Results 231 to 240 of about 209,633 (263)
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Non-Photochemical Quenching of Fluorescence in Cyanobacteria
Biochemistry (Moscow), 2007The pathways of energy dissipation of excessive absorbed energy in cyanobacteria in comparison with that in higher plants are discussed. Two mechanisms of non-photochemical quenching in cyanobacteria are described. In one case this quenching occurs as light-induced decrease of the fluorescence yield of long-wavelength chlorophylls of the photosystem I ...
N V Karapetyan
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Improving photosynthetic efficiency by modulating non-photochemical quenching
Trends in Plant Science, 2023High light exposure rapidly activates non-photochemical quenching (NPQ), protecting plants from photooxidative damage. Contrarily, its relaxation upon transition to normal light occurs quite slowly, limiting photosynthetic efficiency. De Souza et al.
Dipanshu Ghosh +2 more
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Photosynthesis Research, 1990 It has been suggested previously that non-photochemical quenching of chlorophyll fluorescence is associated with a decrease in the rate of photosystem 2 (PS 2) photochemistry.
Jeremy Harbinson +2 more
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Activation of Non-Photochemical Quenching in Thylakoids and Leaves
Planta, 1994The mechanism of rapidly-relaxing non-photochemical quenching in two plant species,Chenopodium album L. andDigitalis purpurea L., that differ considerably in their capacity for such quenching has been investigated (Johnson G.N. et al. 1993, Plant Cell Environ. 16, 673–679).
Andrew Young +2 more
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On the Relationship Between Non-Photochemical Quenching and Photoprotection of Photosystem II
Biochimica Et Biophysica Acta - Bioenergetics, 2012 Non-photochemical quenching (NPQ) of chlorophyll fluorescence is thought to be an indicator of an essential regulation and photoprotection mechanism against high-light stress in photosynthetic organisms. NPQ is typically characterized by modulated pulse fluorometry and it is often assumed implicitly to be a good proxy for the actual physiological ...
Petar Lambrev +2 more
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Excimer and non-photochemical quenching in LHCII
The Journal of Chemical PhysicsThe light-harvesting complex of photosystem II (LHCII) plays the dual roles of photosynthetic energy capture and dissipation, where the excitation energy in excess is dissipated safely via non-photochemical quenching (NPQ) to avoid photodamage. Chlorophyll excimer was recently reported to be an intrinsic photophysical intermediate in LHCII, which may ...
Jian-Wei Zou +8 more
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The role of photochemical quenching and antioxidants in photoprotection of Deschampsia antarctica
Functional Plant Biology, 2004Deschampsia antarctica Desv. (Poaceae) is the only grass that grows in the maritime Antarctic. Constant low temperatures and episodes of high light are typical conditions during the growing season at this latitude. These factors enhance the formation of active oxygen species and may cause photoinhibition.
Eduardo, Pérez-Torres +9 more
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A METHOD OF TREATING PHOTOCHEMICAL TRIPLET QUENCHING DATA
Photochemistry and Photobiology, 1969Abstract— A modified Stern‐Volmer plot method is proposed for treatment of quantum yield data where both reactive photoexcited singlet and triplet states are present in solution. The method may be applied when the reactions occurring are zeroth order in ground state photochemical substrate and allows the separation of singlet and triplet state ...
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Photosynthesis Research, 1988
Chlorophyll fluorescence quenching induced by low concentrations of m-dinitrobenzene (DNB) is investigated. In intact spinach chloroplasts DNB causes photochemical and non-photochemical quenching. The two forms of quenching are distinguished by applying the saturation pulse method with a new type of modulation fluorometer.
C, Neubauer, U, Schreiber
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Chlorophyll fluorescence quenching induced by low concentrations of m-dinitrobenzene (DNB) is investigated. In intact spinach chloroplasts DNB causes photochemical and non-photochemical quenching. The two forms of quenching are distinguished by applying the saturation pulse method with a new type of modulation fluorometer.
C, Neubauer, U, Schreiber
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PsbS-Dependent Non-Photochemical Quenching
2014Much of the research on the thermal dissipation of excess absorbed light, measured as non-photochemical quenching (NPQ) of chlorophyll fluorescence, has been focused on a major, rapidly induced and rapidly reversible component of fluorescence quenching termed energy-dependent quenching, feedback de-excitation, or qE.
Matthew D. Brooks +2 more
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