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Statements

Subject Item
n2:RIV%2F67179843%3A_____%2F13%3A00395018%21RIV14-GA0-67179843
rdf:type
skos:Concept n15:Vysledek
dcterms:description
In this study, we tested the hypothesis that an elevated CO2 concentration leads to a shift of the temperature optimum of the photosynthetic rate in trees. Since the elevated CO2 treatment usually leads to a significant decrease in stomatal conductance and consequently to decrease in transpiration followed by an increase in leaf temperature, we hypothesized that elevated CO2 results in the acclimation of photosynthetic apparatus to the higher temperature. We studied the two most common species in the Czech Republic – European beech (Fagus sylvatica L.) and Norway spruce (Picea abies (L.) Karsten). The eight-year-old trees were grown in glass domes at the experimental research site Bílý Kříž in the Beskydy Mts. and they were exposed to ambient (AC; 385 μmol CO2 mol-1) and elevated CO2 concentrations (EC; 700 μmol CO2 mol-1). Based on the gas-exchange and fluorescence techniques we determined the basic photosynthetic characteristics in the range of leaf temperatures from 10 to 45 °C. The changes in temperature acclimation of tree species studied were evaluated on the basis of the shift of temperature optima. EC treatment led indeed to an increase of leaf temperature up to 3.5 °C in both species studied. The temperature optimum of the light-saturated rate of CO2 assimilation, measured at the growth CO2 concentration (i.e. 385 for AC and 700 μmol CO2 mol-1 for EC trees), was higher by 3 °C in both tree species of the EC variant. Although the shift in photosynthetic temperature optimum disappeared when the AC plants were exposed to an elevated CO2 concentration, an acclimation of Rubisco carboxylation and electron transport to higher temperature was observed. In this study, we tested the hypothesis that an elevated CO2 concentration leads to a shift of the temperature optimum of the photosynthetic rate in trees. Since the elevated CO2 treatment usually leads to a significant decrease in stomatal conductance and consequently to decrease in transpiration followed by an increase in leaf temperature, we hypothesized that elevated CO2 results in the acclimation of photosynthetic apparatus to the higher temperature. We studied the two most common species in the Czech Republic – European beech (Fagus sylvatica L.) and Norway spruce (Picea abies (L.) Karsten). The eight-year-old trees were grown in glass domes at the experimental research site Bílý Kříž in the Beskydy Mts. and they were exposed to ambient (AC; 385 μmol CO2 mol-1) and elevated CO2 concentrations (EC; 700 μmol CO2 mol-1). Based on the gas-exchange and fluorescence techniques we determined the basic photosynthetic characteristics in the range of leaf temperatures from 10 to 45 °C. The changes in temperature acclimation of tree species studied were evaluated on the basis of the shift of temperature optima. EC treatment led indeed to an increase of leaf temperature up to 3.5 °C in both species studied. The temperature optimum of the light-saturated rate of CO2 assimilation, measured at the growth CO2 concentration (i.e. 385 for AC and 700 μmol CO2 mol-1 for EC trees), was higher by 3 °C in both tree species of the EC variant. Although the shift in photosynthetic temperature optimum disappeared when the AC plants were exposed to an elevated CO2 concentration, an acclimation of Rubisco carboxylation and electron transport to higher temperature was observed.
dcterms:title
Growth under elevated CO2 concentration affects the temperature response of photosynthetic rate Growth under elevated CO2 concentration affects the temperature response of photosynthetic rate
skos:prefLabel
Growth under elevated CO2 concentration affects the temperature response of photosynthetic rate Growth under elevated CO2 concentration affects the temperature response of photosynthetic rate
skos:notation
RIV/67179843:_____/13:00395018!RIV14-GA0-67179843
n15:predkladatel
n16:ico%3A67179843
n3:aktivita
n5:P n5:I
n3:aktivity
I, P(GA13-28093S), P(GAP501/10/0340), P(LM2010007)
n3:cisloPeriodika
1
n3:dodaniDat
n11:2014
n3:domaciTvurceVysledku
n12:3280551 n12:3692574 n12:7674864 n12:6304370
n3:druhVysledku
n10:J
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
76947
n3:idVysledku
RIV/67179843:_____/13:00395018
n3:jazykVysledku
n19:eng
n3:klicovaSlova
CO2 assimilation rate; Fagus sylvatica; chlorophyll fluorescence; Picea abies; Rubisco
n3:klicoveSlovo
n4:CO2%20assimilation%20rate n4:Fagus%20sylvatica n4:Rubisco n4:Picea%20abies n4:chlorophyll%20fluorescence
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[ECB1C0DE9E42]
n3:nazevZdroje
Beskydy
n3:obor
n14:ED
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n9:GA13-28093S n9:LM2010007 n9:GAP501%2F10%2F0340
n3:rokUplatneniVysledku
n11:2013
n3:svazekPeriodika
6
n3:tvurceVysledku
Urban, Otmar Šigut, Ladislav Klem, Karel Holišová, Petra
s:issn
1803-2451
s:numberOfPages
10
n18:doi
10.11118/beskyd201306010043