Oxygen evolution and chlorophyll fluorescence from multiple turnover light pulses: charge recombination in photosystem II in sunflower leaves

2012 ◽  
Vol 113 (1-3) ◽  
pp. 145-155 ◽  
Author(s):  
Agu Laisk ◽  
Vello Oja ◽  
Hillar Eichelmann
Keyword(s):  
Chlorophyll Fluorescence ◽  
Photosystem Ii ◽  
Oxygen Evolution ◽  
Charge Recombination ◽  
Light Pulses

scholarly journals OJIP chlorophyll fluorescence induction profiles and plastoquinone binding affinity of the Photosystem II assembly intermediate PSII-I from Thermosynechococcus elongatus

2021 ◽  
Author(s):  
Jure Zabret ◽  
Marc M Nowaczyk
Keyword(s):  
Chlorophyll Fluorescence ◽  
Photosystem Ii ◽  
Binding Affinity ◽  
Conformational Changes ◽  
Charge Recombination ◽  
Fluorescence Induction ◽  
Chlorophyll Fluorescence Induction ◽  
Acceptor Side ◽  
Assembly Intermediate

Binding of Psb28 to the photosystem II assembly intermediate PSII-I induces conformational changes to the PSII acceptor side that impact charge recombination and reduce the in situ production of singlet oxygen (Zabret et al. 2021, Nat. Plants 7, 524-538). A detailed fluorometric analysis of the PSII-I assembly intermediate compared with OEC-disrupted and Mn-depleted PSII complexes showed differences between their variable (OJIP) chlorophyll fluorescence induction profiles. These revealed a distinct destabilisation of the QA- state in the PSII-I assembly intermediate and inactivated PSII samples related to an increased rate of direct and safe charge recombination. Furthermore, inactivation or removal of the OEC increases the binding affinity for plastoquinone analogues like DCBQ to the different PSII complexes. These results might indicate a mechanism that further contributes to the protection of PSII during biogenesis or repair.

Photoelectron transport ability of chloroplast thylakoid membranes treated with NO donor SNP: Changes in flash oxygen evolution and chlorophyll fluorescence

Nitric Oxide ◽  
2011 ◽  
Vol 24 (2) ◽  
pp. 84-90 ◽  
Author(s):  
Radka Vladkova ◽  
Anelia G. Dobrikova ◽  
Ranjeet Singh ◽  
Amarendra N. Misra ◽  
Emilia Apostolova
Keyword(s):  
Chlorophyll Fluorescence ◽  
Oxygen Evolution ◽  
Thylakoid Membranes ◽  
No Donor

scholarly journals Calcium reconstitutes high rates of oxygen evolution in polypeptide depleted Photosystem II preparations

FEBS Letters ◽  
1984 ◽  
Vol 167 (1) ◽  
pp. 127-130 ◽  
Author(s):  
Demetrios F. Ghanotakis ◽  
Gerald T. Babcock ◽  
Charles F. Yocum
Keyword(s):  
Photosystem Ii ◽  
Oxygen Evolution

The Relationship between the Binding of Dicyclohexylcarbodiimide and Quenching of Chlorophyll Fluorescence in the Light-Harvesting Proteins of Photosystem II†

Biochemistry ◽  
1998 ◽  
Vol 37 (33) ◽  
pp. 11586-11591 ◽  
Author(s):  
Alexander V. Ruban ◽  
Paolo Pesaresi ◽  
Ulrich Wacker ◽  
Klaus-Dieter J. Irrgang ◽  
Roberto Bassi ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Photosystem Ii ◽  
Light Harvesting ◽  
The Relationship
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