Diversity in phosphorus mobilisation and uptake in ectomycorrhizal fungi |
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| Authors: | Claude Plassard Julien Louche Muhammad A Ali Myriam Duchemin Elvira Legname Benoît Cloutier-Hurteau |
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| Institution: | (1) INRA/IRD/SupAgro Montpellier, UMR 1222, 2, Place Viala, 34060 Montpellier, France |
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| Abstract: | • Introduction
Phosphorus (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. |
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