Non-photochemical quenching in natural accessions of Arabidopsis thaliana during cold acclimation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F23%3A00574816" target="_blank" >RIV/86652079:_____/23:00574816 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0098847223001673?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0098847223001673?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.envexpbot.2023.105372" target="_blank" >10.1016/j.envexpbot.2023.105372</a>

Result language

angličtina

Original language name

Non-photochemical quenching in natural accessions of Arabidopsis thaliana during cold acclimation

Original language description

Cold acclimation, initiated by non-freezing low temperatures and light, is a natural strategy for increasing plant survival even at sub-zero temperatures. However, it remains unclear how the non-photochemical quenching processes, which are crucial for excessive light energy dissipation, are modulated during cold acclimation. We compared the effects of two weeks of acclimation to sub-optimal temperatures, at 10 degrees C (AC10) and 4 degrees C (AC4), with non-acclimated (NAC) Arabidopsis thaliana natural accessions grown at 21 degrees C, on their growth (rosette area), biochemistry (chlorophylls and epidermal flavonols), and physiology (CO2 assimilation rate, and quantum yields of photochemical and non-photochemical quenching processes). AC10 reduced rosette area in all (six) accessions, while chlorophylls and CO2 assimilation rate (Asat) decreased only in three accessions and it had no effect on maximum quantum yield (Fv/Fm). However, AC4 significantly decreased rosette area, chlorophylls, and Fv/Fm, in all accessions. Both AC10 and AC4 treatments increased the accumulation of epidermal flavonols in all acces-sions. In AC4 accessions, we found an increase in additional non-regulatory NPQ, phi f,d, and a decrease in the fraction of excitation energy used by PSII photochemistry, phi PSII. A similar irradiance resulted in a marginal difference in regulatory NPQ, phi npq, among NAC and AC10 or AC4 plants, however, AC10 plants have more energy-dependent fastest NPQ, phi qE, whereas AC4 predominates state transition quenching, phi qT. These variations in dissipation of absorbed light energy, when combined with reduced chlorophylls and accumulated flavonols, help to reduce the risk of photoinhibition in plants during cold periods. These findings provide new insights into how suboptimal temperature acclimation affects the regulation of NPQ molecular mechanisms in Arabidopsis thaliana natural accessions.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10611 - Plant sciences, botany

Project

<a href="/en/project/EF16_019%2F0000797" target="_blank" >EF16_019/0000797: SustES - Adaptation strategies for sustainable ecosystem services and food security under adverse environmental conditions</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Environmental and Experimental Botany

ISSN

0098-8472

e-ISSN

1873-7307

Volume of the periodical

211

Issue of the periodical within the volume

JUL

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

105372

UT code for WoS article

001005961100001

EID of the result in the Scopus database

2-s2.0-85159107948