Université de Fribourg

The glutaredoxin ATGRXS13 is required to facilitate Botrytis cinerea infection of Arabidopsis thaliana plants

Camera, Sylvain La ; L’Haridon, Floriane ; Astier, Jérémy ; Zander, Mark ; Abou-Mansour, Eliane ; Page, Gonzague ; Thurow, Corinna ; Wendehenne, David ; Gatz, Christiane ; Métraux, Jean-Pierre ; Lamotte, Olivier

In: The Plant Journal, 2011, vol. 68, no. 3, p. 507–519

Botrytis cinerea is a major pre- and post-harvest necrotrophic pathogen with a broad host range that causes substantial crop losses. The plant hormone jasmonic acid (JA) is involved in the basal resistance against this fungus. Despite basal resistance, virulent strains of B. cinerea can cause disease on Arabidopsis thaliana and virulent pathogens can interfere with the metabolism of the host in a...

Université de Fribourg

A permeable cuticle is associated with the release of reactive oxygen species and induction of innate immunity

L'Haridon, Floriane ; Besson-Bard, Angélique ; Binda, Matteo ; Serrano, Mario ; Abou-Mansour, Eliane ; Balet, Francine ; Schoonbeek, Henk-Jan ; Hess, Stephane ; Mir, Ricardo ; León, José ; Lamotte, Olivier ; Métraux, Jean-Pierre

In: PLoS Pathogens, 2011, vol. 7, no. 7, p. e1002148

This study provides an explanation for the strong resistance to B. cinerea observed in wounded plants or plants with cuticular defects. We have observed that a production of ROS and a permeable cuticle is common to all these situations. ROS, that include hydrogen peroxide, are known inducers of resistance and can also act directly against the invading fungus. Degradation of the cuticle by...

Université de Fribourg

Arabidopsis thaliana class-II TGA transcription factors are essential activators of jasmonic acid/ethylene-induced defense responses

Zander, Mark ; Camera, Sylvain La ; Lamotte, Olivier ; Métraux, Jean-Pierre ; Gatz, Christiane

In: The Plant Journal, 2010, vol. 61, no. 2, p. 200 - 210

The three closely related Arabidopsis basic leucine zipper (bZIP) transcription factors TGA2, TGA5 and TGA6 are required for the establishment of the salicylic acid (SA)-dependent plant defense response systemic acquired resistance, which is effective against biotrophic pathogens. Here we show that the same transcription factors are essential for the activation of jasmonic acid (JA)- and ethylene...

Université de Fribourg

Wounding of Arabidopsis leaves causes a powerful but transient protection against Botrytis infection

Chassot, Céline ; Buchala, Antony ; Schoonbeek, Henk-jan ; Métraux, Jean-Pierre ; Lamotte, Olivier

In: The Plant Journal, 2008///doi:10.1111/j.1365-313X.2008.03540.x

Physical injury inflicted on living tissue makes it vulnerable to invasion by pathogens. Wounding of Arabidopsis thaliana leaves, however, does not conform to this concept and leads to immunity to Botrytis cinerea, the causal agent of grey mould. In wounded leaves, hyphal growth was strongly inhibited compared to unwounded controls. Wound-induced resistance was not associated with salicylic...