Project description:Whole genome gene expression study comparing Pseudomonas fluorescens Pf0-1 (Wt) relative to a delta-pst mutant (deletion of the pstSCAB operon) that consitutively expresses the Pho regulon Mutants used in this study are further described in Monds, R.D. Newell, P.D., Gross, R.H., O'Toole, G.A. (2007) Phosphate-dependent modulation of c-di-GMP levels regulates Pseudomonas fluorescens Pf0-1 biofilm formation by controlling secretion of the adhesin LapA. Mol. Microbiol. 63(3): 656-679 A four chip study using total RNA recovered from two independent wild-type cultures of wild type strain Pseudomonas fluorescens Pf0-1 and two independent cultures of Pseudomonas fluorescens Pf0-1 delta pst mutant (deletion of the pstSCAB operon). Each chip measures the expression level of 5733 open reading frames (ORFs) genes from Pseudomonas fluorescens Pf0-1 (Refseq: NC_007492) with twenty 60-mer postive match (PM) probes per gene, with three-fold technical redundancy.
Project description:DNA microarray technology was used to survey changes in gene expression in P. fluorescens after mitomycin C (MMC) treatment. As expected, genes associated with the SOS response were upregulated. These include genes coding the recombination involved protein RecA, DNA repair protein RecN, excinuclease ABC subunit A UvrA, and the LexA repressor protein. The expression profile was similar to that which had been shown for E. coli after MMC treatment. Interestingly, expression of 33 bacteriophage-like genes was upregulated two hours after MMC treatment. Those genes are clustered in the chromosome. This result suggests that MMC may induce a prophage resident in the P. fluorescens genome. However, no phage particles were detected in a preparation of P. fluorescens strain DC454 that had been treated with MMC using transmission electron microscopy, and the same preparation failed to produce phage plaques on lawns of any of 10 different Pseudomonas strains tested, suggesting that the 33 bacteriophage-like gene cluster represents a defective prophage. Keywords: time course, stress response
Project description:Whole genome gene expression study comparing Pseudomonas fluorescens Pf0-1 (Wt) relative to a delta-pst mutant (deletion of the pstSCAB operon) that consitutively expresses the Pho regulon Mutants used in this study are further described in Monds, R.D. Newell, P.D., Gross, R.H., O'Toole, G.A. (2007) Phosphate-dependent modulation of c-di-GMP levels regulates Pseudomonas fluorescens Pf0-1 biofilm formation by controlling secretion of the adhesin LapA. Mol. Microbiol. 63(3): 656-679
Project description:This SuperSeries is composed of the following subset Series: GSE29319: Iron-starvation effect on transcriptome of Pseudomonas fluorescens Pf-5: iron(II) chloride GSE29320: Iron-starvation effect on transcriptome of Pseudomonas fluorescens Pf-5: iron(III) chloride Refer to individual Series
Project description:This SuperSeries is composed of the following subset Series: GSE33907: Tannic acid (20 µg/ mL) treatment effect on transcriptome of Pseudomonas fluorescens Pf-5 GSE33908: Tannic acid (160 µg/ mL) treatment effect on transcriptome of Pseudomonas fluorescens Pf-5 Refer to individual Series
Project description:ra13-03_pyo - effect of pseudomonas fluorescens pyoverdine on a.thaliana defence responses and iron homeostasis - Analyse de l’effet d’un traitement par la pyoverdine sur les gènes liés à l’homéostasie du fer et à l’induction des réactions de défense. - Arabidopsis thaliana plants cultivated in hydroponic conditions were treated for 3 days by pyoverdin, a bacteriosiderophore from Pseudomonas fluorescens C7R12 in a medium supplemented or deprived of iron.
