A pronounced light-induced zeaxanthin formation accompanied by an unusually slight increase in non-photochemical quenching. A study with barley leaves treated with methyl viologen at moderate light.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F08%3A00005290" target="_blank" >RIV/61989592:15310/08:00005290 - isvavai.cz</a>

Alternative codes found

RIV/61388971:_____/08:00315790 RIV/61389030:_____/08:00315790

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

A pronounced light-induced zeaxanthin formation accompanied by an unusually slight increase in non-photochemical quenching. A study with barley leaves treated with methyl viologen at moderate light.

Original language description

Light-induced deepoxidation of violaxanthin to antheraxanthin and zeaxanthin in plants is associated with the induction of pronounced xanthophyll-dependent non-photochemical quenching (NPQ). So far, a misbalance between a high amount of zeaxanthin in thylakoid membranes and low NPQ has been explained by an absence of lumen acidification (e.g. when NPQ is measured in the dark after high light stress). In this work we state that this misbalance can be observed also under moderate light. We found this phenomenon (deepoxidation state, DEPS, above 55 % and NPQ approx. 0.9) in barley leaves treated with 10 M methyl viologen (MV) under white light (100 ?mol photons m-2 s-1, PAR, growth irradiance). The addition of MV at this moderate light did not accelerateelectron transport in thylakoid membranes and induced just a slight oxidative stress (no lipid peroxidation, almost unchanged maximum yield of photosystem II photochemistry, a decrease in activity of ascorbate peroxidase and an increase i

Czech name

Výrazná produkce zeaxanthinu doprovázená neobvykle nizkým nárůstem nefotochemického zhášení. Studium na listech ječmene pod vlivem methyl viologenu za nízké ozářenosti.

Czech description

Světlem indukovaná deepoxidace violaxantinu na antheraxanthin a zeaxanthin je doprovázená výrazným nefotochemickým zhášením (NPQ) za účasti zeaxanthinu. Nerovnováha mezi mezi vysokou hladinou zeaxathinu v thylakoidních membránách a nízkým NPQ byla vysvětlována absencí acidifikace lumenu. V této studii ukazujeme, že tato nerovnováha je pozorovatelná u rostlin za nízkého světla za přítomnosti 10 mikromolárního methyl viologenu.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BO - Biophysics

OECD FORD branch

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Project

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

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2008

Confidentiality

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

Name of the periodical

Journal of Plant Physiology

ISSN

0176-1617

e-ISSN

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Volume of the periodical

165

Issue of the periodical within the volume

15

Country of publishing house

DE - GERMANY

Number of pages

9

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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