Light-Mediated Nitrite Accumulation during Denitrification by Pseudomonas sp. Strain JR12
AUTOR(ES)
Barak, Yoram
FONTE
American Society for Microbiology
RESUMO
The effect of light on the denitrifying characteristics of a nonphotosynthetic denitrifier, Pseudomonas sp. strain JR12, was examined. Already at low light intensities, nitrite accumulated as a result of light inhibition of nitrite but not of nitrate reduction rates. Exposure of this bacterium to light caused a photooxidation of cytochrome c, an intermediate electron carrier in its respiratory pathway. Photoinhibition of nitrite reduction was reversible, as nitrite reduction rates returned to preillumination levels when light-exposed cells were returned to dark conditions. Antimycin A reversed the inhibitory effect of light on nitrite reduction by preventing a reversed electron flow. Aerobic respiration by this bacterium was not affected by light.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=106331Documentos Relacionados
- Light-mediated retinoic acid production.
- Relationship between Nitrite Reduction and Active Phosphate Uptake in the Phosphate-Accumulating Denitrifier Pseudomonas sp. Strain JR 12
- Light-mediated regulation of phospholipid synthesis in Rhodopseudomonas sphaeroides.
- Light-mediated Oxygen Uptake Measured in Wheat Etioplasts 1
- Monooxygenase-Mediated 1,2-Dichloroethane Degradation by Pseudomonas sp. Strain DCA1
