Artículo
OXR2 increases plant defense against a hemibiotrophic pathogen via the salicylic acid pathway
Mencia, Regina
; Céccoli, Gabriel
; Fabro, Georgina
; Torti, Pablo
; Colombatti, Francisco
; Ludwig Müller, Jutta; Alvarez, Maria Elena
; Welchen, Elina
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Fecha de publicación:
07/2020
Editorial:
American Society of Plant Biologist
Revista:
Plant Physiology
ISSN:
0032-0889
e-ISSN:
1532-2548
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Arabidopsis (Arabidopsis thaliana) OXIDATION RESISTANCE2 (AtOXR2) is a mitochondrial protein belonging to the Oxidation Resistance (OXR) protein family, recently described in plants. We analyzed the impact of AtOXR2 in Arabidopsis defense mechanisms against the hemibiotrophic bacterial pathogen Pseudomonas syringae. oxr2 mutant plants are more susceptible to infection by the pathogen and, conversely, plants overexpressing AtOXR2 (oeOXR2 plants) show enhanced disease resistance. Resistance in these plants is accompanied by higher expression of WRKY transcription factors, induction of genes involved in salicylic acid (SA) synthesis, accumulation of free SA, and overall activation of the SA signaling pathway. Accordingly, defense phenotypes are dependent on SA synthesis and SA perception pathways, since they are lost in isochorismate synthase1/salicylic acid induction deficient2 and nonexpressor of pathogenesis-related genes1 (npr1) mutant backgrounds. Overexpression of AtOXR2 leads to faster and stronger oxidative burst in response to the bacterial flagellin peptide flg22. Moreover, AtOXR2 affects the nuclear localization of the transcriptional coactivator NPR1, a master regulator of SA signaling. oeOXR2 plants have increased levels of total glutathione and a more oxidized cytosolic redox cellular environment under normal growth conditions. Therefore, AtOXR2 contributes to establishing plant protection against infection by P. syringae acting on the activity of the SA pathway.
Palabras clave:
OXR FAMILY
,
PSEUDOMONAS SYRINGAE
,
OXIDATIVE STRESS
,
PLANT DEFENSES
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Identificadores
Colecciones
Articulos(CCT - SANTA FE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Articulos(CIQUIBIC)
Articulos de CENTRO DE INVEST.EN QCA.BIOL.DE CORDOBA (P)
Articulos de CENTRO DE INVEST.EN QCA.BIOL.DE CORDOBA (P)
Articulos(IAL)
Articulos de INSTITUTO DE AGROBIOTECNOLOGIA DEL LITORAL
Articulos de INSTITUTO DE AGROBIOTECNOLOGIA DEL LITORAL
Citación
Mencia, Regina; Céccoli, Gabriel; Fabro, Georgina; Torti, Pablo; Colombatti, Francisco; et al.; OXR2 increases plant defense against a hemibiotrophic pathogen via the salicylic acid pathway; American Society of Plant Biologist; Plant Physiology; 184; 2; 7-2020; 1112-1127
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