Effect of Pyrophosphate on Photosynthetic Electron Transport Reactions
AUTOR(ES)
Forti, Giorgio
RESUMO
Inorganic pyrophosphate is found to inhibit the ferredoxin-dependent photoreduction of NADP by isolated chloroplasts. The reduction of ferricyanide is not inhibited, nor is the activity of photosystem 1 as measured with methyl viologen as the electron acceptor. All other ferredoxin-depended reactions are inhibited, such as cytochrome c photoreduction and the reaction sequence: NADPH →Flavoprotein→ferredoxin→cytochrome c. The inhibition by pyrophosphate is, in all cases, competitive with ferredoxin and independent of NADP concentration. Pyrophosphate inhibition of the formation of the ferredoxin-flavoprotein complex is demonstrated spectrophotometrically.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=396297Documentos Relacionados
- Effects of Cu deficiency on photosynthetic electron transport
- Effect of Light Quality on the Organization of Photosynthetic Electron Transport Chain of Pea Seedlings
- High-Temperature Sensitivity and Its Acclimation for Photosynthetic Electron Transport Reactions of Desert Succulents 1
- Effects of Disalicylidenepropanediamines on Photosynthetic Electron Transport of Isolated Spinach Chloroplasts
- hcf5, a nuclear photosynthetic electron transport mutant of Arabidopsis thaliana with a pleiotropic effect on chloroplast gene expression.
