Project description:Transcriptional corepressors of the Topless family are important regulators of plant hormone and immunity signaling. We present here the transcriptome of Arabidopsis thaliana Col-0 plants expressing GFP-tagged TPR1 (Topless-related 1). Expression of TPR1 driven by its own promoter (pTPR1:TPR1-GFP) in Arabidopsis results in EDS1-dependent defense activation and dwarfed growth affected by the plant immune regulator EDS1 but not by accumulation of salicylic acid. We used total RNA sequencing to characterize the transcriptional status of TPR1-GFP expressing lines in Col, eds1-2 and sid2-1 mutant backgrounds.
Project description:Perception of microbe-associated molecular patterns by host cell-surface pattern recognition receptors triggers a series of immune responses such as activation of mitogen-activated protein kinase (MAPK) cascades. In Arabidopsis thaliana, the receptor-like cytoplasmic kinase PBL27 interacts with the chitin receptor CERK1 and regulates chitin-induced MAPK activation. We found that the MAPK kinase kinase MAPKKK5 connects PBL27 to the downstream MAPK Kinases (MKK4/5) and MAPKs (MPK3/6). RNA-seq analysis using the mapkkk5 mutant indicated that MAPKKK5 plays important roles in chitin-induced transcriptional reprogramming. As far as we are aware, this is the first report pointing to the significance of a complete MAPK cascade in defense-associated transcriptional reprogramming in plants.
Project description:Plant Topless (TPL) and Topless-related (TPR) corepressors are important regulators of plant hormone and immunity signaling. We present here the transcriptome of tpr1 and tpr1 tpl tpr4 triple mutant lines (t3) during TNL-triggered immunity in Arabidopsis thaliana after infection with Pst avrRps4 (OD 0.005). Col-0 and eds1-2 were analysed as controls.
Project description:Plant Topless-related 1 (TPR1), belonging to a family of transcriptional corepressors found across eukaryotes, contributes to immunity signaling in Arabidopsis thaliana and wild tobacco. We used chromatin immunoprecipitation and sequencing (ChIP-seq) of Arabidopsis TPR1-GFP expressing transgenic lines to characterize genome-wide TPR1-chromatin associations.
