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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

The PP2C-type phosphatase AP2C1, which negatively regulates MPK4 and MPK6, modulates innate immunity, jasmonic acid, and ethylene levels in Arabidopsis

Schweighofer, Alois ; Kazanaviciute, Vaiva ; Scheikl, Elisabeth ; Teige, Markus ; Doczi, Robert ; Hirt, Heribert ; Schwanninger, Manfred ; Kant, Merijn ; Schuurink, Robert ; Mauch, Felix ; Buchala, Antony ; Cardinale, Francesca ; Meskiene, Irute

In: The Plant Cell, 2007, vol. 19, no. 7, p. 2213-2224

Wound signaling pathways in plants are mediated by mitogen-activated protein kinases (MAPKs) and stress hormones, such as ethylene and jasmonates. In Arabidopsis thaliana, the transmission of wound signals by MAPKs has been the subject of detailed investigations; however, the involvement of specific phosphatases in wound signaling is not known. Here, we show that AP2C1, an...

Université de Fribourg

Induced Systemic Resistance in Arabidopsis thaliana in Response to Root Inoculation with Pseudomonas fluorescens CHA0

Iavicoli, Annalisa ; Boutet, Emmanuel ; Buchala, Antony ; Métraux, Jean-Pierre

In: Molecular Plant-Microbe Interactions, 2003, vol. 16, no. 10, p. 851-858

Root inoculation of Arabidopsis thaliana ecotype Columbia with Pseudomonas fluorescens CHA0r partially protected leaves from the oomycete Peronospora parasitica. The molecular determinants of Pseudomonas fluorescens CHA0r for this induced systemic resistance (ISR) were investigated, using mutants derived from strain CHA0: CHA400 (pyoverdine deficient), CHA805 ...

Université de Fribourg

Genetic evidence that expression of NahG modifies defence pathways independent of salicylic acid biosynthesis in the Arabidopsis–Pseudomonas syringae pv. tomato interaction

Heck, Silvia ; Grau, Theres ; Buchala, Antony ; Métraux, Jean-Pierre ; Nawrath, Christiane

In: The Plant Journal, 2003, vol. 36(3), p. 342

The salicylic acid (SA)-induction deficient (sid) mutants of Arabidopsis, eds5 and sid2 accumulate normal amounts of camalexin after inoculation with Pseudomonas syringae pv. tomato (Pst), while transgenic NahG plants expressing an SA hydroxylase that degrades SA have reduced levels of camalexin and exhibit a higher susceptibility to different...