Université de Neuchâtel

Priming for enhanced defence responses by specific inhibition of the Arabidopsis response to coronatine

Tsai, Chia-Hong ; Singh, Prashant ; Chen, Ching-Wei ; Thomas, Jerome ; Weber, Johann ; Mauch-Mani, Brigitte ; Zimmerli, Laurent

In: The Plant Journal, 2011, vol. 65, no. 3, p. 469-479

The priming agent β-aminobutyric acid (BABA) is known to enhance Arabidopsis resistance to the bacterial pathogen Pseudomonas syringae pv. tomato (Pst) DC3000 by potentiating salicylic acid (SA) defence signalling, notably PR1 expression. The molecular mechanisms underlying this phenomenon remain unknown. A genome-wide microarray analysis of BABA priming during...

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...

Université de Fribourg

Cuticular defects lead to full immunity to a major plant pathogen

Chassot, Céline ; Nawrath, Christiane ; Métraux, Jean-Pierre

In: The Plant Journal, 2007, vol. 49, no. 6, p. 972-980

In addition to its role as a barrier, the cuticle is also a source of signals perceived by invading fungi. Cuticular breakdown products have been shown previously to be potent inducers of cutinase or developmental processes in fungal pathogens. Here the question was addressed as to whether plants themselves can perceive modifications of the cuticle. This was studied using Arabidopsis...