Species-specific effects of elevated CO2 on resource allocation in Plantago maritima and Armeria maritima

Davey, Matthew P.; Harmens, Harry; Ashenden, Trevor W.; Edwards, Robert; Baxter, Robert. 2007 Species-specific effects of elevated CO2 on resource allocation in Plantago maritima and Armeria maritima. Biochemical Systematics and Ecology, 35 (3). 121-129.

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We investigated the effects of increased atmospheric CO2 on the biomass, photosynthesis, protein and phenolic concentrations and content of Plantago maritima and Armeria maritima. This enabled us to test the protein competition model (PCM) for predicting C allocation to phenolics. Three contrasting responses to elevated CO2 (600 mmol CO2 mol1) between the two study species were observed. (1) In P. maritima, plant biomass increased and the maximum carboxylation rate of Rubisco (Vc,max) was decreased. However, in A. maritima, shoot biomass decreased and the Vc,max of Rubisco was unchanged. (2) The total phenolic content increased in P. maritima but decreased in A. maritima. (3) Protein concentrations and content decreased in P. maritima and rootprotein concentrations and content increased in A. maritima. We conclude that C and N allocation to phenolics and proteins is species- and organ-specific and the PCM predictions were correct when phenolics and proteins were expressed on a per plant content basis.

Item Type: Publication - Article
Digital Object Identifier (DOI):
Programmes: CEH Programmes pre-2009 publications > Biogeochemistry
UKCEH and CEH Sections/Science Areas: Emmett
ISSN: ISSN: 0305-1978
Additional Keywords: Armeria maritima, phenolics, Plantago maritima, proteins, protein competition model, rubisco
NORA Subject Terms: Botany
Ecology and Environment
Atmospheric Sciences
Date made live: 19 Dec 2007 16:24 +0 (UTC)

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