Spectroscopic Properties of Violaxanthin and Lutein Triplet States in LHCII are Independent of Carotenoid Composition
| Autor: | Milan Durchan, Francesco Saccon, Tomáš Polívka, Ondřej Prášil, Radek Kaňa, Alexander V. Ruban |
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| Rok vydání: | 2019 |
| Předmět: |
Lutein
Arabidopsis Light-Harvesting Protein Complexes Xanthophylls 010402 general chemistry Photosynthesis Photochemistry 01 natural sciences chemistry.chemical_compound 0103 physical sciences Materials Chemistry Physical and Theoretical Chemistry Carotenoid composition chemistry.chemical_classification Reactive oxygen species Binding Sites 010304 chemical physics Arabidopsis Proteins Chemistry Chlorophyll A Spectrum Analysis food and beverages Biological membrane Carotenoids 3. Good health 0104 chemical sciences Surfaces Coatings and Films Chlorophyll Excited state Mutation Violaxanthin |
| Zdroj: | The Journal of Physical Chemistry B |
| ISSN: | 1520-5207 1520-6106 |
| DOI: | 10.1021/acs.jpcb.9b06293 |
| Popis: | Chlorophyll triplet excited states are byproducts of photosynthetic processes that can indirectly harm biological membranes by forming highly reactive oxygen species. A crucial photoprotective mechanism evolved by plants to counter this threat involves the triplet energy transfer from chlorophylls to carotenoid molecules, in which triplet states are not reactive. In the major light-harvesting complex of photosystem II (LHCII), the two central luteins play an important role in the mechanism, but it has been shown that carotenoid triplets are formed even when other carotenoids replace them in their binding sites. In this work, we have investigated carotenoid triplet formation in LHCII isolated from |
| Databáze: | OpenAIRE |
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