The impact of elevated carbon dioxide on the phosphorus nutrition of plants: a review
© The Author 2015.
Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved.
Background: Increasing attention is being focused on the influence of rapid increases in atmospheric CO2 concentration on nutrient cycling in ecosystems. An understanding of how elevated CO2 affects plant utilization and acquisition of phosphorus (P) will be critical for P management to maintain ecosystem sustainability in P-deficient regions. • Scope: This review focuses on the impact of elevated CO2 on plant P demand, utilization in plants and P acquisition from soil. Several knowledge gaps on elevated CO2-P associations are highlighted. • Conclusions: Significant increases in P demand by plants are likely to happen under elevated CO2 due to the stimulation of photosynthesis, and subsequent growth responses. Elevated CO2 alters P acquisition through changes in root morphology and increases in rooting depth. Moreover, the quantity and composition of root exudates are likely to change under elevated CO2, due to the changes in carbon fluxes along the glycolytic pathway and the tricarboxylic acid cycle. As a consequence, these root exudates may lead to P mobilization by the chelation of P from sparingly soluble P complexes, by the alteration of the biochemical environment and by changes to microbial activity in the rhizosphere. Future research on chemical, molecular, microbiological and physiological aspects is needed to improve understanding of how elevated CO2 might affect the use and acquisition of P by plants.
This research was supported by an Australian Research Council Linkage Project (LP100200757).
JournalAnnals of Botany
Pagination13p. (p. 987-999)
PublisherOxford University Press (OUP)
Rights StatementThe Author reserves all moral rights over the deposited text and must be credited if any re-use occurs. Documents deposited in OPAL are the Open Access versions of outputs published elsewhere. Changes resulting from the publishing process may therefore not be reflected in this document. The final published version may be obtained via the publisher’s DOI. Please note that additional copyright and access restrictions may apply to the published version.
Science & TechnologyLife Sciences & BiomedicinePlant SciencesElevated CO2climate changeplant nutritionphosphorous uptakeP transformationP-use efficiencyroot morphologyroot exudatesmicrobial communityAIR CO2 ENRICHMENTSOIL ORGANIC-MATTERARBUSCULAR MYCORRHIZAL FUNGIROOT-SYSTEM ARCHITECTUREATMOSPHERIC CO2WHITE-LUPINPROTEOID ROOTSUSE EFFICIENCYRHIZOSPHERE PROCESSESPHOSPHATE STARVATIONPlantsPlant RootsCarbon DioxidePhosphorusSoilSoil MicrobiologyEcosystemPhotosynthesisPlant Exudatesmicrobial community.Plant Biology & Botany