Elevated CO2 reduces the nitrogen concentration of plant tissues

Francesca, C.M. and Phil, I. and Andy, S. (1998) Elevated CO2 reduces the nitrogen concentration of plant tissues. Global Change Biology, 4 (1). pp. 43-54.

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The effects of elevated CO2 on the N concentration of plant tissues are described, and data are presented to support the hypothesis that reductions in the quality of plant tissue commonly occur when plants are grown under elevated CO2. Previously published data from species including field crops, trees and forage grasses and legumes are tabulated. Synthesis of existing data showed an average 14% reduction of N concentrations in plant tissue generated under elevated CO2 regimes. However, elevated CO2 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 N2-fixers. Under elevated CO2, plants changed their allocation of N between above- and below-ground components: root N concentrations were reduced by an average of 9% compared with a 14% average reduction for above-ground tissues. Although the concentration of CO2 treatments represented a significant source of variance for plant N concentration, no consistent trends were observed between them

Item Type: Article
Author Affiliation: Facoltá di Scienze Ambientali, II Universitá di Napoli, via Arena 22, 81100 Caserta, Italia
Subjects: Environmental Science > Ecology
Divisions: Other Crops
Depositing User: Ms K Syamalamba
Date Deposited: 11 Nov 2011 05:15
Last Modified: 11 Nov 2011 05:15
URI: http://eprints.icrisat.ac.in/id/eprint/2759

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