Poster: Global Change

Abs # 59: Dynamics of carbon and nitrogen metabolites in soybean grown throughout its life cycle under open-air carbon dioxide enrichment

Presenter:	Rogers, Alistair , arogers@bnl.gov
Authors	Rogers, Alistair  (A)   Gibon, Yves  (B)   Mark, Stitt  (B)   Wittig, Victoria E (C)   Bernacchi, Carl J (C)   Harrison, Mark R (C)   Long, Stephen P (C)
Affiliations:	(A): Brookhaven National Laboratory (B): Max-Planck-Institut fur Molekulare Pflanzenphysiologie (C): University of Illinois, Urbana-Champaign
Web Site:	http://www.soyface.uiuc.edu

Predicted increases in the concentration of atmospheric carbon dioxide offer the chance for increased plant productivity. However, sustained growth in elevated CO₂ is dependant upon the adequate supply of other nutrients, notably nitrogen. In order to increase understanding of the balance between carbon and nitrogen supply and the sustainability of CO₂ stimulated growth it is necessary to measure key parameters of carbon and nitrogen metabolism in parallel, and throughout the life cycle of the plant. SoyFACE, where Glycine max is grown under elevated CO₂ concentration in the field using Free Air CO₂ Enrichment technology, provided a unique opportunity to make these measurements in an important crop species, grown using current agricultural practices. To our knowledge, for the first time, we present a detailed assessment of foliar carbon and nitrogen metabolism in soybean grown throughout its life cycle in elevated CO₂ under agriculturally managed field conditions.