Quantitative Analysis of the Inactivation of Photosynthetic Oxygen Evolution and the Release of Polypeptides and Manganese in the Photosystem II Particles of Spinach Chloroplasts

1983 ◽  
Vol 24 (4) ◽  
pp. 741-747 ◽  
Author(s):  
Tomohiko Kuwabara ◽  
Norio Murata
Keyword(s):  
Quantitative Analysis ◽  
Photosystem Ii ◽  
Oxygen Evolution ◽  
Photosynthetic Oxygen Evolution ◽  
Spinach Chloroplasts ◽  
Photosynthetic Oxygen ◽  
Photosystem Ii Particles

Interaction of polyamines with proteins of photosystem II: Cation binding and photosynthetic oxygen evolution

2007 ◽  
Vol 833 (1-3) ◽  
pp. 169-174 ◽  
Author(s):  
R. Beauchemin ◽  
J. Harnois ◽  
R. Rouillon ◽  
H.A. Tajmir-Riahi ◽  
R. Carpentier
Keyword(s):  
Photosystem Ii ◽  
Oxygen Evolution ◽  
Cation Binding ◽  
Photosynthetic Oxygen Evolution ◽  
Photosynthetic Oxygen

Cyclic Electron Flow Around Photosystem II as Examined by Photosynthetic Oxygen Evolution Induced by Short Light Flashes

1997 ◽  
Vol 52 (3-4) ◽  
pp. 175-179 ◽  
Author(s):  
W. I. Gruszecki ◽  
K. Strzałka ◽  
A. Radunz ◽  
G. H. Schmid
Keyword(s):  
Photosystem Ii ◽  
Oxygen Evolution ◽  
Molecular Mechanisms ◽  
Electron Flow ◽  
Red Light ◽  
Cyclic Electron Flow ◽  
Photosynthetic Oxygen Evolution ◽  
Absorption Region ◽  
Photosynthetic Oxygen ◽  
Light Flashes

Abstract Photosynthetic oxygen evolution from photosystem II particles was analyzed as consequence of a train of short (5 μs) flashes of different light quality and different intensities to study cyclic electron flow around photosystem II. Damped oscillations of the amplitudes of O2-evolution corresponding to a flash sequence were fitted numerically and analyzed in terms of a nonhomogeneous distribution of misses, represented by the probability parameter αi. Application of red light, known to promote cyclic electron flow around photosystem II (Gruszecki et al., 1995) results in a considerable increase of all αi, indicating that at the molecular level the misses may be interpreted as resulting from a competition for the reduction of oxidized P680 between cyclic electron flow and the electron flow coming from the water splitting enzyme. In accordance with previous findings, application of light flashes of the spectrum covering the absorption region of carotenoids resulted in an inhibition of cyclic electron flow and a pronounced decrease of the level of the miss parameter. Possible molecular mechanisms for the activity control of this cyclic electron transport around photosystem II by carotenoids are discussed.

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