Survival of Escherichia coli exposed to visible light in seawater: analysis of rpoS-dependent effects

Canadian Journal of Microbiology
M GourmelonM Cormier

Abstract

We investigated the effect of visible light on Escherichia coli in seawater microcosms. Escherichia coli lost its ability to form colonies in marine environments when exposed to artificial continuous visible light. Survival of illuminated bacteria during the stationary phase was drastically reduced in the absence of the sigma factor (RpoS or KatF) that regulates numerous genes induced in this phase. In the stationary phase, double catalase mutants katE katG and mutants defective in the protein Dps (both catalase and Dps are involved in resistance to hydrogen peroxide (H2O2)), were more sensitive to light. In the exponenital phase, a mutation in oxyR, the regulatory gene of the adaptive response to H2O2, increased sensitivity to light, further suggesting that deleterious effects might be associated with H2O2 production. However, in the stationary phase, the katE katG dps mutant was considerably more resistant to visible light than the rpoS mutant, suggesting rpoS-dependent protection against deleterious effects other than those related to H2O2. The deleterious action of visible light was less important when the salinity decreased. In freshwater, rpoS and katE katG dps mutants did not show a drastic difference in sensitivity to l...Continue Reading

References

Dec 1, 1979·Applied and Environmental Microbiology·I C AndersonH Kator
Jan 1, 1992·Journal of Bacteriology·D A Siegele, R Kolter
Mar 1, 1991·The Journal of Applied Bacteriology·C M Davies, L M Evison
Jun 5, 1991·Journal of Molecular Biology·K MiyamotoH Inokuchi
May 1, 1990·Journal of Bacteriology·D E JenkinsA Matin
May 1, 1989·Proceedings of the National Academy of Sciences of the United States of America·B D SakD Touati
Jan 1, 1989·Journal of Bacteriology·J U JungM R Villarejo
Mar 1, 1989·Canadian Journal of Microbiology·M J GauthierV A Breittmayer
Aug 1, 1989·Applied and Environmental Microbiology·P M MunroJ Bongiovanni
Jan 1, 1989·Journal of General Microbiology·C D LanghamA M Mortimer
Dec 1, 1987·Applied and Environmental Microbiology·D B Roszak, R R Colwell
Mar 1, 1995·Letters in Applied Microbiology·E DuprayR Pichon
Jan 1, 1994·Annual Review of Microbiology·P C Loewen, R Hengge-Aronis
Jul 1, 1994·The Journal of Applied Bacteriology·M GourmelonM Pommepuy
Jun 1, 1994·Applied and Environmental Microbiology·L W SintonR G Bell
Apr 1, 1996·Applied and Environmental Microbiology·K E WommackR R Colwell
Jan 1, 1996·Free Radical Biology & Medicine·A EisenstarkA Ivanova
Jun 1, 1994·Applied and Environmental Microbiology·R J Davies-ColleyA M Donnison

❮ Previous
Next ❯

Citations

Dec 3, 2004·Applied and Environmental Microbiology·Alexander K T KirschnerAndreas H Farnleitner
Apr 7, 2006·Applied and Environmental Microbiology·Michael BerneyThomas Egli
Dec 18, 2001·FEMS Microbiology Reviews·Y Rozen, S Belkin
Jun 16, 2016·Marine Pollution Bulletin·Vanessa F V RodriguesSunny C Jiang
Oct 2, 2008·Journal of Proteome Research·Anthony ColletThierry Jouenne

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.