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Is qE Always the Major Component of Non-photochemical Quenching?
2008Non-photochemical quenching (NPQ) was measured in Col-0 and npq1 mutant plants of Arabidopsis thaliana exposed for 40 min to different light intensities (85, 175, 420, 750 and 1,200 μmol photons m−2 s−1). A light-induced increase of NPQ was measured in Col-0 as well as in npq1 plants but no significant differences were found between two genotypes.
D'AMBROSIO, NICOLA +2 more
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Journal of Plant Physiology, 1994
Summary The thermosensitivity of the photosynthetic apparatus of 12-day-old seedlings of Pisum sativum cv. Ran was investigated within the temperature range of 2–50 °C. Fluorescence quenching was used as a criteria. The photochemical (qP) and non-photochemical (qN) fluorescence quenching were measured after a 5-min treatment at the respective ...
Katia Georgieva, Ivan Yordanov
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Summary The thermosensitivity of the photosynthetic apparatus of 12-day-old seedlings of Pisum sativum cv. Ran was investigated within the temperature range of 2–50 °C. Fluorescence quenching was used as a criteria. The photochemical (qP) and non-photochemical (qN) fluorescence quenching were measured after a 5-min treatment at the respective ...
Katia Georgieva, Ivan Yordanov
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Collisional quenching in the photochemical isomerisation of 1,3,5-cycloheptatriene
Chemical Physics Letters, 1969Abstract The photochemical isomerisation of 1,3,5-cycloheptatriene to toluene occurs via the vibrationally excited ground state molecule. Studies of this isomerisation at seven wavelengths and its quenching by various added gases yield values for the vibrational energy removed per collision.
R. Atkinson, B.A. Thrush
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Non-photochemical quenching of chlorophyll fluorescence in the green alga Dunaliella
Photosynthesis Research, 1990The relaxation of the non-photochemical quenching of chlorophyll fluorescence has been investigated in cells of the green alga Dunaliella following illumination. The relaxation after the addition of DCMU or darkening was strongly biphasic. The uncoupler NH4Cl induced rapid relaxation of both phases, which were therefore both energy-dependent quenching,
C B, Lee, D, Rees, P, Horton
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The structural basis of non-photochemical quenching is revealed?
Trends in Plant Science, 2006Light-harvesting complex II (LHCII, the major plant light-harvesting pigment-protein complex, efficiently harvests light-energy. However, if the incident light intensity is too high and photosynthesis becomes saturated, LHCII can switch into a quenching state that prevents photodamage.
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Non-photochemical fluorescence quenching and the diadinoxanthin cycle in a marine diatom
Photosynthesis Research, 1994The diadinoxanthin cycle (DD-cycle) in chromophyte algae involves the interconversion of two carotenoids, diadinoxanthin (DD) and diatoxanthin (DT). We investigated the kinetics of light-induced DD-cycling in the marine diatom Phaeodactylum tricornutum and its role in dissipating excess excitation energy in PS II. Within 15 min following an increase in
M, Olaizola +3 more
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Biochemical Society Transactions, 2005
NPQ (non-photochemical quenching) is a fundamental photosynthetic mechanism by which plants protect themselves against excess excitation energy and the resulting photodamage. A discussed molecular mechanism of the so-called feedback de-excitation component (qE) of NPQ involves the formation of a quenching complex.
A, Dreuw, G R, Fleming, M, Head-Gordon
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NPQ (non-photochemical quenching) is a fundamental photosynthetic mechanism by which plants protect themselves against excess excitation energy and the resulting photodamage. A discussed molecular mechanism of the so-called feedback de-excitation component (qE) of NPQ involves the formation of a quenching complex.
A, Dreuw, G R, Fleming, M, Head-Gordon
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Physiologia Plantarum, 2011
Partitioning of excitation energy between photochemical quenching (PQ) and non‐photochemical quenching (NPQ) processes is constantly adjusted in the leaf in order to preserve the photosynthetic energy balance. Adjustments in PQ and NPQ often result from a combination of different temporal components that can be simplified into reversible and sustained ...
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Partitioning of excitation energy between photochemical quenching (PQ) and non‐photochemical quenching (NPQ) processes is constantly adjusted in the leaf in order to preserve the photosynthetic energy balance. Adjustments in PQ and NPQ often result from a combination of different temporal components that can be simplified into reversible and sustained ...
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Toward an MP Model of Non-Photochemical Quenching
2009MANCA, Vincenzo +2 more
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On a global scale, the scientific community is to date unable to close the CO2 budget, with implications for policymakers in regard to limiting global warming to internationally agreed levels. Recently, remote sensing of Solar-Induced Chlorophyll Fluorescence (SIF) has emerged as a promising proxy for Gross Primary Productivity (GPP).
Lorenz Hänchen +13 more
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Lorenz Hänchen +13 more
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