Elevated CO<sub>2</sub> reduces the nitrogen concentration of plant tissues

Francesca, C.M. and Phil, I. and Andy, S. (1998) Elevated CO<sub>2</sub> reduces the nitrogen concentration of plant tissues. Global Change Biology, 4 (1). pp. 43-54.

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Abstract We summarize the impacts of elevated CO<sub>2</sub> on the N concentration of plant tissues and present data to support the hypothesis that reductions in the quality of plant tissue commonly occur when plants are grown under elevated CO<sub>2</sub>. Synthesis of existing data showed an average 14% reduction of N concentrations in plant tissue generated under elevated CO<sub>2</sub> regimes. However, elevated CO<sub>2</sub> appeared to have different effects on the N concentrations of different plant types, as the reported reductions in N have been larger in C3 plants than in C4 plants and N<sub>2</sub>-fixers. Under elevated CO<sub>2</sub> plants changed their allocation of N between above- and below-ground components: root N concentrations were reduced by an average of 9% compared to a 14% average reduction for above-ground tissues. Although the concentration of CO<sub>2</sub> treatments represented a significant source of variance for plant N concentration, no consistent trends were observed between them

Item Type: Article
Uncontrolled Keywords: C3; C4 ;elevated CO2; litter quality; N concentration; N2-fixing plants
Author Affiliation: Facoltá di Scienze Ambientali, II Universitá di Napoli, via Arena 22, 81100 Caserta, Italia
Subjects: Plant Protection
Divisions: Other Crops
Depositing User: Ms K Syamalamba
Date Deposited: 13 Feb 2012 07:53
Last Modified: 13 Feb 2012 07:53
Official URL: http://onlinelibrary.wiley.com/doi/10.1046/j.1365-...
URI: http://eprints.icrisat.ac.in/id/eprint/3038

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