Faculty Opinions recommendation of PROTON GRADIENT REGULATION 5 contributes to ferredoxin-dependent cyclic phosphorylation in ruptured chloroplasts.

2018 ◽  
Author(s):  
Dario Leister
Keyword(s):  
Proton Gradient

Electrochemical proton gradient and phosphate potential in bacterial chromatophores

FEBS Letters ◽  
1974 ◽  
Vol 49 (2) ◽  
pp. 203-207 ◽  
Author(s):  
Rita Casadio ◽  
Assunta Baccarini Melandri ◽  
Davide Zannoni ◽  
Bruno A. Melandri
Keyword(s):  
Proton Gradient ◽  
Phosphate Potential ◽  
Electrochemical Proton Gradient

Inhibitions of photosystem II activity by proton gradient

1994 ◽  
Vol 1185 (3) ◽  
pp. 279-283 ◽  
Author(s):  
Alexander M. Ehrenheim ◽  
Giovanni Finazzi ◽  
Giorgio Forti
Keyword(s):  
Photosystem Ii ◽  
Proton Gradient ◽  
Photosystem Ii Activity

Inhibition of Photosynthetic Reactions by Aureomycin

1984 ◽  
Vol 39 (6) ◽  
pp. 627-633 ◽  
Author(s):  
Ji-yu Ye ◽  
U. Heber
Keyword(s):  
Membrane Potential ◽  
Proton Gradient ◽  
Effective Inhibitor ◽  
Mesophyll Protoplasts ◽  
Electrochromic Shift ◽  
Low Concentrations ◽  
Intact Chloroplasts ◽  
Photosynthetic Reactions ◽  
Isolated Chloroplasts

The effect of aureomycin on photosynthesis was investigated. This antibiotic which has been reported to stimulate photosynthesis at very low concentrations is an effective inhibitor at higher concentrations. In mesophyll protoplasts and isolated chloroplasts from spinach, 50% inhibition of CO2 reduction required about 20 μᴍ aureomycin. The reduction of 3-phosphoglycerate and of oxaloacetate by intact chloroplasts was also inhibited, but not that of nitrite and methylviologen which was actually stimulated. NADP reduction by broken chloroplasts and methylviologen- dependent photophosphorylation were also sensitive to aureomycin. The electrochromic shift at 518 nm which indicates formation of a light-dependent membrane potential was suppressed in the presence of 200 μᴍ aureomycin and the transthylakoid proton gradient was decreased. The data confirm reports that aureomycin has uncoupling properties, and they indicate that it also acts as an inhibitor of ferredoxin/NADP reductase.

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