Genome-Wide Expression Profiling Arabidopsis at the Stage of Golovinomyces cichoracearum Haustorium Formation

GEORGINA FABRO; JULIO A. DI RIENZO; CHRISTIAN A. VOIGT; TATYANA SAVCHENKO; KATAYOON DEHESH; SHAUNA SOMERVILLE; MARIA ELENA ALVAREZ

AMER SOC PLANT BIOLOGISTS

Lugar: Washington DC, USA; Año: 2008 vol. 146 p. 1421 - 1421

ompatibility between plants and obligate biotrophic fungi requires fungal mechanisms for efficiently obtaining nutrients andcounteracting plant defenses under conditions that are expected to induce changes in the host transcriptome. A key step in theproliferation of biotrophic fungi is haustorium differentiation. Here we analyzed global gene expression patterns in Arabidopsisthaliana leaves during the formation of haustoria by Golovinomyces cichoracearum. At this time, the endogenous levels of salicylicacid (SA) and jasmonic acid (JA) were found to be enhanced. The responses of wild-type, npr1-1, and jar1-1 plants were used tocategorize the sensitivity of gene expression changes to NPR1 and JAR1, which are components of the SA and JA signalingpathways, respectively. We found that the infection process was the major source of variation, with 70 genes identified ashaving similarly altered expression patterns regardless of plant genotype. In addition, principal component analysis (PCA)id