PsbX maintains efficient electron transport in Photosystem II and reduces susceptibility to high light in Synechocystis sp. PCC 6803

2021 ◽  
pp. 148519
Author(s):  
Sandeep Biswas ◽  
Julian J. Eaton-Rye
Keyword(s):  
Electron Transport ◽  
Photosystem Ii ◽  
High Light ◽  
Synechocystis Sp ◽  
Pcc 6803

scholarly journals Slr0320 is Crucial for Optimal Function of Photosystem II during High Light Acclimation in Synechocystis sp. PCC 6803

Life ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 279
Author(s):  
Hao Zhang ◽  
Haitao Ge ◽  
Ye Zhang ◽  
Yingchun Wang ◽  
Pengpeng Zhang
Keyword(s):  
Electron Transfer ◽  
Chlorophyll Fluorescence ◽  
Photosystem Ii ◽  
Expression Profiles ◽  
Net Photosynthesis ◽  
High Light ◽  
Psii Activity ◽  
Optimal Function ◽  
Synechocystis Sp ◽  
Pcc 6803

Upon exposure of photosynthetic organisms to high light (HL), several HL acclimation responses are triggered. Herein, we identified a novel gene, slr0320, critical for HL acclimation in Synechocystis sp. PCC 6803. The growth rate of the Δslr0320 mutant was similar to wild type (WT) under normal light (NL) but severely declined under HL. Net photosynthesis of the mutant was lower under HL, but maximum photosystem II (PSII) activity was higher under NL and HL. Immunodetection revealed the accumulation and assembly of PSII were similar between WT and the mutant. Chlorophyll fluorescence traces showed the stable fluorescence of the mutant under light was much higher. Kinetics of single flash‐induced chlorophyll fluorescence increase and decay revealed the slower electron transfer from QA to QB in the mutant. These data indicate that, in the Δslr0320 mutant, the number of functional PSIIs was comparable to WT even under HL but the electron transfer between QA and QB was inefficient. Quantitative proteomics and real‐time PCR revealed that expression profiles of psbL, psbH and psbI were significantly altered in the Δslr0320 mutant. Thus, Slr0320 protein plays critical roles in optimizing PSII activity during HL acclimation and is essential for PSII electron transfer from QA to QB.

scholarly journals Slr0151 in Synechocystis sp. PCC 6803 is required for efficient repair of photosystem II under high-light condition

2014 ◽  
Vol 56 (12) ◽  
pp. 1136-1150 ◽  
Author(s):  
Haomeng Yang ◽  
Libing Liao ◽  
Tingting Bo ◽  
Lei Zhao ◽  
Xuwu Sun ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Light Condition ◽  
High Light ◽  
High Light Condition ◽  
Synechocystis Sp ◽  
Pcc 6803

scholarly journals Cloning of the psbK gene from Synechocystis sp. PCC 6803 and characterization of photosystem II in mutants lacking PSII-K

1991 ◽  
Vol 266 (17) ◽  
pp. 11111-11115
Author(s):  
M. Ikeuchi ◽  
B. Eggers ◽  
G.Z. Shen ◽  
A. Webber ◽  
J.J. Yu ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Synechocystis Sp ◽  
Pcc 6803

State of the phycobilisome determines effective absorption cross-section of Photosystem II in Synechocystis sp. PCC 6803

2021 ◽  
Vol 1862 (12) ◽  
pp. 148494
Author(s):  
Elena A. Protasova ◽  
Taras K. Antal ◽  
Dmitry V. Zlenko ◽  
Irina V. Elanskaya ◽  
Evgeny P. Lukashev ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Absorption Cross ◽  
Effective Absorption ◽  
Synechocystis Sp ◽  
Pcc 6803
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