenteroides strains. These results indicated that in addition to L. mesenteroides, a variety of L. fallax strains may be present in the heterofermentative stage of sauerkraut fermentation. The microbial ecology of sauerkraut fermentation appears to be more complex than previously indicated, and the prevalence and roles of L. fallax require further investigation.
Paper no. FSR01-26 of the Journal Series of the Department of Food Science, North Carolina State University, Raleigh.
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