Université de Fribourg

Pathogen and circadian controlled 1 (PCC1) regulates polar lipid content, ABA-related responses, and pathogen defence in Arabidopsis thaliana

Mir, Ricardo ; Hernández, M. Luisa ; Abou-Mansour, Eliane ; Martínez-Rivas, José Manuel ; Mauch, Félix ; Métraux, Jean-Pierre ; León, José

In: Journal of Experimental Botany, 2013, vol. 64, no. 11, p. 3385–3395

Pathogen and Circadian Controlled 1 (PCC1) was previously characterized as a regulator of defence against pathogens and stress-activated transition to flowering. Plants expressing an RNA interference construct for the PCC1 gene (iPCC1 plants) showed a pleiotropic phenotype. They were hypersensitive to abscisic acid (ABA) as shown by reduced germination potential and seedling establishment, as...

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

Gene-specific Involvement of ß-oxidation in wound-activated responses in Arabidopsis

Castillo, M. Cruz ; Martínez, Cristina ; Buchala, Antony ; Métraux, Jean-Pierre ; León, José

In: Plant Physiology, 2004, vol. 135, p. 95-104

The coordinated induced expression of ß-oxidation genes is essential to provide the energy supply for germination and postgerminative development. However, very little is known about other functions of ß-oxidation in nonreserve organs. We have identified a gene-specific pattern of induced ß-oxidation gene expression in wounded leaves of Arabidopsis. Mechanical damage triggered the local and...