Nevratné změny v rychlosti fotosyntézy způsobené zahřátím na 40 C.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F05%3A00002158" target="_blank" >RIV/61989592:15310/05:00002158 - 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

Irreversible changes in photosynthetic rate induced by heating above 40 °C.

Popis výsledku v původním jazyce

We studied heat-induced irreversible decrease in the photosynthetic rate (PR) in 8-day-old barley leaves and its possible connection with the effect of heat stress (HS) on the light photosynthetic reactions (LPR). HS was induced by a plunge of dark-adapted leaves in the water bath (24 - 46 °C) for 5 minutes. Such pretreated leaves were cooled down to room temperature and used for gasometric (detection of changes in dark photosynthetic reactions - DPR) and chl a fluorescence measurements (characterization of changes in LPR). At both methods the same intensity of actinic light was used. HS caused a decline of effective quantum yield of photosystem II (PSII) photochemistry (Phi2) and an increase in non-photochemical quenching of Chl a fluorescence (qN) that could be observed already after preheating to 38 °C, while decrease in PR could be first observed only after preheating to 40 °C. Simultaneously we observed rapid decrease in the carboxylation efficiency of Rubisco (dA/dC) after prehea

Název v anglickém jazyce

Irreversible changes in photosynthetic rate induced by heating above 40 °C.

Popis výsledku anglicky

We studied heat-induced irreversible decrease in the photosynthetic rate (PR) in 8-day-old barley leaves and its possible connection with the effect of heat stress (HS) on the light photosynthetic reactions (LPR). HS was induced by a plunge of dark-adapted leaves in the water bath (24 - 46 °C) for 5 minutes. Such pretreated leaves were cooled down to room temperature and used for gasometric (detection of changes in dark photosynthetic reactions - DPR) and chl a fluorescence measurements (characterization of changes in LPR). At both methods the same intensity of actinic light was used. HS caused a decline of effective quantum yield of photosystem II (PSII) photochemistry (Phi2) and an increase in non-photochemical quenching of Chl a fluorescence (qN) that could be observed already after preheating to 38 °C, while decrease in PR could be first observed only after preheating to 40 °C. Simultaneously we observed rapid decrease in the carboxylation efficiency of Rubisco (dA/dC) after prehea

Druh

D - Stať ve sborníku

CEP obor

BO - Biofyzika

OECD FORD obor

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Projekt

<a href="/cs/project/LN00A141" target="_blank" >LN00A141: Mechanismus, ekofyziologie a biotechnologie fotosyntézy</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2005

Kód důvěrnosti údajů

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

Název statě ve sborníku

Photosynthesis: Fundamental Aspects to Global Perspectives (Proceedings of the 13th International Congress on Photosynthesis; CD-ROM).

ISBN

1-891276-39-5

ISSN

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e-ISSN

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Počet stran výsledku

1000

Strana od-do

566-568

Název nakladatele

Allen Press

Místo vydání

Montreal, Kanada

Místo konání akce

Montreal, Kanada

Datum konání akce

1. 1. 2005

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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