Thermoimaging as a tool for studying light-induced heating of leaves. Correlation of heat dissipation with the efficiency of photosystem II photochemistry and non-photochemical quenching

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F08%3A00005526" target="_blank" >RIV/61989592:15310/08:00005526 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Thermoimaging as a tool for studying light-induced heating of leaves. Correlation of heat dissipation with the efficiency of photosystem II photochemistry and non-photochemical quenching

Original language description

Thermoimaging - a highly sensitive and non-invasive method of temperature measurement - was applied to explore the role of changing photosynthetic efficiency in light-induced heating of tobacco (Nicotiana tabacum cv. Samsun) leaves. In the absence of evaporative cooling through the stomata, which was achieved by covering leaves with Vaseline, illumination with 50-1400 uMphotonsm-2 s-1 intensity of photosynthetically active radiation resulted in cca 1,5 degree C leaf temperature increase in about 2 min.The heating effect showed a non-linear correlation with the extent of nonphotochemical quenching (NPQ) resulting in higher leaf temperatures at higher NPQ values. When leaves were adapted to excessive irradiance (1300 uMphotonsm-2 s-1 for 6 h), which resulted in reduction of photosynthetic efficiency and amplification of NPQ the light-induced heating effect was enhanced. The experimental results have been explained on the basis of a simple theoretical model characterizing the balance of

Czech name

Termoimaging jako nástroj ke studiu světlem-indukovaného zahřáti listů. Korelace teplotní disipace s efektivitou fotochemie fotosystému II a nefotochemických zhášením.

Czech description

Osvětlení listů tabáku (Nicotiana tabacum cv. Samsun) intenzitou 50-1400 uM fotonů m-2 s-1 vedlo k nárůstu teploty listů o asi 1,5 degree C během přibližně 2 min. Nárůst teploty nelineárně koreloval s mírou nefotochemického zhášení (NPQ). Tento výsledekbyl interpretován na základě jednoduchého modelu popisu rovnováhy mezi efektivitou fotochemie PSII a NPQ v listu. Je také diskutována role alternativní disipace energie mimo PSII.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BO - Biophysics

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

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

Name of the periodical

Environmental and Experimental Botany

ISSN

0098-8472

e-ISSN

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Volume of the periodical

64

Issue of the periodical within the volume

1

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

7

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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