@article{fdi:010080985, title = {{R}ichness of rhizosphere organisms affects plant {P} nutrition according to {P} source and mobility}, author = {{T}rap, {J}ean and {R}anoarisoa, {P}. {M}. and {I}rshad, {U}. and {P}lassard, {C}.}, editor = {}, language = {{ENG}}, abstract = {{P}lants evolve complex interactions with diverse soil mutualist organisms to enhance {P} mobilization from the soil. {T}hese strategies are particularly important when {P} is poorly available. {I}t is still unclear how the soil {P} source (e.g., mineral {P} versus recalcitrant organic {P}) and its mobility in the soil (high or low) affect soil mutualist biological (ectomycorrhizal fungi, bacteria and bacterial-feeding nematodes) richness-plant {P} acquisition relationships. {U}sing a set of six microcosm experiments conducted in growth chamber across contrasting {P} situations, we tested the hypothesis that the relationship between the increasing addition of soil mutualist organisms in the rhizosphere of the plant and plant {P} acquisition depends on {P} source and mobility. {T}he highest correlation ({R}-2 = 0.70) between plant {P} acquisition with soil rhizosphere biological richness was found in a high {P}-sorbing soil amended with an organic {P} source. {I}n the five other situations, the relationships became significant either in soil conditions, with or without mineral {P} addition, or when the {P} source was supplied as organic {P} in the absence of soil, although with a low correlation coefficient (0.09 < {R}-2 < 0.15). {W}e thus encourage the systematic and careful consideration of the form and mobility of {P} in the experimental trials that aim to assess the role of biological complexity on plant {P} nutrition.}, keywords = {soil {P} status ; rhizospheric organisms ; bacteria ; nematodes ; mycorrhizal ; fungi ; biodiversity-function relationships}, booktitle = {}, journal = {{A}griculture}, volume = {11}, numero = {2}, pages = {157 [9 ]}, year = {2021}, DOI = {10.3390/agriculture11020157}, URL = {https://www.documentation.ird.fr/hor/fdi:010080985}, }