Ultrastructural and functional changes in the chloroplasts of detached barley leaves senescing under dark and light conditions.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15410%2F03%3A00001527" target="_blank" >RIV/61989592:15410/03:00001527 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15310/03:00001527

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Ultrastructural and functional changes in the chloroplasts of detached barley leaves senescing under dark and light conditions.

Popis výsledku v původním jazyce

Changes in the chloroplast ultrastructure and photochemical function were studied in detached barley (Hordeum vulgare L. cv. Akcent) leaf segments senescing in darkness or in continuous white light of moderate intensity (90 micromol m-2 s-1) for 5 days.A rate of senescence-induced chlorophyll degradation was similar in the dark- and light-senescing segments. The Chl a/b ratio was almost unchanged in the dark-senescing segments whereas in the light-senescing segments an increase in this ratio was observed indicating a preferential degradation of light-harvesting complexes of photosystem II. A higher level of thylakoid disorganization (especially of granal membranes) and a very high lipid peroxidation were observed in the light-senescing segments. In spite of these findings, both the maximal and actual photochemical quantum yields of the photosystem II were highly maintained in comparison with the dark-senescing segments.

Název v anglickém jazyce

Ultrastructural and functional changes in the chloroplasts of detached barley leaves senescing under dark and light conditions.

Popis výsledku anglicky

Changes in the chloroplast ultrastructure and photochemical function were studied in detached barley (Hordeum vulgare L. cv. Akcent) leaf segments senescing in darkness or in continuous white light of moderate intensity (90 micromol m-2 s-1) for 5 days.A rate of senescence-induced chlorophyll degradation was similar in the dark- and light-senescing segments. The Chl a/b ratio was almost unchanged in the dark-senescing segments whereas in the light-senescing segments an increase in this ratio was observed indicating a preferential degradation of light-harvesting complexes of photosystem II. A higher level of thylakoid disorganization (especially of granal membranes) and a very high lipid peroxidation were observed in the light-senescing segments. In spite of these findings, both the maximal and actual photochemical quantum yields of the photosystem II were highly maintained in comparison with the dark-senescing segments.

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/GP522%2F01%2FP098" target="_blank" >GP522/01/P098: Vliv světla a celistvosti rostliny na funkční a strukturní změny thylakoidních membrán během senescence</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

Kód důvěrnosti údajů

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

Název periodika

Journal of Plant Physiology

ISSN

0176-1617

e-ISSN

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Svazek periodika

160

Číslo periodika v rámci svazku

N

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

8

Strana od-do

1051-1058

Kód UT WoS článku

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EID výsledku v databázi Scopus

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