We chose kimchi made from Chinese cabbage for
this study since it is the most popular type of kimchi in
Korea. The overall bacterial community structures of
the five commercial kimchi samples are summarized in
Table 1. Of 348 clones examined, only one (KMD-0-
40) was identified as non-LAB and assigned a unique
phyletic line equivalent to a novel genus in the family
Caulobacteraceae (data not shown). This alpha-protobacterial
clone showed a close relationship to an
uncultured clone from insect (Zophobas mori) larval
intestine, with 99.3% similarity. Forty-six percent of
the LAB clones consisted of species of the genus
Weissella, followed by Leuconostoc (39%) and Lactobacillus
(15%). W. koreensis was the only species
found in all kimchi samples, and it was generally the
most abundant. We did not find in our clone libraries
Pediococcus spp. and Enterococcus faecalis, which
had been reported in kimchi by culture-dependent
studies (Mheen and Kwon, 1984; Lim et al., 1989; Lee
et al., 1992; Shin et al., 1996). This discrepancy is
probably due to inaccurate identification in those
studies, which depended on morphology and rather
few biochemical tests. Those particular bacteria may
also be more easily cultured than other LAB.
We chose kimchi made from Chinese cabbage forthis study since it is the most popular type of kimchi inKorea. The overall bacterial community structures ofthe five commercial kimchi samples are summarized inTable 1. Of 348 clones examined, only one (KMD-0-40) was identified as non-LAB and assigned a uniquephyletic line equivalent to a novel genus in the familyCaulobacteraceae (data not shown). This alpha-protobacterialclone showed a close relationship to anuncultured clone from insect (Zophobas mori) larvalintestine, with 99.3% similarity. Forty-six percent ofthe LAB clones consisted of species of the genusWeissella, followed by Leuconostoc (39%) and Lactobacillus(15%). W. koreensis was the only speciesfound in all kimchi samples, and it was generally themost abundant. We did not find in our clone librariesPediococcus spp. and Enterococcus faecalis, whichhad been reported in kimchi by culture-dependentstudies (Mheen and Kwon, 1984; Lim et al., 1989; Leeet al., 1992; Shin et al., 1996). This discrepancy isprobably due to inaccurate identification in thosestudies, which depended on morphology and ratherfew biochemical tests. Those particular bacteria mayalso be more easily cultured than other LAB.
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