The Role of ABA in Plant Immunity is Mediated through the PYR1 Receptor
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Otros documentos de la autoría: García-Andrade, Javier; González, Beatriz; Gonzalez-Guzman, Miguel; Rodriguez, Pedro L.; Vera, Pablo
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Título
The Role of ABA in Plant Immunity is Mediated through the PYR1 ReceptorAutoría
Fecha de publicación
2020-08-11Editor
MDPIISSN
1422-0067Cita bibliográfica
GARCÍA-ANDRADE, Javier, et al. El papel de ABA en la inmunidad vegetal está mediado por el receptor PYR1. Revista internacional de ciencias moleculares , 2020, vol. 21, no 16, pág. 5852.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://www.mdpi.com/1422-0067/21/16/5852Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
ABA is involved in plant responses to a broad range of pathogens and exhibits complex antagonistic and synergistic relationships with salicylic acid (SA) and ethylene (ET) signaling pathways, respectively. However, ... [+]
ABA is involved in plant responses to a broad range of pathogens and exhibits complex antagonistic and synergistic relationships with salicylic acid (SA) and ethylene (ET) signaling pathways, respectively. However, the specific receptor of ABA that triggers the positive and negative responses of ABA during immune responses remains unknown. Through a reverse genetic analysis, we identified that PYR1, a member of the family of PYR/PYL/RCAR ABA receptors, is transcriptionally upregulated and specifically perceives ABA during biotic stress, initiating downstream signaling mediated by ABA-activated SnRK2 protein kinases. This exerts a damping effect on SA-mediated signaling, required for resistance to biotrophic pathogens, and simultaneously a positive control over the resistance to necrotrophic pathogens controlled by ET. We demonstrated that PYR1-mediated signaling exerted control on a priori established hormonal cross-talk between SA and ET, thereby redirecting defense outputs. Defects in ABA/PYR1 signaling activated SA biosynthesis and sensitized plants for immune priming by poising SA-responsive genes for enhanced expression. As a trade-off effect, pyr1-mediated activation of the SA pathway blunted ET perception, which is pivotal for the activation of resistance towards fungal necrotrophs. The specific perception of ABA by PYR1 represented a regulatory node, modulating different outcomes in disease resistance. [-]
Publicado en
Int. J. Mol. Sci. 2020, 21(16), 5852Proyecto de investigación
BIO2017-82503-R ; BIO2017-82503-RDerechos de acceso
© 2020 by the authors. Licensee MDPI, Basel, Switzerland
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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