title: The effect of the bacterial effector protein harpin on transcriptional profile and mitochondrial proteins of Arabidopsis thaliana.
abstract: Here we report on the effect of the bacterial elicitor harpin from Pseudomonas syringae on Arabidopsis thaliana with an emphasis on transcriptional profiling and on changes of the mitochondrial proteome. Interestingly, of the currently about 400 identified mitochondrial proteins, transcriptional profiling by genome-wide DNA-microarray analyses revealed a total of 192 genes that showed significant changes in transcript abundance in response to the bacterial elicitor. The most dramatic changes were observed for the mitochondrial protein import apparatus of which 70% of all genes were induced. Proteomic analyses by 2D-PAGE and MALDI-TOF Mass Spectrometry for peptide fingerprint analysis confirmed the corresponding changes within the mitochondrial proteome in 28 cases. Strikingly, we found an accumulation of virtually all members of the TCA cycle. In sum, our results point to an involvement of mitochondria in the response of plant cells to the harpin elicitor, which becomes apparent both at the transcriptomic as well as proteomic level.
authors.affiliation: Institute of Biochemical Plant Pathology, Helmholtz Zentrum München-German Research Center for Environmental Health, D-85764 Munich/Neuherberg, Germany.
authors.forename: Maren
authors.initials: M
authors.lastname: Livaja
authors.forename: M Cristina
authors.initials: MC
authors.lastname: Palmieri
authors.forename: Uta
authors.initials: U
authors.lastname: von Rad
authors.forename: Jörg
authors.initials: J
authors.lastname: Durner
mesh_terms: D017360:Arabidopsis / Q000235:genetics* / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000235:genetics* / Q000378:metabolism; D001425:Bacterial Outer Membrane Proteins / Q000235:genetics* / Q000494:pharmacology; D018744:DNA, Plant / Q000235:genetics; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D024101:Mitochondrial Proteins / Q000235:genetics* / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis; D010084:Oxidation-Reduction; D010766:Phosphorylation; D020543:Proteome; D040901:Proteomics; D044224:Pseudomonas syringae / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism; D014158:Transcription, Genetic / Q000187:drug effects
chemical_list: D029681:Arabidopsis Proteins; D001425:Bacterial Outer Membrane Proteins; D018744:DNA, Plant; D024101:Mitochondrial Proteins; D020543:Proteome; D017382:Reactive Oxygen Species; C075462:harpin protein, Erwinia amylovora