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 433775
Title LHCII is an antenna of both photosystems after long-term acclimation
Author(s) Wientjes, E.; Amerongen, H. van; Croce, R.
Source Biochimica et Biophysica Acta. B, Bioenergetics 1827 (2013)3. - ISSN 0005-2728 - p. 420 - 426.
DOI http://dx.doi.org/10.1016/j.bbabio.2012.12.009
Department(s) Biophysics
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) light-harvesting complex - excitation-energy transfer - protein-phosphorylation - state transitions - arabidopsis-thaliana - thylakoid membrane - supramolecular organization - photosynthetic apparatus - dependent regulation - higher-plants
Abstract LHCII, the most abundant membrane protein on earth, is the major light-harvesting complex of plants. It is generally accepted that LHCII is associated with Photosystem II and only as a short-term response to overexcitation of PSII a subset moves to Photosystem I, triggered by its phosphorylation (state1 to state2 transition). However, here we show that in most natural light conditions LHCII serves as an antenna of both Photosystem I and Photosystem II and it is quantitatively demonstrated that this is required to achieve excitation balance between the two photosystems. This allows for acclimation to different light intensities simply by regulating the expression of LHCII genes only. It is demonstrated that indeed the amount of LHCII that is bound to both photosystems decreases when growth light intensity increases and vice versa. Finally, time-resolved fluorescence measurements on the photosynthetic thylakoid membranes show that LHCII is even a more efficient light harvester when associated with Photosystem I than with Photosystem II.
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