Identification of a mechanism of photoprotective energy dissipation in higher plants

Alexander V. Ruban, Rudi Berera, Cristian Ilioaia, Ivo H. M. van Stokkum, John T. M. Kennis, Andrew A. Pascal, Herbert van Amerongen, Bruno Robert (), Peter Horton () and Rienk van Grondelle ()
Additional contact information
Alexander V. Ruban: School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
Rudi Berera: Faculty of Sciences, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
Cristian Ilioaia: Commissariat à l'Energie Atomique (CEA), Institut de Biologie et Technologies de Saclay (iBiTecS) and Centre National de la Recherche Scientifique (CNRS), Gif-sur-Yvette, F-91191, France
Ivo H. M. van Stokkum: Faculty of Sciences, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
John T. M. Kennis: Faculty of Sciences, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
Andrew A. Pascal: Commissariat à l'Energie Atomique (CEA), Institut de Biologie et Technologies de Saclay (iBiTecS) and Centre National de la Recherche Scientifique (CNRS), Gif-sur-Yvette, F-91191, France
Herbert van Amerongen: Laboratory of Biophysics, Wageningen University, PO Box 8128, 6700 ET, Wageningen, The Netherlands
Bruno Robert: Commissariat à l'Energie Atomique (CEA), Institut de Biologie et Technologies de Saclay (iBiTecS) and Centre National de la Recherche Scientifique (CNRS), Gif-sur-Yvette, F-91191, France
Peter Horton: University of Sheffield, Western Bank, Sheffield S10 2TN, UK
Rienk van Grondelle: Faculty of Sciences, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands

Nature, 2007, vol. 450, issue 7169, 575-578

Abstract: Plants feel the heat Plants need sunlight if they are to grow, but must also protect themselves from severe damage, such as bleaching, when the light is too bright. To do this the light-harvesting antennae in the chloroplasts rapidly switch into a photoprotected quenched state in the presence of excess light. Potentially harmful absorbed energy is then lost as heat. The mechanism of this energy dissipation process has been studied using resonance Raman spectroscopy in intact chloroplast membranes and whole leaves. LHCII, the main light-harvesting complex of green plants, is shown to switch between conformational states under different environmental conditions. The properties of the various forms of LHCII dictate energy flow, controlling the balance between gathering light energy for photosynthesis and its dissipation as heat.

Date: 2007
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DOI: 10.1038/nature06262

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