Plants cope with fluctuating light by frequency-dependent nonphotochemical quenching and cyclic electron transport.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F23%3A73619447" target="_blank" >RIV/61989592:15310/23:73619447 - isvavai.cz</a>
Result on the web
<a href="https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19083" target="_blank" >https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19083</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1111/nph.19083" target="_blank" >10.1111/nph.19083</a>
Alternative languages
Result language
angličtina
Original language name
Plants cope with fluctuating light by frequency-dependent nonphotochemical quenching and cyclic electron transport.
Original language description
In natural environments, plants are exposed to rapidly changing light. Maintaining photosynthetic efficiency while avoiding photodamage requires equally rapid regulation of photoprotective mechanisms. We asked what the operation frequency range of regulation is in which plants can efficiently respond to varying light. Chlorophyll fluorescence, P700, plastocyanin, and ferredoxin responses of wild-types Arabidopsis thaliana were measured in oscillating light of various frequencies. We also investigated the npq1 mutant lacking violaxanthin de-epoxidase, the npq4 mutant lacking PsbS protein, and the mutants crr2-2, and pgrl1ab impaired in different pathways of the cyclic electron transport. The fastest was the PsbS-regulation responding to oscillation periods longer than 10 s. Processes involving violaxanthin de-epoxidase dampened changes in chlorophyll fluorescence in oscillation periods of 2 min or longer. Knocking out the PGR5/PGRL1 pathway strongly reduced variations of all monitored parameters, probably due to congestion in the electron transport. Incapacitating the NDH-like pathway only slightly changed the photosynthetic dynamics. Our observations are consistent with the hypothesis that nonphotochemical quenching in slow light oscillations involves violaxanthin de-epoxidase to produce, presumably, a largely stationary level of zeaxanthin. We interpret the observed dynamics of photosystem I components as being formed in slow light oscillations partially by thylakoid remodeling that modulates the redox rates.
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/EF16_019%2F0000827" target="_blank" >EF16_019/0000827: Plants as a tool for sustainable global development</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
NEW PHYTOLOGIST
ISSN
0028-646X
e-ISSN
1469-8137
Volume of the periodical
239
Issue of the periodical within the volume
5
Country of publishing house
GB - UNITED KINGDOM
Number of pages
18
Pages from-to
1869-1886
UT code for WoS article
001026228500001
EID of the result in the Scopus database
2-s2.0-85164597814