Project description:This SuperSeries is composed of the following subset Series: GSE28549: Anaerobic Oxidation of Benzene by the Hyperthermophilic Archaeon Ferroglobus placidus (Phenol vs. Benzoate) GSE30798: Anaerobic Oxidation of Benzene by the Hyperthermophilic Archaeon Ferroglobus placidus (Benzene vs. Acetate) GSE30799: Anaerobic Oxidation of Benzene by the Hyperthermophilic Archaeon Ferroglobus placidus (Benzene vs. Phenol) GSE30801: Anaerobic Oxidation of Benzene by the Hyperthermophilic Archaeon Ferroglobus placidus (Benzene vs. Benzoate) Refer to individual Series
Project description:Pyrococcus yayanosii CH1 is the first and only obligate piezophilic hyperthermophilic microorganism discovered so far, that extends the physical and chemical limits of life on Earth and strengthens the idea of the existence of a hyperthermophilic biosphere in the depth of our planet. It was isolated from the Ashadze hydrothermal vent at 4,100 m depth. Multi-omics analyses where performed in order to study the mechanisms implemented by the cell to face high hydrostatic pressure variations. In silico analyses showed that P. yayanosii genome is highly adapted to its harsh environment with precisely a loss of aromatic amino acid biosynthesis and the high constitutive expression of the energy metabolism compared to others non obligate piezophilic Pyrococus. Differential proteomics and transcriptomics analyses identified key hydrostatic pressure responsive genes involved in translation, chemotaxis, energy metabolism (hydrogenases and formate metabolism) and CRISPR-cas.
Project description:Pyrococcus yayanosii CH1 is the first and only obligate piezophilic hyperthermophilic microorganism discovered so far, that extends the physical and chemical limits of life on Earth and strengthens the idea of the existence of a hyperthermophilic biosphere in the depth of our planet. It was isolated from the Ashadze hydrothermal vent at 4,100 m depth. Multi-omics analyses where performed in order to study the mechanisms implemented by the cell to face high hydrostatic pressure variations. In silico analyses showed that P. yayanosii genome is highly adapted to its harsh environment with precisely a loss of aromatic amino acid biosynthesis and the high constitutive expression of the energy metabolism compared to others non obligate piezophilic Pyrococus. Differential proteomics and transcriptomics analyses identified key hydrostatic pressure responsive genes involved in translation, chemotaxis, energy metabolism (hydrogenases and formate metabolism) and CRISPR-cas. Cells were grown at different hydrostatic pressures (20, 52 and 80 Mpa for P. yayanosii and 0.1 and 45 Mpa for P. furiosus) until they reached the middle of the exponential phase. Each culture was done 3 times independantly.
Project description:Comparative transcriptome analysis of early interaction events in Scots pine root tissues following challenge with a pathogenic, saprophytic or symbiotic fungus. Seedlings of P. sylvestris (19 days post germination) were transferred to wet, sterile filter paper on Petri-plates. Thereafter, the roots of the seedlings were inoculated with the mycelial homogenate of either Heterobasidion annosum (FP5, P-type) a pathogenic root rot fungus which attacks Norway spruce, Scots pine and broad leaf trees or Laccaria bicolor, an obligate ectomycorrhizal symbiont or Trichoderma aureoviride- an obligate saprotroph. Thereafter, incubated for 30 minutes, during which time some hyphae adhered to the roots. The inoculated seedlings (ten) were then transferred to another wet sterile filter paper placed on 1% water agar in Petri dishes. A second set of moist sterile filter paper was laid over the roots. The region of the Petri-dish containing the roots was covered with aluminium foil and the edges of the plate sealed with parafilm. The seedlings were then incubated for 24 hr under a photoperiod of 16h light at 20 ºC. Control seedlings were âinoculatedâ with sterile distilled water.
