Low-light-induced Violaxanthin De-epoxidation in Shortly Preheated Leaves: Uncoupling from ?pH-dependent Non-photochemical Quenching

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F10%3A10212196" target="_blank" >RIV/61989592:15310/10:10212196 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Low-light-induced Violaxanthin De-epoxidation in Shortly Preheated Leaves: Uncoupling from ?pH-dependent Non-photochemical Quenching

Popis výsledku v původním jazyce

Plants protect themselves against excessive light by the induction of DpH-dependent non-photochemical quenching (qE) that is associated with de-epoxidation of violaxanthin (V) to zeaxanthin (Z) in thylakoid membranes. In this work, we report that low light (12 ?mol photons m-2 s-1) is sufficient for a marked stimulation of the V to Z conversion in shortly preheated wheat leaves (5 min, 40°C), but without a substantial increase in qE. Re-irradiation of these leaves with high light led to a rapid induction of non-photochemical quenching, implying a potential photoprotective role of low-light-induced Z in preheated leaves. On the contrary to low light conditions, preheated leaves exposed to high light behaved similarly to non-heated leaves with respect tothe V to Z conversion and qE induction. The obtained results indicate that low-light-induced lumen acidification in preheated leaves is high enough to activate V de-epoxidation, but not sufficiently high to induce the formation of quench

Název v anglickém jazyce

Low-light-induced Violaxanthin De-epoxidation in Shortly Preheated Leaves: Uncoupling from ?pH-dependent Non-photochemical Quenching

Popis výsledku anglicky

Plants protect themselves against excessive light by the induction of DpH-dependent non-photochemical quenching (qE) that is associated with de-epoxidation of violaxanthin (V) to zeaxanthin (Z) in thylakoid membranes. In this work, we report that low light (12 ?mol photons m-2 s-1) is sufficient for a marked stimulation of the V to Z conversion in shortly preheated wheat leaves (5 min, 40°C), but without a substantial increase in qE. Re-irradiation of these leaves with high light led to a rapid induction of non-photochemical quenching, implying a potential photoprotective role of low-light-induced Z in preheated leaves. On the contrary to low light conditions, preheated leaves exposed to high light behaved similarly to non-heated leaves with respect tothe V to Z conversion and qE induction. The obtained results indicate that low-light-induced lumen acidification in preheated leaves is high enough to activate V de-epoxidation, but not sufficiently high to induce the formation of quench

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BO - Biofyzika

OECD FORD obor

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Projekt

<a href="/cs/project/GA301%2F08%2F1649" target="_blank" >GA301/08/1649: Modulace buněčného dělení normálních a nádorových buněk inhibitory cyklin-dependentních kinas</a><br>

Návaznosti

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

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Photochemistry and Photobiology

ISSN

0031-8655

e-ISSN

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Svazek periodika

86

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

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Kód UT WoS článku

000277301700034

EID výsledku v databázi Scopus

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