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Titolo:
Beech trees exposed to high CO2 and to simulated summer ozone levels: Effects on photosynthesis, chloroplast components and leaf enzyme activity
Autore:
Lutz, C; Anegg, S; Gerant, D; Alaoui-Sosse, B; Gerard, J; Dizengremel, P;
Indirizzi:
Innsbruck Univ, Inst Bot, A-6020 Innsbruck, Austria Innsbruck Univ Innsbruck Austria A-6020 t Bot, A-6020 Innsbruck, Austria GSF, Natl Res Ctr Environm & Hlth, Inst Biochem Plant Pathol, D-85764 Oberschleissheim, Germany GSF Oberschleissheim Germany D-85764 , D-85764 Oberschleissheim, Germany Univ Nancy 1, Lab Biol Forestiere, Equipe Ecophysiol Cellulaire, F-54506 Vandoeuvre Nancy, France Univ Nancy 1 Vandoeuvre Nancy France F-54506 06 Vandoeuvre Nancy, France Lab Biol & Ecophysiol, F-25030 Besancon, France Lab Biol & Ecophysiol Besancon France F-25030 , F-25030 Besancon, France
Titolo Testata:
PHYSIOLOGIA PLANTARUM
fascicolo: 3, volume: 109, anno: 2000,
pagine: 252 - 259
SICI:
0031-9317(200007)109:3<252:BTETHC>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
FAGUS-SYLVATICA L; PHOSPHOENOLPYRUVATE CARBOXYLASE ACTIVITY; ATMOSPHERIC CARBON-DIOXIDE; LONG-TERM EXPOSURE; NORWAY SPRUCE; ELEVATED CO2; AIR-POLLUTANTS; SPECTROPHOTOMETRIC ASSAY; TROPOSPHERIC OZONE; NET PHOTOSYNTHESIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
56
Recensione:
Indirizzi per estratti:
Indirizzo: Lutz, C Innsbruck Univ, Inst Bot, Sternwartestr 15, A-6020 Innsbruck, Austria Innsbruck Univ Sternwartestr 15 Innsbruck Austria A-6020 Austria
Citazione:
C. Lutz et al., "Beech trees exposed to high CO2 and to simulated summer ozone levels: Effects on photosynthesis, chloroplast components and leaf enzyme activity", PHYSL PLANT, 109(3), 2000, pp. 252-259

Abstract

Young trees of European beech (Fagus sylvatica L.) were exposed in a phytotron to different levels of ozone and CO2 under the climatic simulation of one vegetation period. High ozone levels were simulated similar to high ozone concentration in the field (up to 110 ppb), while CO2 was added as 300 ppm to the present level of ca 380 ppm. Our study describes different aspects of photosynthesis from the leaf level to the reactions of selected thylakoid components at different harvest times during growth of the beech trees under the different fumigation regimes. Ozone effects appeared in the firstweeks of the treatment as a stimulation of chlorophyll fluorescence (F-v/F-m), in oxygen production and in ribulose-1,5-bisphosphate carboxylase/oxygenase activity, while the summer and early autumn harvests showed strong reductions in these parameters. Only phosphoenolpyruvate carboxylase (PEPcase) activity remained higher under high ozone. The effects of high CO2 appeared in general as a small stimulation in enzyme activity like PEPcase in spring. However, with increasing time of fumigation, reductions of all parameters were observed. Especially chlorophylls showed strong reductions under high CO2. The combined treatment with high ozone plus high CO2 resulted mostly in an amelioration of the negative ozone effects, although control levels were not reached.

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Documento generato il 01/12/20 alle ore 00:35:40