DNA-DNA hybridization studies performed by Dellaglio et
al. (63) showed that L. plantarum was quite heterogeneous,
since 8 strains (of the 28 strains investigated) displayed only 46
to 65% DNA relatedness to the type strain. These strains were
shown to be highly related to L. pentosus (63), a species which
was not included in the Approved Lists of Bacterial Names
(284). In 1987, the latter species name was revived by Zanoni
et al. (373). In 1991, Collins et al. (41) showed that the two
species shared more than 99% 16S rRNA sequence similarity.
Vescovo et al. (339) found that 13 of 24 presumed L. brevis
strains belonged to the species L. hilgardii, L. kefir, L. confusus,
or L. collinoides, which indicates that the identification of L.
brevis-like strains by carbohydrate fermentation reactions or
additional simple phenotypic tests is insufficient. Farrow and
Collins (94) investigated the genetic interrelationships of some
strains from the human oral cavity and saliva, earlier assigned
to L. brevis (54, 137, 139), and on the basis of nucleic acid and
biochemical data, the strains were assigned to a new species, L.
oris.
DNA-DNA hybridization studies performed by Dellaglio etal. (63) showed that L. plantarum was quite heterogeneous,since 8 strains (of the 28 strains investigated) displayed only 46to 65% DNA relatedness to the type strain. These strains wereshown to be highly related to L. pentosus (63), a species whichwas not included in the Approved Lists of Bacterial Names(284). In 1987, the latter species name was revived by Zanoniet al. (373). In 1991, Collins et al. (41) showed that the twospecies shared more than 99% 16S rRNA sequence similarity.Vescovo et al. (339) found that 13 of 24 presumed L. brevisstrains belonged to the species L. hilgardii, L. kefir, L. confusus,or L. collinoides, which indicates that the identification of L.brevis-like strains by carbohydrate fermentation reactions oradditional simple phenotypic tests is insufficient. Farrow andCollins (94) investigated the genetic interrelationships of somestrains from the human oral cavity and saliva, earlier assignedto L. brevis (54, 137, 139), and on the basis of nucleic acid andbiochemical data, the strains were assigned to a new species, L.oris.
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DNA-DNA hybridization studies performed by Dellaglio et
al. (63) showed that L. plantarum was quite heterogeneous,
since 8 strains (of the 28 strains investigated) displayed only 46
to 65% DNA relatedness to the type strain. These strains were
shown to be highly related to L. pentosus (63), a species which
was not included in the Approved Lists of Bacterial Names
(284). In 1987, the latter species name was revived by Zanoni
et al. (373). In 1991, Collins et al. (41) showed that the two
species shared more than 99% 16S rRNA sequence similarity.
Vescovo et al. (339) found that 13 of 24 presumed L. brevis
strains belonged to the species L. hilgardii, L. kefir, L. confusus,
or L. collinoides, which indicates that the identification of L.
brevis-like strains by carbohydrate fermentation reactions or
additional simple phenotypic tests is insufficient. Farrow and
Collins (94) investigated the genetic interrelationships of some
strains from the human oral cavity and saliva, earlier assigned
to L. brevis (54, 137, 139), and on the basis of nucleic acid and
biochemical data, the strains were assigned to a new species, L.
oris.
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