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PRR2, a pseudo-response regulator, promotes salicylic acid and camalexin accumulation during plant immunity.
Cheval, C; Perez, M; Leba, L J; Ranty, B; Perochon, A; Reichelt, M; Mithöfer, A; Robe, E; Mazars, C; Galaud, J P; Aldon, D.
Afiliación
  • Cheval C; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France.
  • Perez M; John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK.
  • Leba LJ; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France.
  • Ranty B; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France.
  • Perochon A; UMR QualiSud, Université de Guyane, Campus Universitaire de Troubiran, P.O. Box 792, 97337, Cayenne Cedex, French Guiana, France.
  • Reichelt M; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France.
  • Mithöfer A; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France.
  • Robe E; University College Dublin Earth Institute and School of Biology and Environmental Science, College of Science, University College Dublin, Belfield, Dublin, Ireland.
  • Mazars C; Department of Biochemistry, Max Planck Institute for Chemical Ecology, Hans Knöll Strasse 8, 07745, Jena, Germany.
  • Galaud JP; Department of Bioorganic Chemistry, Max Planck Institute for Chemical Ecology, Hans Knöll Strasse 8, 07745, Jena, Germany.
  • Aldon D; Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France.
Sci Rep ; 7(1): 6979, 2017 08 01.
Article en En | MEDLINE | ID: mdl-28765536
Calcium signalling mediated by Calmodulin (CaM) and calmodulin-like (CML) proteins is critical to plant immunity. CaM and CML regulate a wide range of target proteins and cellular responses. While many CaM-binding proteins have been identified, few have been characterized for their specific role in plant immunity. Here, we report new data on the biological function of a CML-interacting partner, PRR2 (PSEUDO-RESPONSE REGULATOR 2), a plant specific transcription factor. Until now, the physiological relevance of PRR2 remained largely unknown. Using a reverse genetic strategy in A. thaliana, we identified PRR2 as a positive regulator of plant immunity. We propose that PRR2 contributes to salicylic acid (SA)-dependent responses when challenged with the phytopathogenic bacterium Pseudomonas syringae. PRR2 is transcriptionally upregulated by SA and P. syringae, enhances SA biosynthesis and SA signalling responses; e.g. in response to P. syringae, PRR2 induces the production of SA and the accumulation of the defence-related protein PR1. Moreover, PRR2 overexpressing lines exhibit an enhanced production of camalexin, a phytoalexin that confers enhanced resistance against pathogens. Together, these data reveal the importance of PRR2 in plant immune responses against P. syringae and suggest a novel function for this particular plant specific transcription factor in plant physiology.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tiazoles / Proteínas Portadoras / Arabidopsis / Ácido Salicílico / Proteínas de Arabidopsis / Resistencia a la Enfermedad / Indoles Tipo de estudio: Prognostic_studies Idioma: En Revista: Sci Rep Año: 2017 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Reino Unido

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tiazoles / Proteínas Portadoras / Arabidopsis / Ácido Salicílico / Proteínas de Arabidopsis / Resistencia a la Enfermedad / Indoles Tipo de estudio: Prognostic_studies Idioma: En Revista: Sci Rep Año: 2017 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Reino Unido