Revisiting the QA model of chlorophyll-a fluorescence induction: new perspectives to monitor the photochemical activity and structural dynamics of photosystem II
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F25%3AA2603D1C" target="_blank" >RIV/61988987:17310/25:A2603D1C - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/10.1007/s11120-025-01178-x" target="_blank" >https://link.springer.com/10.1007/s11120-025-01178-x</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11120-025-01178-x" target="_blank" >10.1007/s11120-025-01178-x</a>
Alternative languages
Result language
angličtina
Original language name
Revisiting the QA model of chlorophyll-a fluorescence induction: new perspectives to monitor the photochemical activity and structural dynamics of photosystem II
Original language description
The technique of chlorophyll-a fluorescence induction (ChlF) is widely used in plant biology. The 'mainstream', so-called Q(A) model of ChlF, posits that the reaction centers (RCs) of Photosystem-II (PSII) exist in two states, quenched (F-o) or open (PSIIO), and unquenched (F-m) or closed (PSIIC), containing the primary quinone acceptor, Q(A), in oxidized and reduced state, respectively; and that the quantum yield of PSII photochemistry of a dark-adapted sample is Y(II) = F-v/F-m, where F-v=F-m-F-o. The widespread application of ChlF, with user-friendly instruments, and the use of the Q(A) model, have substantially contributed to our understanding of the operation of the photosynthetic machineries under different environmental conditions. However, recent experimental data - multiple light-induced fluorescence increments in PSIIC; the complex, pH and temperature dependent kinetic and spectral features of key ChlF parameters; twith enhanced stabilization of the charges - cannot be reconciled with the Q(A) model. These features are explained by subtle conformational transitions driven by stationary and transient electric fields and associated dielectric relaxation processes. This interpretation, while invites further studies, places the hitherto unknown structural and functional plasticity of the RC matrix in the context of its physiological significance.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10610 - Biophysics
Result continuities
Project
<a href="/en/project/GA23-07744S" target="_blank" >GA23-07744S: Identification and characterization of structural entities associated with different lipid phases of plant thylakoid membranes</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Photosynthesis Research
ISSN
0166-8595
e-ISSN
1573-5079
Volume of the periodical
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Issue of the periodical within the volume
6
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
14
Pages from-to
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UT code for WoS article
001600283900001
EID of the result in the Scopus database
2-s2.0-105019487698