RT Journal Article T1 Agricultural management and pesticide use reduce the functioning of beneficial plant symbionts A1 Edlinger, Anna A1 Garland, Gina A1 Hartman Kyle, A1 Banerjee, Samiran A1 Degrune, Florine A1 García Palacios, Pablo A1 Hallin, Sara A1 Valzano Held, Alain A1 Herzog, Chantal A1 Jansa, Jan A1 Kost, Elena A1 Maestre, Fernando A1 Sánchez Pescador, David A1 Philippot, Laurent A1 Rillig, Matthias A1 Romdhane, Sana A1 Saghaï, Aurélien A1 Spor, Ayme A1 Frossard, Emmanuel A1 van der Heijden, Marcel AB Phosphorus (P) acquisition is key for plant growth. Arbuscular mycorrhizal fungi (AMF) help plants acquire P from soil. Understanding which factors drive AMF-supported nutrient uptake is essential to develop more sustainable agroecosystems. Here we collected soils from 150 cereal fields and 60 non-cropped grassland sites across a 3,000 km trans-European gradient. In a greenhouse experiment, we tested the ability of AMF in these soils to forage for the radioisotope 33P from a hyphal compartment. AMF communities in grassland soils were much more efficient in acquiring 33P and transferred 64% more 33P to plants compared with AMF in cropland soils. Fungicide application best explained hyphal 33P transfer in cropland soils. The use of fungicides and subsequent decline in AMF richness in croplands reduced 33P uptake by 43%. Our results suggest that land-use intensity and fungicide use are major deterrents to the functioning and natural nutrient uptake capacity of AMF in agroecosystems. PB Springer Nature YR 2022 FD 2022 LK https://hdl.handle.net/20.500.14352/92715 UL https://hdl.handle.net/20.500.14352/92715 LA eng NO Edlinger, A., Garland, G., Hartman, K. et al. Agricultural management and pesticide use reduce the functioning of beneficial plant symbionts. Nat Ecol Evol 6, 1145–1154 (2022). https://doi.org/10.1038/s41559-022-01799-8 NO We thank all the farmers and farm managers for allowing us to sample their fields and for completing our detailed questionnaires. We also thank A. Bonvicini, L. Schönholzer, M. Macsai, F. Tamburini, H. Gamper, S. Müller, D. Bürge, M. Zuber, S. Zhao, V. Somerville, A. Brugger, O. Scholz, D. Bugmann, R. Heiz, B. Seitz and M. Roser for help with field work, the design and execution of the greenhouse experiment and lab analyses. We also thank J. Helfenstein and the anonymous reviewers for valuable feedback on the manuscript. The Digging Deeper project was funded through the 2015–2016 BiodivERsA COFUND call for research proposals, with the national funders Swiss National Science Foundation (grant 31BD30-172466), Deutsche Forschungsgemeinschaft (317895346), Swedish Research Council Formas (contract 2016-0194), Ministerio de Economía y Competitividad (Digging_Deeper, Ref. PCIN-2016-028) and Agence Nationale de la Recherche (ANR, France; grant ANR-16-EBI3-0004-01). NO BiodivERsA COFUND NO Swiss National Science Foundation NO Deutsche Forschungsgemeinschaft NO Swedish Research Council NO Ministerio de Economía, Comercio y Empresa (España) NO Agence Nationale de la Recherche (Francia) DS Docta Complutense RD 6 abr 2025