Systems approach to excitation-energy and electron transfer reaction networks in photosystem II complex: model studies for chlorophyll a fluorescence induction kinetics

2015 ◽  
Vol 380 ◽  
pp. 220-237 ◽  
Author(s):  
Takeshi Matsuoka ◽  
Shigenori Tanaka ◽  
Kuniyoshi Ebina
Keyword(s):  
Transfer Reaction ◽  
Systems Approach ◽  
Electron Transfer Reaction ◽  
Complex Model ◽  
Fluorescence Induction ◽  
Reaction Networks ◽  
Model Studies ◽  
Induction Kinetics ◽  
Fluorescence Induction Kinetics ◽  
Energy And Electron Transfer

Photosynthetic Characteristics of Three Strains of Cyanobacteria Grown under Low-or High-C02 Conditions

1996 ◽  
Vol 51 (1-2) ◽  
pp. 40-46 ◽  
Author(s):  
Shigetoh Miyachi ◽  
Joachim Bürger ◽  
Kiriakos Kotzabasis ◽  
Jens Thielmann ◽  
Horst Senger
Keyword(s):  
Oxygen Evolution ◽  
Dissolved Inorganic Carbon ◽  
Electron Flow ◽  
Liquid Nitrogen Temperature ◽  
Fluorescence Induction ◽  
Anabaena Variabilis ◽  
Photosynthetic Oxygen Evolution ◽  
Induction Kinetics ◽  
Fluorescence Induction Kinetics ◽  
Photosynthetic Oxygen

Abstract Quantum requirements of photosynthetic oxygen evolution at 679 nm, fluorescence emis­sion spectra at liquid nitrogen temperature (77 K) and fluorescence induction kinetics in the presence of DCM U, were measured in the cyanobacteria Anabaena variabilis M3, Anabaena variabilis ATCC 29413 and A nacystis nidulans R2, each grown under low-or high-CO2 conditions. Low -CO2 grown cells of the cyanobacteria showed a higher quantum requirement of photosynthetic oxygen evolution and a higher ratio o F710-740 to F680-700 fluorescence and a lower variable fluorescence in the presence of DCMU than high-CO2 grown cells. These findings indicate a change in excitation energy distribution in favour of photosystem I. The result might be an enhancement in ATP formation caused by cyclic electron flow which in turn provokes dissolved inorganic carbon (DIC) accumulation in these low-CO2 grown cells.

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