Université de Fribourg

Effect of sulfur deficiency on the resistance of oilseed rape to fungal pathogens and expression profiling of the glutathione S-transferase family of "Arabidopsis thaliana"

Dubuis, Pierre-Henri ; Mauch, Felix (Dir.)

Thèse de doctorat : Université de Fribourg, 2004 ; no 1442.

The reduction of S02 atmospheric pollution in the early nineties caused sulfur-deficiency problems in the agriculture of northern Europe. Sulfur is essential for plant development and sulfur containing compounds such as sulfur rich antifungal proteins, phytoalexins and glucosinolates play an important role in plant defense against pathogens. Sulfur starved Brassica napus with no visible symptoms...

Université de Fribourg

Arabidopsis-Phytophthora, un pathosystème modèle pour la caractérisation d'une interaction entre une plante et un pathogène oomycète

Roetschi, Alexandra ; Mauch, Felix (Dir.) ; Gisi, Ulrich (Codir.) ; Métraux, Jean-Pierre (Codir.)

Thèse de doctorat : Université de Fribourg, 2001 ; no 1345.

Oomycetes are pathogens responsible for many plant diseases over the world and the economical impact of their damage is quite important. Although these organisms show a mycelar growth, their biology is quite different from that of fungi. This makes them not easy to fight against and up to now no fungicide is able to stop an epidemy due to Oomycetes in a durable way. The particular biology of...

Université de Fribourg

Molecular analysis of the arabidopsis-Phytophthora pathosystem

Si-Ammour, Azeddine ; Mauch, Felix (Dir.) ; Métraux, Jean-Pierre (Codir.)

Thèse de doctorat : Université de Fribourg, 2002 ; No 1370.

In order to better understand the Phytophthora-plant interaction, we have developed a new pathosystem: Arabidopsis thaliana-Phytophthora porri. At present, the best studied Phytophthora species is P. infestans which caused the dramatic Irish late blight epidemics 150 years ago. Studying the pathosystem Phytophthora infestans-Solanum tuberosum has certain advantages mainly because potato is an...