Crops and their wild progenitors recruit beneficial and detrimental soil biota in opposing ways
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Crops and their wild progenitors recruit beneficial and detrimental soil biota in opposing ways Nieves Martín-Robles & Pablo García-Palacios & Marta Rodríguez & Daniel Rico & Rocío Vigo & Sara Sánchez-Moreno & Gerlinde B. De Deyn & Rubén Milla
Received: 9 April 2020 / Accepted: 1 September 2020 # Springer Nature Switzerland AG 2020
Abstract Aims Conventional agriculture promotes negative feedbacks of soil microbes on crop performance (plant soil feedbacks, PSFs) by stimulating species-specific pathogens. Crop traits, modified by domestication, also influence PSFs. Therefore, we asked if crop cultivars and their wild progenitors promote soil pathogens and mutualists differently, and thus trigger different PSFs.
Responsible Editor: Sven Marhan. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11104-020-04703-0) contains supplementary material, which is available to authorized users. N. Martín-Robles : M. Rodríguez : D. Rico : R. Vigo : R. Milla (*) Departamento de Biología y Geología, Área de Biodiversidad y Conservación, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, c/Tulipán s/n, 28933 Móstoles, Spain e-mail: [email protected] P. García-Palacios Instituto de Ciencias Agrarias, Consejo Superior de Investigaciones Científicas, c/Serrano 115 dpdo., 28006 Madrid, Spain S. Sánchez-Moreno Departamento de Medio Ambiente y Agronomía National Institute for Agriculture and Food Research and Technology, Ctra. de la Coruña km 7.5, 28040 Madrid, Spain G. B. De Deyn Soil Biology Group, Wageningen University and Research, PO Box 47, 6700 AA Wageningen, The Netherlands
Methods We studied PSFs in cultivated varieties and wild progenitors of ten crops. In a first season, we grew all genotypes separately in a common soil to obtain genotype-specific soil inocula (‘trained soil’) for a second season. In season two, we examined the effects of the trained soil on plant interactions with arbuscular mycorrhizal fungi and with root-feeding nematodes, and on plant performance. Results Mycorrhizal colonization was lower, and nematode infection rate was higher, in plant roots growing on soils previously trained by domesticated plants. Moreover, domesticated plants showed lower mycorrhizal colonization, and higher nematode infection rates than their wild progenitors, irrespective of previous soil training. The response of plant performance to soil training was species-specific and unrelated to cultivated vs wild status. Conclusions Soil legacies differed between cultivated varieties and their wild progenitors, suggesting an impact of domestication on the way rhizosphere organisms are recruited, on the resistance of plants to herbivores, and on their interactions with root mutualists. Keywords Crop wild progenitors . Domestication . Mycorrhizal colonization . Nematode infection . Plant soil feedbacks . Root-associated microorganism
Introduction Plants influence the composition and diversity of soil communities through multiple pathway
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