Lateral Electron Transport in Thylakoids of Higher Plants

1987 ◽  
pp. 513-520 ◽  
Author(s):  
Wolfgang Haehnel ◽  
Rowan Mitchell ◽  
Andreas Spillman
Keyword(s):  
Electron Transport ◽  
Higher Plants

scholarly journals Plastocyanin is the long-range electron carrier between photosystem II and photosystem I in plants

2020 ◽  
Vol 117 (26) ◽  
pp. 15354-15362 ◽  
Author(s):  
Ricarda Höhner ◽  
Mathias Pribil ◽  
Miroslava Herbstová ◽  
Laura Susanna Lopez ◽  
Hans-Henning Kunz ◽  
...  
Keyword(s):  
Electron Transport ◽  
Photosystem Ii ◽  
Long Range ◽  
Narrow Range ◽  
Higher Plants ◽  
Regulatory Element ◽  
Photosynthetic Electron Transport ◽  
Electron Carrier ◽  
Mobile Electron ◽  
Electron Carriers

In photosynthetic electron transport, large multiprotein complexes are connected by small diffusible electron carriers, the mobility of which is challenged by macromolecular crowding. For thylakoid membranes of higher plants, a long-standing question has been which of the two mobile electron carriers, plastoquinone or plastocyanin, mediates electron transport from stacked grana thylakoids where photosystem II (PSII) is localized to distant unstacked regions of the thylakoids that harbor PSI. Here, we confirm that plastocyanin is the long-range electron carrier by employing mutants with different grana diameters. Furthermore, our results explain why higher plants have a narrow range of grana diameters since a larger diffusion distance for plastocyanin would jeopardize the efficiency of electron transport. In the light of recent findings that the lumen of thylakoids, which forms the diffusion space of plastocyanin, undergoes dynamic swelling/shrinkage, this study demonstrates that plastocyanin diffusion is a crucial regulatory element of plant photosynthetic electron transport.

Mechanism of action of anions on the electron transport chain in thylakoid membranes of higher plants

2011 ◽  
Vol 43 (2) ◽  
pp. 195-202 ◽  
Author(s):  
Pooja Singh-Rawal ◽  
Ottó Zsiros ◽  
Sudhakar Bharti ◽  
Győző Garab ◽  
Anjana Jajoo
Keyword(s):  
Electron Transport ◽  
Mechanism Of Action ◽  
Electron Transport Chain ◽  
Higher Plants ◽  
Thylakoid Membranes ◽  
Transport Chain

Regulation of photosystem II by metabolic and environmental factors

1989 ◽  
Vol 323 (1216) ◽  
pp. 269-279 ◽  
Keyword(s):  
Electron Transport ◽  
Higher Plants ◽  
Photosynthetic Electron Transport ◽  
Thylakoid Membranes ◽  
Internal Factors ◽  
Regulatory Processes ◽  
Quenching Analysis ◽  
Intact Chloroplasts ◽  
Rate Of Dissipation

The thylakoid membranes of higher plants possess several mechanisms that control both the distribution and rate of dissipation of absorbed light. These mechanisms, which allow regulation of photosynthetic electron transport in response to alteration in external and internal factors, can be observed as the various processes that quench chlorophyll fluorescence. By using the 'light-doubling techniques’, together with analysis of quenching relaxation, it is possible to assess quantitatively the extents of these regulatory processes and to allow their interrelations to be studied. These techniques can be applied to in vitro systems or to leaves, and can be particularly useful when applied with electron-transport measurements and when models are used to aid interpretation. Results of quenching analysis at different light intensities in isolated thylakoids, intact chloroplasts, protoplasts, algae and leaves of a variety of species are presented.

scholarly journals Photosynthetic Electron Transport Determines Nitrate Reductase Gene Expression and Activity in Higher Plants

2002 ◽  
Vol 277 (48) ◽  
pp. 46594-46600 ◽  
Author(s):  
Irena Sherameti ◽  
Sudhir K. Sopory ◽  
Artan Trebicka ◽  
Thomas Pfannschmidt ◽  
Ralf Oelmüller
Keyword(s):  
Gene Expression ◽  
Electron Transport ◽  
Nitrate Reductase ◽  
Higher Plants ◽  
Photosynthetic Electron Transport ◽  
Nitrate Reductase Gene ◽  
Reductase Gene ◽  
Expression And Activity
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