KMID : 1007520080170040892
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Food Science and Biotechnology 2008 Volume.17 No. 4 p.892 ~ p.894
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Microbiological Analysis of Dongchimi, Korean Watery Radish Kimchi, at the Early and Mid-phase Fermentation
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Park Sun-Jung
Cha Seong-Kwan Moon Gi-Seong Chang Jin-Hee
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Abstract
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During dongchimi fermentation at 5 and 25¡É, the pH lowered slowly and reached 4.03 at 5¡É after 30 days, whereas it lowered dramatically and reached 3.59 at 25¡É after 2 days. The predominant bacteria were Leuconostoc (Leu.) mesenteroides at 25¡É until day 2 which changed into Lactobacillus (Lb.) plantarum at day 3, analyzed by a culture dependent method with partial 16S rRNA gene sequencing, whereas Leu. mesenteroides occupied predominantly at 5¡É until day 7. In a culture-independent method using a polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) with partial 16S rRNA gene sequencing, Lb. algidus was predominant at 5¡É until day 7 and Lb. plantarum occupied predominantly at 25¡É until day 3, which is different from the results of the culture based method, indicating the both methods need to be combined for accuracy. Based on the culture-dependent method, Leu. mesenteroides might be responsible for the early and mid-phase of dongchimi fermentation.
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KEYWORD
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dougchimi, kimchi fermentation, Leuconostoc mesenteroides, denaturing gradient gel electrophoresis (DGGE)
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