Radiační stres a fotoochrana u lišejníku <I>Umbilicaria antarctica</I> monitorované pomocí zobrazovací metody fluorescence chlorofylu a změn v obsahu zeaxantinu a glutationu.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F04%3A00019753" target="_blank" >RIV/00216224:14310/04:00019753 - 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

High-Light Stress and Photoprotection in <I>Umbilicaria antarctica</I> Monitored by Chlorophyll Fluorescence Imaging and Changes in Zeaxanthin and Glutathione

Popis výsledku v původním jazyce

The effect of high light on spatial distribution of chlorophyll (Chl) fluorescence parameters over a lichen thallus (Umbilicaria antarctica) was investigated by imaging of Chl fluorescence parameters before and after exposure to high light (1500 micromolm-2 s-1, 30 min at 5 degC). False colour images of FV/FM and FII distribution, taken over thallus with 0.1 mm2 resolution, showed that maximum FV/FM and FII values were located close to the thallus centre. Minimum values were typical for thallus margins. After exposure to high light, a differential response of FV/FM and FII was found. The marginal thallus part exhibited a loss of photosynthetic activity, manifested as a lack of Chl fluorescence signal, and close-to-centre parts showed a different extent of FV/FM and FII decrease. Subsequent recovery in the dark led to a gradual return of FV/FM and FII to their initial values. Fast (30 min) and slow (1 - 22 h) phase of recovery were distinguished, suggesting a sufficient capacity of pho

Název v anglickém jazyce

High-Light Stress and Photoprotection in <I>Umbilicaria antarctica</I> Monitored by Chlorophyll Fluorescence Imaging and Changes in Zeaxanthin and Glutathione

Popis výsledku anglicky

The effect of high light on spatial distribution of chlorophyll (Chl) fluorescence parameters over a lichen thallus (Umbilicaria antarctica) was investigated by imaging of Chl fluorescence parameters before and after exposure to high light (1500 micromolm-2 s-1, 30 min at 5 degC). False colour images of FV/FM and FII distribution, taken over thallus with 0.1 mm2 resolution, showed that maximum FV/FM and FII values were located close to the thallus centre. Minimum values were typical for thallus margins. After exposure to high light, a differential response of FV/FM and FII was found. The marginal thallus part exhibited a loss of photosynthetic activity, manifested as a lack of Chl fluorescence signal, and close-to-centre parts showed a different extent of FV/FM and FII decrease. Subsequent recovery in the dark led to a gradual return of FV/FM and FII to their initial values. Fast (30 min) and slow (1 - 22 h) phase of recovery were distinguished, suggesting a sufficient capacity of pho

Druh

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

CEP obor

EF - Botanika

OECD FORD obor

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Projekt

<a href="/cs/project/GA522%2F03%2F0754" target="_blank" >GA522/03/0754: Fotoinhibice a fotoochrana u lišejníků v extrémních podmínkách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2004

Kód důvěrnosti údajů

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

Název periodika

Plant Biology

ISSN

1435-8603

e-ISSN

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Svazek periodika

6

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

333-341

Kód UT WoS článku

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EID výsledku v databázi Scopus

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