About: Photosynthetic UV-B response of beech (Fagus sylvatica L.) samplings

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Cloned samplings of beech were exposed to enhanced UV-B irradiation (+25%)continuously over three growing seasons. Analysis of CO2 assimilation, variable chlorophyll a fluorescence, and pigment composition was performed in late summer of the growing season to evaluate the influence of long-term elevated UV-B irradiation. The resulta indicate a positive effect of 25% enhancement of UV-B radiation on photosynthetic characteristics, as well as on the capacity for utilisation of absorbed photons in PS2 photochemical reactions of beech leaves. Investigations of the gas-exchange parameters suggest that the UV-B stimulation is partially related to increased leaf thickness. The significantly higher retention of the deepoxidised xantophylls contributes to the increased resistance of PS2 in UV-B treated plants against photoinhibition. Cloned samplings of beech were exposed to enhanced UV-B irradiation (+25%)continuously over three growing seasons. Analysis of CO2 assimilation, variable chlorophyll a fluorescence, and pigment composition was performed in late summer of the growing season to evaluate the influence of long-term elevated UV-B irradiation. The resulta indicate a positive effect of 25% enhancement of UV-B radiation on photosynthetic characteristics, as well as on the capacity for utilisation of absorbed photons in PS2 photochemical reactions of beech leaves. Investigations of the gas-exchange parameters suggest that the UV-B stimulation is partially related to increased leaf thickness. The significantly higher retention of the deepoxidised xantophylls contributes to the increased resistance of PS2 in UV-B treated plants against photoinhibition. (en) Klonované sazenice buku byly po tři vegetační sezóny vystaveny zvýšené UV-B radiaci. Ke konci třetí vegetační sezóny (pozdní léto) byla pro určení dlouhodobého vlivu zvýšené UV-B radiace provedena analýza asimilace CO2, variabilní fluorescence chlorofylu a a analýza pigmentů. 25% navýšení UV-B se projevilo pozitivně na parametrech fotosyntetické charakteristiky a rovněž bylo spojeno se stimulací fotochemické účinnosti PS2. Gazometrickou analýzou zjištěná stimulace fotosyntézy může souviset s nárůstem specifické listové hmotnosti a s tím spojenou větší tloušťkou listu. Podstatně vyšší udržení deepoxidovaného stavu xantofylů přispívá k vyšší odolnosti PS2 rostlin vystavených UV-B radiaci proti fotoinhibici. (cs)
Title	Photosynthetic UV-B response of beech (Fagus sylvatica L.) samplings Photosynthetic UV-B response of beech (Fagus sylvatica L.) samplings (en) Fotosyntetická odezva sazenic buku (Fagus sylvatica) k UV-B záření (cs)
skos:prefLabel	Photosynthetic UV-B response of beech (Fagus sylvatica L.) samplings Photosynthetic UV-B response of beech (Fagus sylvatica L.) samplings (en) Fotosyntetická odezva sazenic buku (Fagus sylvatica) k UV-B záření (cs)
skos:notation	RIV/67179843:_____/03:00102773!RIV/2005/AV0/A22005/N
http://linked.open.../vavai/riv/strany	533;543
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(IBS6087005), P(LN00A141), Z(AV0Z6087904)
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2005
http://linked.open...aciTvurceVysledku	Marek, Michal Vladimír Šprtová, Mirka
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Centrum výzkumu globální změny AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	620867
http://linked.open...ai/riv/idVysledku	RIV/67179843:_____/03:00102773
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	carotenoids; chlorophyll a fluorescence; photosystem 2 (en)
http://linked.open.../riv/klicoveSlovo	chlorophyll a fluorescence carotenoids photosystem 2
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[6861C2799B32]
http://linked.open...i/riv/nazevZdroje	Photosynthetica
http://linked.open...in/vavai/riv/obor	EH
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Mechanism, ecophysiology and biotechnology of photosynthesis Management of Norway spruce stand resulting in an enhancement of its carbon storage capacity
http://linked.open...UplatneniVysledku	2003
http://linked.open...v/svazekPeriodika	41
http://linked.open...iv/tvurceVysledku	Šprtová, Mirka Kalina, J. Marek, Vladimír Michal Špunda, V.
http://linked.open...n/vavai/riv/zamer	Ecology of the man's influencd landscape
issn	0300-3604
number of pages	13 (xsd:int)

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