Journal
XVIIITH INTERNATIONAL CONFERENCE ON ULTRAFAST PHENOMENA
Volume 41, Issue -, Pages -Publisher
E D P SCIENCES
DOI: 10.1051/epjconf/20134108006
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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.
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