Abstract
We used Arabidopsis thaliana mutants to examine how a photosynthetic regulatory process, the qE-type or DeltapH-dependent nonphotochemical quenching, hereafter named feedback de-excitation, influences plant fitness in different light environments. We show that the feedback de-excitation is important for plant fitness in the field and in fluctuating light in a controlled environment but that it does not affect plant performance under constant light conditions. Our findings demonstrate that the feedback de-excitation confers a strong fitness advantage under field conditions and suggest that this advantage is due to the increase in plant tolerance to variation in light intensity rather than tolerance to high-intensity light itself.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Adaptation, Physiological
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Arabidopsis / genetics
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Arabidopsis / growth & development
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Arabidopsis / physiology*
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Arabidopsis Proteins / genetics
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Arabidopsis Proteins / metabolism
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Electron Transport
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Feedback, Physiological*
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Genotype
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Hydrogen-Ion Concentration
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Light*
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Light-Harvesting Protein Complexes
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Mutation
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Oxidoreductases / genetics
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Oxidoreductases / metabolism*
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Photosynthesis
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Photosynthetic Reaction Center Complex Proteins / genetics
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Photosynthetic Reaction Center Complex Proteins / metabolism*
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Photosystem II Protein Complex*
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Plant Proteins*
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Temperature
Substances
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Arabidopsis Proteins
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Light-Harvesting Protein Complexes
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NPQ4 protein, Arabidopsis
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Photosynthetic Reaction Center Complex Proteins
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Photosystem II Protein Complex
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Plant Proteins
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Oxidoreductases
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violaxanthin de-epoxidase