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rdf:type
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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)
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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)
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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)
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skos:notation
| - RIV/67179843:_____/03:00102773!RIV/2005/AV0/A22005/N
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http://linked.open.../vavai/riv/strany
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http://linked.open...avai/riv/aktivita
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http://linked.open...avai/riv/aktivity
| - P(IBS6087005), P(LN00A141), Z(AV0Z6087904)
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http://linked.open...iv/cisloPeriodika
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http://linked.open...vai/riv/dodaniDat
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http://linked.open...aciTvurceVysledku
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http://linked.open.../riv/druhVysledku
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http://linked.open...iv/duvernostUdaju
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http://linked.open...titaPredkladatele
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http://linked.open...dnocenehoVysledku
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http://linked.open...ai/riv/idVysledku
| - RIV/67179843:_____/03:00102773
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - carotenoids; chlorophyll a fluorescence; photosystem 2 (en)
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http://linked.open.../riv/klicoveSlovo
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http://linked.open...odStatuVydavatele
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http://linked.open...ontrolniKodProRIV
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http://linked.open...i/riv/nazevZdroje
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http://linked.open...in/vavai/riv/obor
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http://linked.open...ichTvurcuVysledku
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http://linked.open...cetTvurcuVysledku
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http://linked.open...vavai/riv/projekt
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http://linked.open...UplatneniVysledku
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http://linked.open...v/svazekPeriodika
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http://linked.open...iv/tvurceVysledku
| - Šprtová, Mirka
- Kalina, J.
- Marek, Vladimír Michal
- Špunda, V.
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http://linked.open...n/vavai/riv/zamer
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issn
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number of pages
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