Origin of chlorophyll fluorescence in plants at 55 - 75 °C

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15410%2F03%3A00001404" target="_blank" >RIV/61989592:15410/03:00001404 - 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

Origin of chlorophyll fluorescence in plants at 55 - 75 °C

Popis výsledku v původním jazyce

The origin of heat-induced chlorophyll fluorescence rise that appears at about 55 - 60 °C during linear heating of leaves, chloroplasts or thylakoids (especially with a reduced content of grana thylakoids) was studied. This fluorescence rise was earlierattributed to photosystem I emission. Our data show that the fluorescence rise originates from chlorophyll a (Chl a) molecules released from Chl-containing protein complexes denaturing at 55 - 60 °C. This conclusion results mainly from the Chl a fluorescence lifetime measurements with barley leaves of different Chl a content and absorption and emission spectra with barley leaves preheated to selected temperatures. This data, supported by the measurements of liposomes with a different Chl a/lipid ratio,suggests that the released Chl a is dissolved in lipids of thylakoid membranes and that with increasing Chl a content in the lipid phase the released Chl a tends to form low-fluorescing aggregates. This is probably the reason for the supp

Název v anglickém jazyce

Origin of chlorophyll fluorescence in plants at 55 - 75 °C

Popis výsledku anglicky

The origin of heat-induced chlorophyll fluorescence rise that appears at about 55 - 60 °C during linear heating of leaves, chloroplasts or thylakoids (especially with a reduced content of grana thylakoids) was studied. This fluorescence rise was earlierattributed to photosystem I emission. Our data show that the fluorescence rise originates from chlorophyll a (Chl a) molecules released from Chl-containing protein complexes denaturing at 55 - 60 °C. This conclusion results mainly from the Chl a fluorescence lifetime measurements with barley leaves of different Chl a content and absorption and emission spectra with barley leaves preheated to selected temperatures. This data, supported by the measurements of liposomes with a different Chl a/lipid ratio,suggests that the released Chl a is dissolved in lipids of thylakoid membranes and that with increasing Chl a content in the lipid phase the released Chl a tends to form low-fluorescing aggregates. This is probably the reason for the supp

Druh

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

CEP obor

BO - Biofyzika

OECD FORD obor

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Projekt

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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

Photochemistry and Photobiology

ISSN

0031-8655

e-ISSN

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Svazek periodika

77

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

68-76

Kód UT WoS článku

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EID výsledku v databázi Scopus

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