Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 536383
Title Dynamic feedback of the photosystem II reaction centre on photoprotection in plants
Author(s) Farooq, Shazia; Chmeliov, Jevgenij; Wientjes, Emilie; Koehorst, Rob; Bader, Arjen; Valkunas, Leonas; Trinkunas, Gediminas; Amerongen, Herbert van
Source Nature Plants 4 (2018). - ISSN 2055-026X - p. 225 - 231.
DOI http://dx.doi.org/10.1038/s41477-018-0127-8
Department(s) Biophysics
EPS
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2018
Abstract Photosystem II of higher plants is protected against light damage by thermal dissipation of excess excitation energy, a process that can be monitored through non-photochemical quenching of chlorophyll fluorescence. When the light intensity is lowered, non-photochemical quenching largely disappears on a time scale ranging from tens of seconds to many minutes. With the use of picosecond fluorescence spectroscopy, we demonstrate that one of the underlying mechanisms is only functional when the reaction centre of photosystem II is closed, that is when electron transfer is blocked and the risk of photodamage is high. This is accompanied by the appearance of a long-wavelength fluorescence band. As soon as the reaction centre reopens, this quenching, together with the long-wavelength fluorescence, disappears instantaneously. This allows plants to maintain a high level of photosynthetic efficiency even in dangerous high-light conditions.
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