Photosynthetic Quantum Yield Dynamics
| Autor: | Wim van Ieperen, Emilie Wientjes, Peter Douwstra, Jeremy Harbinson, G. Trouwborst, Roberta Croce, Sander W. Hogewoning |
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| Přispěvatelé: | Groningen Biomolecular Sciences and Biotechnology, Electron Microscopy, Biophysics Photosynthesis/Energy, LaserLaB - Energy |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Photosystem II
plastid redox signals Leerstoelgroep Tuinbouwproductieketens Physics::Optics Quantum yield Plant Science PLASTID REDOX SIGNALS Photochemistry LEAF PHOTOSYNTHESIS leaf photosynthesis vascular plants Photosynthesis Research Articles Action spectrum Photosystem STATE TRANSITIONS Physics::Biological Physics Quantitative Biology::Biomolecules light environment food and beverages PE&RC ACTION SPECTRUM beta-carotene LIGHT ENVIRONMENT chlorophyll-protein complexes arabidopsis-thaliana macromolecular substances Biology Photosystem I Botany state transitions SDG 7 - Affordable and Clean Energy Horticultural Supply Chains P700 Photosystem I Protein Complex BETA-CAROTENE Photosystem II Protein Complex Cell Biology action spectrum Carotenoids Plant Leaves SINGLET ENERGY-TRANSFER Artificial sunlight CHLOROPHYLL-PROTEIN COMPLEXES singlet energy-transfer ARABIDOPSIS-THALIANA VASCULAR PLANTS sense organs Cucumis sativus |
| Zdroj: | Hogewoning, S W, Wientjes, I E, Douwstra, P, Trouwborst, G, van Iperen, W, Croce, R & Harbinson, J 2012, ' Photosynthetic Quantum Yield Dynamics: from Photosystems to Leaves ', The Plant Cell . https://doi.org/10.1105/tpc.112.097972 The Plant Cell 24 (2012) 5 The Plant Cell, 24(5), 1921-1935 Plant Cell, 24(5), 1921-1935 The Plant Cell. American Society of Plant Biologists |
| ISSN: | 1040-4651 |
| Popis: | The mechanisms underlying the wavelength dependence of the quantum yield for CO2 fixation (alpha) and its acclimation to the growth-light spectrum are quantitatively addressed, combining in vivo physiological and in vitro molecular methods. Cucumber (Cucumis sativus) was grown under an artificial sunlight spectrum, shade light spectrum, and blue light, and the quantum yield for photosystem I (PSI) and photosystem II (PSII) electron transport and alpha were simultaneously measured in vivo at 20 different wavelengths. The wavelength dependence of the photosystem excitation balance was calculated from both these in vivo data and in vitro from the photosystem composition and spectroscopic properties. Measuring wavelengths overexciting PSI produced a higher alpha for leaves grown under the shade light spectrum (i.e., PSI light), whereas wavelengths overexciting PSII produced a higher alpha for the sun and blue leaves. The shade spectrum produced the lowest PSI: PSII ratio. The photosystem excitation balance calculated from both in vivo and in vitro data was substantially similar and was shown to determine alpha at those wavelengths where absorption by carotenoids and nonphotosynthetic pigments is insignificant (i.e., >580 nm). We show quantitatively that leaves acclimate their photosystem composition to their growth light spectrum and how this changes the wavelength dependence of the photosystem excitation balance and quantum yield for CO2 fixation. This also proves that combining different wavelengths can enhance quantum yields substantially. |
| Databáze: | OpenAIRE |
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