Reference : Acclimation of Arabidopsis thaliana to long-term CO2 enrichment and nitrogen supply i...
Scientific journals : Article
Life sciences : Phytobiology (plant sciences, forestry, mycology...)
http://hdl.handle.net/2268/8964
Acclimation of Arabidopsis thaliana to long-term CO2 enrichment and nitrogen supply is basically a matter of growth rate adjustment
English
Tocquin, Pierre mailto [Université de Liège - ULg > Département des sciences de la vie > Biochimie végétale >]
Ormenese, Sandra mailto [Université de Liège - ULg > > GIGA-Management : Plate-forme imagerie >]
Pieltain, Alexandra mailto [Université de Liège - ULg > Département des sciences de la vie > Physiologie végétale >]
Detry, Nathalie mailto [Université de Liège - ULg > Département des sciences de la vie > Département des sciences de la vie >]
Bernier, Georges mailto [Université de Liège - ULg > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences) >]
Périlleux, Claire mailto [Université de Liège - ULg > Département des sciences de la vie > Physiologie végétale >]
2006
Physiologia Plantarum
Blackwell Publishing
128
4
677-688
Yes (verified by ORBi)
International
0031-9317
1399-3054
Copenhagen
Denmark
[en] The long-term response of Arabidopsis thaliana to increasing CO2 was evaluated in plants grown in 800 mu l 1(-1) CO2 from sowing and maintained, in hydroponics, on three nitrogen supplies: "low," "medium" and "high." The global response to high CO2 and N-supply was evaluated by measuring growth parameters in parallel with photosynthetic activity, leaf carbohydrates, ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) messenger RNA and protein, stomatal conductance (g(s)) and density. CO2 enrichment was found to stimulate biomass production, whatever the N-supply. This stimulation was transient on low N-supply and persisted throughout the whole vegetative growth only in high N-supply. Acclimation on low N-high CO2 was not associated with carbohydrate accumulation or with a strong reduction in Rubisco amount or activity. At high N-supply, growth stimulation by high CO2 was mainly because of the acceleration of leaf production and expansion while other parameters such as specific leaf area, root/shoot ratio and g, appeared to be correlated with total leaf area. Our results thus suggest that, in strictly controlled and stable growing conditions, acclimation of A. thaliana to longterm CO2 enrichment is mostly controlled by growth rate adjustment.
http://hdl.handle.net/2268/8964
10.1111/j.1399-3054.2006.00791.x

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