Reaction of photosynthetic apparatus to dark desiccation sensitively detected by the induction of chlorophyll fluorescence quenching

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F99%3A00000840" target="_blank" >RIV/61989592:15310/99:00000840 - 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

Reaction of photosynthetic apparatus to dark desiccation sensitively detected by the induction of chlorophyll fluorescence quenching

Popis výsledku v původním jazyce

Chlorophyll fluorescence parameters F0, FM, FV/FM, FV/F0, the emission and excitation spectra and induction of fluorescence quenching coefficients qP and qN were followed during the desiccation of leaf segments of spring barley (Hordeum vulgare L. cv. Akcent) and detached leaves of an endohydric moss (Rhizomnium punctatum Hedw.) exposed to the same dark-desiccation conditions (35 % air relative humidity, 24 °C). A sensitive fluorescence parameter in the initial phases of tissue desiccation was looked for. A decrease of relative water content (RWC) was much faster in the moss leaves (to 30 % RWC in 10 min) than in barley leaves (to about 30 % RWC in 17 h). A rather insensitive parameter FV/FM started to decrease at 60 % RWC for the moss and at 30 % RWCfor the barley. A more pronounced decrease in comparison with FV/FM was observed in the case of the FV/F0. The ratio of bands (F685/F735) in the emission spectra at two excitation wavelengths (436 and 475 nm) was significantly changing on

Název v anglickém jazyce

Reaction of photosynthetic apparatus to dark desiccation sensitively detected by the induction of chlorophyll fluorescence quenching

Popis výsledku anglicky

Chlorophyll fluorescence parameters F0, FM, FV/FM, FV/F0, the emission and excitation spectra and induction of fluorescence quenching coefficients qP and qN were followed during the desiccation of leaf segments of spring barley (Hordeum vulgare L. cv. Akcent) and detached leaves of an endohydric moss (Rhizomnium punctatum Hedw.) exposed to the same dark-desiccation conditions (35 % air relative humidity, 24 °C). A sensitive fluorescence parameter in the initial phases of tissue desiccation was looked for. A decrease of relative water content (RWC) was much faster in the moss leaves (to 30 % RWC in 10 min) than in barley leaves (to about 30 % RWC in 17 h). A rather insensitive parameter FV/FM started to decrease at 60 % RWC for the moss and at 30 % RWCfor the barley. A more pronounced decrease in comparison with FV/FM was observed in the case of the FV/F0. The ratio of bands (F685/F735) in the emission spectra at two excitation wavelengths (436 and 475 nm) was significantly changing on

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

1999

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

155

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

XX - osoby bez státní příslušnosti

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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