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Artículo

Arbuscular mycorrhiza protects soybean plants against Macrophomina phaseolina even under nitrogen fertilization

Spagnoletti, Federico NicolásIcon ; Cornero, Mariano; Chiocchio, Viviana MonicaIcon ; Lavado, Raul SilvioIcon ; Roberts, IrmaIcon
Fecha de publicación: 01/2020
Editorial: Springer
Revista: European Journal of Plant Pathology
ISSN: 0929-1873
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Agricultura

Resumen

The capacity of arbuscular mycorrhizal fungi (AMF) to alleviate the negative effects incited by root pathogens in a range of plant hosts has been established. On the other hand, accumulated evidence also shows that fertilization practices can negatively impact AMF. Nevertheless, the interaction between AMF, pathogens and fertilizers, especially nitrogen (N) fertilizers, has not been previously reported. In this work, the effect of nitrogen on both the severity of the pathogen Macrophomina phaseolina (charcoal root rot) and the protection by the arbuscular mycorrhiza fungi (AMF) Rhizophagus intraradices was investigated in greenhouse experiments using soybean (Glycine max) as a host. The treatments were two levels of N (0 and 92 kg of urea ha−1), inoculation and non-inoculation with the AMF, and infection and non-infection with the pathogen. Soybean was harvested at R4 phenological stage (completed pod formation). Plant biomass, numbers of pods and leaves, plant height, root length, greenness index, mycorrhizal colonization and disease severity were measured. Pathogen infection reduced soybean biomass and negatively affected the greenness index, but co-inoculation with AMF improved these parameters. Nitrogen fertilization reduced AMF colonization but not arbuscules percentage. N fertilization increased disease severity but mycorrhizal symbiosis was able to reduce it. These results demonstrate that severity of charcoal root-rot disease in N fertilized soybean can be reduced by AMF inoculation. The implication of these results is that N fertilization could increase the risk of diseases in soybean but mycorrhiza could contribute to soybean charcoal root rot control even if the crop is under N fertilization.
Palabras clave: BIOLOGICAL CONTROL , CHARCOAL ROT , FUNGAL DISEASES , NITROGEN FERTILIZATION
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/163833
URL: https://link.springer.com/article/10.1007/s10658-020-01934-w
DOI: https://doi.org/10.1007/s10658-020-01934-w
Colecciones
Articulos(INBA)
Articulos de INST.DE INVEST. EN BIOCIENCIAS AGRICOLAS Y AMBIENTALES
Citación
Spagnoletti, Federico Nicolás; Cornero, Mariano; Chiocchio, Viviana Monica; Lavado, Raul Silvio; Roberts, Irma; Arbuscular mycorrhiza protects soybean plants against Macrophomina phaseolina even under nitrogen fertilization; Springer; European Journal of Plant Pathology; 156; 3; 1-2020; 839-849
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