%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Trap, Jean
%A Ranoarisoa, P. M.
%A Irshad, U.
%A Plassard, C.
%T Richness of rhizosphere organisms affects plant P nutrition according to P source and mobility
%D 2021
%L fdi:010080985
%G ENG
%J Agriculture
%K soil P status ; rhizospheric organisms ; bacteria ; nematodes ; mycorrhizal ; fungi ; biodiversity-function relationships
%M ISI:000622002500001
%N 2
%P 157 [9 ]
%R 10.3390/agriculture11020157
%U https://www.documentation.ird.fr/hor/fdi:010080985
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers21-03/010080985.pdf
%V 11
%W Horizon (IRD)
%X Plants evolve complex interactions with diverse soil mutualist organisms to enhance P mobilization from the soil. These strategies are particularly important when P is poorly available. It 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. Using 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. The 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. In 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). We 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.
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