Vzrůst vysokoteplotně indukované fluorescence chlorofylu v rostlinách při 40-50 stupních C: experimentální a teoretické postupy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F04%3A00002145" target="_blank" >RIV/61989592:15310/04:00002145 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

High-temperature induced chlorophyll fluorescence rise in plants at 40-50 degrees C: experimental and theoretical approach

Popis výsledku v původním jazyce

We studied the temperature dependence of chlorophyll fluorescence intensity in barley leaves under weak and actinic light excitation during linear heating from room temperature to 50degreesC. The heat-induced fluorescence rise usually appearing at around40-50degreesC under weak light excitation was also found in leaves treated with 3-(3',4'-dichlorophenyl)-1,1-dimethylurea (DCMU) or hydroxylamine (NH2OH). However, simultaneous treatment with both these compounds caused a disappearance of the fluorescence rise. We have suggested that the mechanism of the heat-induced fluorescence rise in DCMU-treated leaves is different than that in untreated or NH2OH-treated leaves. In DCMU-treated leaves, the heat-induced fluorescence rise reflects an accumulation ofQ(A)(-) even under weak light excitation due to the thermal inhibition of the S(2)Q(A)(-) recombination as was further documented by a decrease in the intensity of the thermoluminescence Q band. Mathematical model simulating this experim

Název v anglickém jazyce

High-temperature induced chlorophyll fluorescence rise in plants at 40-50 degrees C: experimental and theoretical approach

Popis výsledku anglicky

We studied the temperature dependence of chlorophyll fluorescence intensity in barley leaves under weak and actinic light excitation during linear heating from room temperature to 50degreesC. The heat-induced fluorescence rise usually appearing at around40-50degreesC under weak light excitation was also found in leaves treated with 3-(3',4'-dichlorophenyl)-1,1-dimethylurea (DCMU) or hydroxylamine (NH2OH). However, simultaneous treatment with both these compounds caused a disappearance of the fluorescence rise. We have suggested that the mechanism of the heat-induced fluorescence rise in DCMU-treated leaves is different than that in untreated or NH2OH-treated leaves. In DCMU-treated leaves, the heat-induced fluorescence rise reflects an accumulation ofQ(A)(-) even under weak light excitation due to the thermal inhibition of the S(2)Q(A)(-) recombination as was further documented by a decrease in the intensity of the thermoluminescence Q band. Mathematical model simulating this experim

Druh

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

CEP obor

BO - Biofyzika

OECD FORD obor

—

Projekt

<a href="/cs/project/GP204%2F02%2FP071" target="_blank" >GP204/02/P071: Změny statistických distribucí parametrů chlorofylové fluorescence způsobené stresem fotosyntetického aparátu rostlin měřené pomocí fluorescenčního imagingu</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

Kód důvěrnosti údajů

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

Název periodika

Photosynthesis Research

ISSN

0166-8595

e-ISSN

—

Svazek periodika

81

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

18

Strana od-do

49-66

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—