On the determination of QB-non-reducing photosystem II centers from chlorophyll a fluorescence induction.

Kód výsledku v IS VaVaI

RIV/61989592:15410/03:00001532 - isvavai.cz

Nalezeny alternativní kódy

RIV/61988987:17310/03:00000053

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

On the determination of QB-non-reducing photosystem II centers from chlorophyll a fluorescence induction.

Popis výsledku v původním jazyce

The relative height of the so called Fpl ('plateau') appearing between the O and P steps in the initial chlorophyll a fluorescence rise (FR) under low exciting light, is frequently used for a determination of the relative amount of QB-non-reducing photosystem II centers ([PSII-QB-non]rel). On the basis of theoretical approach it has been already suggested that the Fpl level can be influenced, among others, by the intensity of exciting light. In this contribution we present a calculation of [PSII-QB-non]rel from the FRs measured at different intensities of exciting light (2 - 115 micro mol photons m-2 s-1). We have found that the higher intensity of exciting light, the higher is the estimation of [PSII-QB-non]rel (8 - 45%); thus the numerical expressionof [PSII-QB-non]rel using the Fpl level in the FR is not plausible. Our experimental results were also successfully simulated by a simple mathematical model. We recommend to use as low intensity of exciting light as possible for an estima

Název v anglickém jazyce

On the determination of QB-non-reducing photosystem II centers from chlorophyll a fluorescence induction.

Popis výsledku anglicky

The relative height of the so called Fpl ('plateau') appearing between the O and P steps in the initial chlorophyll a fluorescence rise (FR) under low exciting light, is frequently used for a determination of the relative amount of QB-non-reducing photosystem II centers ([PSII-QB-non]rel). On the basis of theoretical approach it has been already suggested that the Fpl level can be influenced, among others, by the intensity of exciting light. In this contribution we present a calculation of [PSII-QB-non]rel from the FRs measured at different intensities of exciting light (2 - 115 micro mol photons m-2 s-1). We have found that the higher intensity of exciting light, the higher is the estimation of [PSII-QB-non]rel (8 - 45%); thus the numerical expressionof [PSII-QB-non]rel using the Fpl level in the FR is not plausible. Our experimental results were also successfully simulated by a simple mathematical model. We recommend to use as low intensity of exciting light as possible for an estima

Druh

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

CEP obor

BO - Biofyzika

OECD FORD obor

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Projekt

LN00A141: Mechanismus, ekofyziologie a biotechnologie fotosyntézy

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

Plant Science

ISSN

0168-9452

e-ISSN

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Svazek periodika

164

Číslo periodika v rámci svazku

N

Stát vydavatele periodika

IR - Íránská islámská republika

Počet stran výsledku

6

Strana od-do

665-670

Kód UT WoS článku

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EID výsledku v databázi Scopus

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