Abstract
Aims
Plant P acquisition strategies are driven by multiple belowground morphological and physiological traits as well as interactions among these traits. This study aimed to characterize the relationships among traits involved in P acquisition to explore tradeoffs and the main P-acquisition strategies and their mediation by soil type.
Methods
Ten morphological and physiological traits involved in P acquisition were measured across 13 species grown in controlled conditions in two contrasting soils with moderate P limitation.
Results
Tradeoffs between thicker and thinner roots were observed, with thicker roots exhibiting greater carboxylate release or phosphatase activity in the rhizosheath. Tradeoffs and coordination amongst traits were strongly mediated by soil type. Multivariate analysis of functional traits involved in P acquisition highlighted four main P-acquisition strategies relying primarily on morphological traits, physiological traits or a combination thereof.
Conclusions
The diversity of strategies demonstrates a potential for functional diversity benefits in cultivated plant communities via preferential access to different P pools leading to complementarities and reduced competition for resource acquisition. Overall, our results underpin functionally-complementary multispecies crop designs, enhancing P availability and cycling efficiency.
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Abbreviations
- ΔpH:
-
Change in rhizosheath pH
- PME:
-
Phosphomonoesterase activity
- RLD:
-
Root length density
- SLA:
-
Specific leaf area
- SRL:
-
Specific root length
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Acknowledgements
The authors thank Vivescia for their financial and technical assistance. We also thank Aurore Coutelier, Matthieu Forster, Philippe Jacolot, Céline Roisin and Erika Samain for their technical assistance. The project received funding from the ANRT (Association Nationale Recherche Technologie).
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Nicolas Honvault carried out the experiment and wrote the manuscript with support from Michel-Pierre Faucon, David Houben and Hans Lambers. Stéphane Firmin and Cécile Nobile helped process the data and perform the analyses. All authors contributed to the final version of the manuscript.
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Honvault, N., Houben, D., Nobile, C. et al. Tradeoffs among phosphorus-acquisition root traits of crop species for agroecological intensification. Plant Soil 461, 137–150 (2021). https://doi.org/10.1007/s11104-020-04584-3
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DOI: https://doi.org/10.1007/s11104-020-04584-3