PGR5 and NDH Pathways in Photosynthetic Cyclic Electron Transfer Respond Differently to Sublethal Treatment with Photosystem-Interfering Herbicides

2014 ◽  
Vol 62 (18) ◽  
pp. 4083-4089 ◽  
Author(s):  
Haifeng Qian ◽  
Takuma Tsuji ◽  
Tsuyoshi Endo ◽  
Fumihiko Sato
Keyword(s):  
Electron Transfer ◽  
Cyclic Electron Transfer

Hypothesis: versatile function of ferredoxin-NADP+ reductase in cyanobacteria provides regulation for transient photosystem I-driven cyclic electron flow

2002 ◽  
Vol 29 (3) ◽  
pp. 201 ◽  
Author(s):  
Hans C. P. Matthijs ◽  
Robert Jeanjean ◽  
Nataliya Yeremenko ◽  
Jef Huisman ◽  
Francoise Joset ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Salt Stress ◽  
De Novo ◽  
Electron Flow ◽  
High Co2 ◽  
Partial Restoration ◽  
Synechocystis Pcc6803 ◽  
Low Co2 ◽  
Cyclic Electron Transfer

Pseudo-reversion of the high-CO2 requiring phenotype of the NADH dehydrogenase type 1-impaired mutant of Synechocystis PCC6803, strain M55, by salt stress coincides with partial restoration of PSI-driven cyclic electron transfer. In M55, the complete family of D proteins (D1–D6) that are needed for electron transfer through the complex is lacking. Adaptation to salt stress requires de novo synthesis of full-length 47-kDa ferredoxin-NADP+ reductase (FNR). A mutant created in the M55 background, which only expresses truncated chloroplast 37-kDa FNR cannot adapt to salt stress and refrains from growth in low CO2. A special feature of FNR in cyanobacteria is the relatively high molecular mass of 44–48 kDa. A positively charged extended N-terminal domain of the cyanobacterial enzyme defines the extra mass. The extension likely plays a key role in the salt-stress inducible enhancement of PSI-driven cyclic electron transfer, and in the pseudo-reversion of the high-CO2 requiring phenotype of M55. Data acquired with several other cyanobacteria and the oxychlorobacterium Prochlorothrix hollandica contributed to the present hypothesis. It proposes that FNR is involved in regulation of inducible and transient PSI cyclic electron transfer in cyanobacteria via a thylakoid surface charge and conditional-proteolysis steered mechanism.

Drought stress-induced upregulation of components involved in ferredoxin-dependent cyclic electron transfer

2010 ◽  
Vol 167 (12) ◽  
pp. 1018-1022 ◽  
Author(s):  
Nina Lehtimäki ◽  
Minna Lintala ◽  
Yagut Allahverdiyeva ◽  
Eva-Mari Aro ◽  
Paula Mulo
Keyword(s):  
Electron Transfer ◽  
Drought Stress ◽  
Cyclic Electron Transfer
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