Diversity in phosphorus mobilisation and uptake in ectomycorrhizal fungi

By C. Plassard, Julien Louche, M. Ali, M. Duchemin, Elvira Legname, B. Cloutier-Hurteau. Annals of Forest Science, 2011

99 citations recorded by the source corpus.

Abstract• IntroductionPhosphorus (P) is often the first or second element limiting aboveground net primary productivity of forests. Besides low available inorganic orthophosphate (Pi) concentrations, soil may contain high total P contents, as insoluble mineral P or as organic P. Most plants form mycorrhizal associations that improve their P nutrition. Three main hypotheses have been proposed to explain this positive effect through an increase of (1) P mobilisation from mineral P, (2) P mobilisation from organic P and (3) soil exploration and P uptake. However, the positive effect of mycorrhizal symbiosis may be variable with the fungal species forming the association. This could be due to the different abilities of mycorrhizal fungi to mobilise P and/or to take up Pi from the soil.• ObjectivesThe aim of this review was to examine our current knowledge about the capacity of ectomycorrhizal fungi to release organic compounds as low-molecular-weight organic anions and phosphatases thought to have a role for mineral and organic P mobilisation, respectively. The diversity of Pi transporters among mycorrhizal species is also examined.• ResultsThe main conclusion is that the study of the functional diversity of ectomycorrhizal fungi in situ is still a challenging question and could be addressed by combining different tools now available to make large-scale studies.

Subfields: Plant Science, Soil Science

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Citations in the corpus

Enzyme secretion by ECM fungi and exploitation of mineral nutrients from soil organic matter (2011, background): “The diversity of phosphorus mobilisation and uptake in ectomycorrhizal fungi is addressed in detail by Plassard et al. (2011) in this issue.”
The Role of Soil Microorganisms in Plant Mineral Nutrition—Current Knowledge and Future Directions (2017, background): “For phosphorous, the literature contains a large number of reports of both fungal and bacterial strains with the capacity to solubilize inorganic P, and also many reports of strains that can mineralize organic P (Plassard et al., 2011; Ahemad and Kibret, 2014).”
Linkage between tree species richness and soil microbial diversity improves phosphorus bioavailability (2019, background): “Organic acids are commonly secreted by plant roots or mycorrhizas (Jones, Dennis, Owen, & Hees, 2003; Plassard et al., 2011), resulting in a stronger relationship between tree species richness and citric‐”
Acquisition of phosphorus and other poorly mobile nutrients by roots. Where do plant nutrition models fail? (2011, background): “Besides siderophores, the capacity of fungi, whether saprotrophic or symbiotic, to release low molecular weight organic acids is well known despite the high degree of diversity among fungal species (Plassard and Fransson 2009; Plassard et al. 2011).”