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Communication Dans Un Congrès Année : 2016

The xyloglucans : are they new elicitors of Arabidopsis thaliana immunity ?

Benoît Poinssot

Résumé

Damaged-Associated Molecular Patterns (DAMPs) are endogenous molecules released from the plant cell wall after wounding by pathogens. DAMPs are recognized by Pattern- Recognition Receptors (PRRs) that play a key role in plant immunity by mediating defense responses. The plant cell wall-derived oligogalacturonides (OG) are well characterized DAMPs that elicit plant immune responses such as MAPK activation, [Ca2+]cyt variations, H2O2 production, defense-related gene expression and enhanced resistance against Botrytis cinerea. Our study focused on a new polysaccharide component of the plant cell wall called xyloglucans (Xh) and compared the immune events triggered by OG and Xh in Arabidopsis thaliana. Our results indicated that Xh can be considered as new elicitors as they induced MAPK activation, the expression of defense-related genes, callose deposition and triggered immunity against Botrytis cinerea. By using a genetic approach, our data indicated that the Xh-triggered immunity against B. cinerea requires the phytoalexin and jasmonic aciddependent pathways.
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Dates et versions

hal-02742597 , version 1 (03-06-2020)

Identifiants

  • HAL Id : hal-02742597 , version 1
  • PRODINRA : 368349

Citer

Justine Claverie, Daphnée Brulé, Xavier Daire, Benoît Poinssot. The xyloglucans : are they new elicitors of Arabidopsis thaliana immunity ?. 5. Journée des Doctorants de l’UMR 1347 Agroécologie, Institut National de la Recherche Agronomique (INRA). FRA., Mar 2016, Dijon, France. 27 p. ⟨hal-02742597⟩
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