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Agricultural management and pesticide use reduce the functioning of beneficial plant symbionts
Nature Ecology & Evolution ( IF 13.9 ) Pub Date : 2022-07-07 , DOI: 10.1038/s41559-022-01799-8
Anna Edlinger 1, 2 , Gina Garland 1 , Kyle Hartman 1 , Samiran Banerjee 3 , Florine Degrune 4, 5, 6 , Pablo García-Palacios 7 , Sara Hallin 8 , Alain Valzano-Held 1 , Chantal Herzog 1, 2 , Jan Jansa 9 , Elena Kost 1 , Fernando T Maestre 10, 11 , David Sánchez Pescador 12, 13 , Laurent Philippot 14 , Matthias C Rillig 4, 5 , Sana Romdhane 14 , Aurélien Saghaï 8 , Ayme Spor 14 , Emmanuel Frossard 15 , Marcel G A van der Heijden 1, 2
Affiliation  

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.



中文翻译:


农业管理和农药的使用降低了有益植物共生体的功能



磷 (P) 的获取对于植物生长至关重要。丛枝菌根真菌 (AMF) 帮助植物从土壤中获取磷。了解哪些因素驱动 AMF 支持的养分吸收对于开发更可持续的农业生态系统至关重要。在这里,我们从跨欧洲 3,000 公里梯度的 150 个谷物田和 60 个未耕种草地收集了土壤。在温室实验中,我们测试了这些土壤中 AMF 从菌丝室中获取放射性同位素33 P 的能力。与农田土壤中的 AMF 相比,草原土壤中的 AMF 群落获取33 P 的效率要高得多,并且向植物转移的33 P 多 64%。杀菌剂的应用最好地解释了农田土壤中菌丝33 P 的转移。杀菌剂的使用和随后农田 AMF 丰富度的下降使33 P 吸收量减少了 43%。我们的研究结果表明,土地利用强度和杀菌剂的使用是农业生态系统中 AMF 功能和天然养分吸收能力的主要障碍。

更新日期:2022-07-08
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