Partitioning of absorbed light energy within photosystem II in barley can be affected by chloroplast movement

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F18%3AA1901V5O" target="_blank" >RIV/61988987:17310/18:A1901V5O - isvavai.cz</a>

Alternative codes found

RIV/86652079:_____/18:00496377

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1011134418302690" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1011134418302690</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jphotobiol.2018.06.019" target="_blank" >10.1016/j.jphotobiol.2018.06.019</a>

Result language

angličtina

Original language name

Partitioning of absorbed light energy within photosystem II in barley can be affected by chloroplast movement

Original language description

Plants have developed many ways to protect reaction centres of photosystems against overexcitation. One of the mechanisms involves reduction of the leaf absorption cross-section by light-induced chloroplast avoidance reaction. Decrease in the probability of photon absorption by the pigments bound within photosystem II (PSII) complexes leads to the increase in quantum yield of PSII photochemistry (?PSII). On the other hand, the decrease of PSII excitation probability causes reduction of chlorophyll a fluorescence intensity which is manifested as the apparent increase of determined quantum yield of regulated light-induced non-photochemical quenching (?NPQ). Absorption of different light intensity by phototropins led to the different chloroplast distribution within barley leaves, estimated by measurement of the leaf transmittance. Due to a weak blue light used for transmittance measurements, leaves exposed to actinic light with wavelengths longer than 520 nm undergo chloroplast accumulation reaction, in contrast with leaves exposed to light with shorter wavelengths, that showed a different extent of chloroplast avoidance reaction. Based on the ?NPQ action spectra measured simultaneously with the transmittance, the influence of different chloroplast distribution on ?NPQ was assessed. The analysis of results showed that decrease in the leaf absorption cross-section due to increasing part of chloroplasts reaching profile position significantly affected the partitioning of excitation energy within PSII and such rearrangement also distorted measured ?NPQ and cannot be neglected in its interpretation. When the majority of chloroplastsreached profile position, the photoprotective effect appeared to be the most prominent for strong blue light that has the highest absorption in the upper leaf layers in comparison with green or red ones.

Czech name

—

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

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OECD FORD branch

10610 - Biophysics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

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

Name of the periodical

J PHOTOCH PHOTOBIO B

ISSN

1011-1344

e-ISSN

—

Volume of the periodical

186

Issue of the periodical within the volume

September 2018

Country of publishing house

CH - SWITZERLAND

Number of pages

9

Pages from-to

98-106

UT code for WoS article

000443665200012

EID of the result in the Scopus database

2-s2.0-85049919311