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Why is plant-growth response to elevated CO2 amplified when water is limiting, but reduced when nitrogen is limiting? A growth-optimisation hypothesis

McMurtrie, Ross; Norby, Richard J; Medlyn, Belinda E.; Dewar, Roderick; Pepper, David A.; Reich, Peter B; Barton, Craig V M


Experimental evidence indicates that the stomatal conductance and nitrogen concentration ([N]) of foliage decline under CO2 enrichment, and that the percentage growth response to elevated CO2 is amplified under water limitation, but reduced under nitrogen limitation. We advance simple explanations for these responses based on an optimisation hypothesis applied to a simple model of the annual carbon-nitrogen-water economy of trees growing at a CO2-enrichment experiment at Oak Ridge, Tennessee,...[Show more]

CollectionsANU Research Publications
Date published: 2008
Type: Journal article
Source: Functional Plant Biology
DOI: 10.1071/FP08128


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