Sensitivity of Synechococcus lividus to hydrogen peroxide

The effects of various H 2O 2 concentrations on the growth of the Cyanobacterium Synechococcus lividus are investigated. Cyanobacteria are highly resistant to H 2O 2; cell growth is affected by 10 −6 MH 2O 2 and lethality occurs at 10 −3M. Effects on cell proliferation were different depending on th...

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Bibliographic Details
Published in:Environmental and experimental botany 1985-01, Vol.25 (4), p.339-347
Main Authors: Dupouy, D., Conter, A., Croute, F., Murat, M., Planel, H.
Format: Article
Language:English
Subjects:
Action of physical and chemical agents on bacteria
Bacteriology
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Microbiology
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Summary:The effects of various H 2O 2 concentrations on the growth of the Cyanobacterium Synechococcus lividus are investigated. Cyanobacteria are highly resistant to H 2O 2; cell growth is affected by 10 −6 MH 2O 2 and lethality occurs at 10 −3M. Effects on cell proliferation were different depending on the duration of the hydrogen peroxide treatment; for the first hour growth was inhibited, at 24 hr growth was stimulated, and at 72 hr no effect was observed. These results are related to the presence of an H 2O 2 removal system (glutathione reductase) which is particularly effective at 24 hr. Possible mechanisms of H 2O 2 on algal metabolism are investigated and discussed.
ISSN:0098-8472
1873-7307
DOI:10.1016/0098-8472(85)90031-0