The effects of elevated [CO2] on the C:N and C:P mass ratios of plant tissues

By R. Gifford, D. Barrett, J. Lutze. Plant and Soil, 2000

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The C:N:P stoichiometry of organisms and ecosystems in a changing world: A review and perspectives (2012, background): “Elevated concentrations of atmospheric CO2 (hereafter [CO2]) increase the aboveground plant C:N ratios in many terrestrial plants (Hungate et al., 1996; Cotrufo et al., 1998; Gifford et al., 2000; Stiling and Cornelissen, 2007; Lindroth, 2010) (Fig.”
Mineral stress: the missing link in understanding how global climate change will affect plants in real world soils (2004, background): “Dilution effects for P are uncertain due to a small number of observations and variable results (Gifford et al., 2000).”
Canopy photosynthesis, evapotranspiration, leaf nitrogen, and transcription profiles of maize in response to CO2 enrichment (2006, background): “Elevated Ca has been shown to reduce leaf nitrogen in C3 plants (Conroy & Hocking, 1993; Stitt & Krapp, 1999; Gifford et al., 2000) and the interaction between elevated Ca and nitrogen was seen to be closely related to acclimation of photosynthesis (Stitt & Krapp, 1999).”
N : P ratios in terrestrial plants: variation and functional significance. (2004, background): “Our knowledge of these interactions is still limited (Gifford et al., 2000).”