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Phosphate excess increases susceptibility to pathogen infection in rice

Phosphorus (P) is an essential nutrient for plant growth and productivity. Due to soil fixation, however, phosphorus availability in soil is rarely sufficient to sustain high crop yields. The overuse of fertilizers to circumvent the limited bioavailability of phosphate (Pi) has led to a scenario of...

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Autores principales: Campos‐Soriano, Lidia, Bundó, Mireia, Bach‐Pages, Marcel, Chiang, Su‐Fen, Chiou, Tzyy‐Jen, San Segundo, Blanca
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7060143/
https://www.ncbi.nlm.nih.gov/pubmed/32072745
http://dx.doi.org/10.1111/mpp.12916
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author Campos‐Soriano, Lidia
Bundó, Mireia
Bach‐Pages, Marcel
Chiang, Su‐Fen
Chiou, Tzyy‐Jen
San Segundo, Blanca
author_facet Campos‐Soriano, Lidia
Bundó, Mireia
Bach‐Pages, Marcel
Chiang, Su‐Fen
Chiou, Tzyy‐Jen
San Segundo, Blanca
author_sort Campos‐Soriano, Lidia
collection PubMed
description Phosphorus (P) is an essential nutrient for plant growth and productivity. Due to soil fixation, however, phosphorus availability in soil is rarely sufficient to sustain high crop yields. The overuse of fertilizers to circumvent the limited bioavailability of phosphate (Pi) has led to a scenario of excessive soil P in agricultural soils. Whereas adaptive responses to Pi deficiency have been deeply studied, less is known about how plants adapt to Pi excess and how Pi excess might affect disease resistance. We show that high Pi fertilization, and subsequent Pi accumulation, enhances susceptibility to infection by the fungal pathogen Magnaporthe oryzae in rice. This fungus is the causal agent of the blast disease, one of the most damaging diseases of cultivated rice worldwide. Equally, MIR399f overexpression causes an increase in Pi content in rice leaves, which results in enhanced susceptibility to M. oryzae. During pathogen infection, a weaker activation of defence‐related genes occurs in rice plants over‐accumulating Pi in leaves, which is in agreement with the phenotype of blast susceptibility observed in these plants. These data support that Pi, when in excess, compromises defence mechanisms in rice while demonstrating that miR399 functions as a negative regulator of rice immunity. The two signalling pathways, Pi signalling and defence signalling, must operate in a coordinated manner in controlling disease resistance. This information provides a basis to understand the molecular mechanisms involved in immunity in rice plants under high Pi fertilization, an aspect that should be considered in management of the rice blast disease.
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spelling pubmed-70601432020-03-11 Phosphate excess increases susceptibility to pathogen infection in rice Campos‐Soriano, Lidia Bundó, Mireia Bach‐Pages, Marcel Chiang, Su‐Fen Chiou, Tzyy‐Jen San Segundo, Blanca Mol Plant Pathol Original Articles Phosphorus (P) is an essential nutrient for plant growth and productivity. Due to soil fixation, however, phosphorus availability in soil is rarely sufficient to sustain high crop yields. The overuse of fertilizers to circumvent the limited bioavailability of phosphate (Pi) has led to a scenario of excessive soil P in agricultural soils. Whereas adaptive responses to Pi deficiency have been deeply studied, less is known about how plants adapt to Pi excess and how Pi excess might affect disease resistance. We show that high Pi fertilization, and subsequent Pi accumulation, enhances susceptibility to infection by the fungal pathogen Magnaporthe oryzae in rice. This fungus is the causal agent of the blast disease, one of the most damaging diseases of cultivated rice worldwide. Equally, MIR399f overexpression causes an increase in Pi content in rice leaves, which results in enhanced susceptibility to M. oryzae. During pathogen infection, a weaker activation of defence‐related genes occurs in rice plants over‐accumulating Pi in leaves, which is in agreement with the phenotype of blast susceptibility observed in these plants. These data support that Pi, when in excess, compromises defence mechanisms in rice while demonstrating that miR399 functions as a negative regulator of rice immunity. The two signalling pathways, Pi signalling and defence signalling, must operate in a coordinated manner in controlling disease resistance. This information provides a basis to understand the molecular mechanisms involved in immunity in rice plants under high Pi fertilization, an aspect that should be considered in management of the rice blast disease. John Wiley and Sons Inc. 2020-02-19 /pmc/articles/PMC7060143/ /pubmed/32072745 http://dx.doi.org/10.1111/mpp.12916 Text en © 2020 The Authors. Molecular Plant Pathology published by British Society for Plant Pathology and John Wiley & Sons Ltd This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle Original Articles
Campos‐Soriano, Lidia
Bundó, Mireia
Bach‐Pages, Marcel
Chiang, Su‐Fen
Chiou, Tzyy‐Jen
San Segundo, Blanca
Phosphate excess increases susceptibility to pathogen infection in rice
title Phosphate excess increases susceptibility to pathogen infection in rice
title_full Phosphate excess increases susceptibility to pathogen infection in rice
title_fullStr Phosphate excess increases susceptibility to pathogen infection in rice
title_full_unstemmed Phosphate excess increases susceptibility to pathogen infection in rice
title_short Phosphate excess increases susceptibility to pathogen infection in rice
title_sort phosphate excess increases susceptibility to pathogen infection in rice
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7060143/
https://www.ncbi.nlm.nih.gov/pubmed/32072745
http://dx.doi.org/10.1111/mpp.12916
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