Results 241 to 250 of about 21,000 (274)

Activation of non-photochemical quenching in thylakoids and leaves

Planta, 1994
The 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).
Giles N Johnson, Peter Horton, Johnson Giles N   +2 more
exaly   +2 more sources

Non-photochemical fluorescence quenching and the diadinoxanthin cycle in a marine diatom

Photosynthesis Research, 1994
The 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, J, La Roche, Z, Kolber, P G, Falkowski   +3 more
openaire   +3 more sources

Is qE Always the Major Component of Non-photochemical Quenching?

, 2008
Non-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, GUADAGNO C. R., VIRZO DE SANTO A.   +2 more
openaire   +3 more sources

Continuous recording of photochemical and non-photochemical chlorophyll fluorescence quenching with a new type of modulation fluorometer

Photosynthesis Research, 1986
A newly developed fluorescence measuring system is employed for the recording of chlorophyll fluorescence induction kinetics (Kautsky-effect) and for the continuous determination of the photochemical and non-photochemical components of fluorescence quenching. The measuring system, which is based on a pulse modulation principle, selectively monitors the
Ulrich Schreiber, Wolfgang Bilger, Schreiber U   +2 more
exaly   +3 more sources

The relationship between non-photochemical quenching of chlorophyll fluorescence and the rate of photosystem 2 photochemistry in leaves

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.
Bernard Genty, Jeremy Harbinson, Jean-Marie Briantais   +2 more
exaly   +2 more sources

Improving photosynthetic efficiency by modulating non-photochemical quenching

Trends in Plant Science, 2023
High 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, Sumanta Mohapatra, Vivek Dogra   +2 more
openaire   +2 more sources

The role of photochemical quenching and antioxidants in photoprotection of Deschampsia antarctica

Functional Plant Biology, 2004
Deschampsia 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, Andrea, García, Jorge, Dinamarca, Miren, Alberdi, Ana, Gutiérrez, Manuel, Gidekel, Alexander G, Ivanov, Norman P A, Hüner, Luis J, Corcuera, LeónA, Bravo   +9 more
openaire   +2 more sources

Excimer and non-photochemical quenching in LHCII

The Journal of Chemical Physics
The 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, Dan-Hong Li, Rong-Yao Gao, Yu-Qian Li, Qi-Rui Yu, Zhi-Hao Yu, Alexander V. Ruban, Jian-Ping Zhang, Junrong Zheng   +8 more
openaire   +2 more sources

Induction of photochemical and non-photochemical quenching of chlorophyll fluorescence by low concentrations of m-dinitrobenzene

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
openaire   +2 more sources

A METHOD OF TREATING PHOTOCHEMICAL TRIPLET QUENCHING DATA

Photochemistry and Photobiology, 1969
Abstract— 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 ...
openaire   +2 more sources