Affiliation:
1. Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
Abstract
Lactobacillus plantarum
, although able to grow in the presence of oxygen, was found to retain a completely anaerobic metabolism. Thus,
L. plantarum
did not consume detectable amounts of oxygen and did not contain measureable amounts of those enzyme activities which serve to protect anaerobic cells against the lethality of O
2
−
and of H
2
O
2
. Superoxide dismutase, catalase, and peroxidase appeared to be absent from these cells.
L. plantarum
was unusually resistant towards hyperbaric oxygen, indicating that it did not reduce oxygen even when exposed to high concentrations of this gas. A photochemical reaction mixture, known to generate O
2
−
, did kill
L. plantarum
. The lethality was diminished by superoxide dismutase, catalase, or mannitol and was augmented by H
2
O
2
. This suggests that the lethal agent generated in the photochemical system was primarily OH., generated from the reaction of O
2
−
with H
2
O
2
.
Publisher
American Society for Microbiology
Subject
Molecular Biology,Microbiology
Cited by
91 articles.
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