Femtosecond Transient Absorption Spectroscopy on the Light-Adaptation of Living Plants
1 Max-Planck-Institute for Chemical Energy Conversion, Stiftstr. 34, D-45470 Mülheim, Germany
2 University of Düsseldorf, Institute of Plant Biochemistry, Universitätsstr. 1, D-40225 Düsseldorf, Germany
The photoprotection reaction of the photosynthetic system under excessive sun light has been resolved for the first time by femtosecond absorption spectroscopy from the visible to near-infrared in intact leaves of Arabidopsis thaliana. The light-adaptation process was measured and a prominent non-photochemical quenching (npq) behavior located in photosystem II was observed. Among the various npq quenching mechanisms which have been discussed so far the most likely is the formation of chlorophyll-chlorophyll charge-transfer states which create a powerful energy dissipation pathway for the quenching.
© Owned by the authors, published by EDP Sciences, 2013
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