Regulation of Photosynthetic Electron Transport and Photoinhibition

ISSN: 1875-5550 (Online)
ISSN: 1389-2037 (Print)

Volume 18, 12 Issues, 2017

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Current Protein & Peptide Science

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Ben M. Dunn
Department of Biochemistry and Molecular Biology University of Florida
College of Medicine, P.O. Box 100245, Gainesville
Florida, FL 32610-0245

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Regulation of Photosynthetic Electron Transport and Photoinhibition

Current Protein & Peptide Science, 15(4): 351-362.

Author(s): Thomas Roach and Anja Krieger-Liszkay.

Affiliation: CEA Saclay, iBiTec-S, Bât. 532, 91191 Gif-sur-Yvette Cedex, France.


Photosynthetic organisms and isolated photosystems are of interest for technical applications. In nature, photosynthetic electron transport has to work efficiently in contrasting environments such as shade and full sunlight at noon. Photosynthetic electron transport is regulated on many levels, starting with the energy transfer processes in antenna and ending with how reducing power is ultimately partitioned. This review starts by explaining how light energy can be dissipated or distributed by the various mechanisms of non-photochemical quenching, including thermal dissipation and state transitions, and how these processes influence photoinhibition of photosystem II (PSII). Furthermore, we will highlight the importance of the various alternative electron transport pathways, including the use of oxygen as the terminal electron acceptor and cyclic flow around photosystem I (PSI), the latter which seem particularly relevant to preventing photoinhibition of photosystem I. The control of excitation pressure in combination with the partitioning of reducing power influences the light-dependent formation of reactive oxygen species in PSII and in PSI, which may be a very important consideration to any artificial photosynthetic system or technical device using photosynthetic organisms.


Electron transport, light stress, non-photochemical quenching, photoinhibition, photosynthesis, reactive oxygen species, regulation.

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Article Details

Volume: 15
Issue Number: 4
First Page: 351
Last Page: 362
Page Count: 12
DOI: 10.2174/1389203715666140327105143

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