Genome-wide expression profiling Arabidopsis thaliana at the stage of Golovinomyces cichoracearum haustorium formation

FABRO G; DI RIENZO J; VOIGT C; SAVCHENKO T; DEHESH K; SOMERVILLE S; ALVAREZ ME

AMER SOC PLANT BIOLOGISTS

Lugar: Rockville; Año: 2008 vol. 146 p. 1421 - 1421

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