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Statements

Subject Item
n2:RIV%2F67179843%3A_____%2F14%3A00440777%21RIV15-GA0-67179843
rdf:type
skos:Concept n14:Vysledek
dcterms:description
It has been suggested that atmospheric CO2 concentration and frequency of cloud cover will increase in future. It remains unclear, however, how elevated CO2 influences photosynthesis under complex clear versus cloudy sky conditions. Accordingly, diurnal changes in photosynthetic responses among beech trees grown at ambient (AC) and doubled (EC) CO2 concentrations were studied under contrasting sky conditions. EC stimulated the daily sum of fixed CO2 and light use efficiency under clear sky. Meanwhile, both these parameters were reduced under cloudy sky as compared with AC treatment. Reduction in photosynthesis rate under cloudy sky was particularly associated with EC-stimulated, xanthophyll-dependent thermal dissipation of absorbed light energy. Under clear sky, a pronounced afternoon depression of CO2 assimilation rate was found in sun-adapted leaves under EC compared with AC conditions. This was caused in particular by stomata closure mediated by vapour pressure deficit. It has been suggested that atmospheric CO2 concentration and frequency of cloud cover will increase in future. It remains unclear, however, how elevated CO2 influences photosynthesis under complex clear versus cloudy sky conditions. Accordingly, diurnal changes in photosynthetic responses among beech trees grown at ambient (AC) and doubled (EC) CO2 concentrations were studied under contrasting sky conditions. EC stimulated the daily sum of fixed CO2 and light use efficiency under clear sky. Meanwhile, both these parameters were reduced under cloudy sky as compared with AC treatment. Reduction in photosynthesis rate under cloudy sky was particularly associated with EC-stimulated, xanthophyll-dependent thermal dissipation of absorbed light energy. Under clear sky, a pronounced afternoon depression of CO2 assimilation rate was found in sun-adapted leaves under EC compared with AC conditions. This was caused in particular by stomata closure mediated by vapour pressure deficit.
dcterms:title
Impact of elevated CO2 concentration on dynamics of leaf photosynthesis in Fagus sylvatica is modulated by sky conditions Impact of elevated CO2 concentration on dynamics of leaf photosynthesis in Fagus sylvatica is modulated by sky conditions
skos:prefLabel
Impact of elevated CO2 concentration on dynamics of leaf photosynthesis in Fagus sylvatica is modulated by sky conditions Impact of elevated CO2 concentration on dynamics of leaf photosynthesis in Fagus sylvatica is modulated by sky conditions
skos:notation
RIV/67179843:_____/14:00440777!RIV15-GA0-67179843
n3:aktivita
n12:I n12:P
n3:aktivity
I, P(GA13-28093S), P(GAP501/10/0340), P(LM2010007)
n3:cisloPeriodika
FEB 2014
n3:dodaniDat
n15:2015
n3:domaciTvurceVysledku
n4:7131038 n4:1241346 n4:5865662 n4:7674864 n4:6304370 n4:9057765 n4:3280551 n4:3692574
n3:druhVysledku
n16:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n8:predkladatel
n3:idSjednocenehoVysledku
20606
n3:idVysledku
RIV/67179843:_____/14:00440777
n3:jazykVysledku
n11:eng
n3:klicovaSlova
diurnal dynamics; DEPS; european beech; fluorescence; photorespiration; stomatal conductance; xanthophylls
n3:klicoveSlovo
n5:fluorescence n5:DEPS n5:diurnal%20dynamics n5:european%20beech n5:xanthophylls n5:photorespiration n5:stomatal%20conductance
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[6CC3AA51FB63]
n3:nazevZdroje
Environmental Pollution
n3:obor
n18:GK
n3:pocetDomacichTvurcuVysledku
8
n3:pocetTvurcuVysledku
10
n3:projekt
n9:LM2010007 n9:GA13-28093S n9:GAP501%2F10%2F0340
n3:rokUplatneniVysledku
n15:2014
n3:svazekPeriodika
185
n3:tvurceVysledku
Grace, J. Urban, Otmar Šigut, Ladislav Špunda, Vladimír Teslová-Navrátilová, P. Zitová, Martina Holišová, Petra Klem, Karel Marek, Michal V. Šprtová, Mirka
n3:wos
000331672500034
s:issn
0269-7491
s:numberOfPages
10
n13:doi
10.1016/j.envpol.2013.11.009