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 371907
Title Fluorescence Lifetime Imaging of crystals of Photosystem I
Author(s) Oort, B.F. van; Amunts, A.; Nelson, N.; Croce, R.; Amerongen, H. van
Source Photosynthesis Research 91 (2007)2-3. - ISSN 0166-8595 - p. 154 - 154.
Event 14th International Congress of Photosynthesis, Glasgow, 2007-07-22/2007-07-27
Department(s) Biophysics
Publication type Abstract in scientific journal or proceedings
Publication year 2007
Abstract Photosystem I (PSI) is a multisubunit protein-pigment complex. It possesses Light-Harvesting Complexes (LHCs) that transfer absorbed energy to the core where the excitation energy induces charge separation in the reaction centre (RC). PSI is unique in binding red chlorophylls (Chls), with energy levels lower than that of the RC. These Chls may compete with the RC as an energy sink. The function of these red Chls is not fully known. Many time-resolved optical spectroscopy studies on PSI have revealed very heterogeneous excited state kinetics. Although this at least partly results from the intrinsic properties of PSI , including the presence of the red pigments , it might in principle also be caused by some sample heterogeneity. Here we show that the fluorescence kinetics of (highly homogeneous) crystals of PSI from pea are identical to those of PSI in solution. This justifies the structure-based modelling of spectral properties of PSI . Our new data indicate that the energy flow from LHC to the core proceeds mainly via the red Chls
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