GEO DataSets

(Submitter supplied) Two excessive NaCl concentrations (0.25% and 1.5%) and two periods of treatment (7 min and 45 min) were used as moderate- and high-salt sress conditions at early and later stages of response, respectively. As a baseline, samples from cells grown on a standard SIS medium in the same growing system and same illumination were used. Keywords: time course and dose response

Organism:

Cereibacter sphaeroides 2.4.1

Type:

Expression profiling by array

Platform:

GPL162

15 Samples

Download data: CEL

(Submitter supplied) Transcriptome profiling of Rhodobacter sphaeroides cells (WT and delta-oxyR mutant) grown in semiaerobic conditions, 7 and 30 min after addition of H2O2 up to 1 mM Keywords: time series

Organism:

Cereibacter sphaeroides; Cereibacter sphaeroides 2.4.1

Type:

Expression profiling by array

Dataset:

GDS1908

Platform:

GPL162

15 Samples

Download data

Expression profiling of oxyR deletion mutant and wild type cells following treatment with 1 mM hydrogen peroxide. OxyR is a transcription factor that senses oxidative stress. Results provide insight into the mechanisms involved in oxidative stress tolerance.

Organism:

Rhodobacter sphaeroides; Rhodobacter sphaeroides 2.4.1

Type:

Expression profiling by array, count, 2 genotype/variation, 3 time sets

Platform:

GPL162

Series:

GSE2829

15 Samples

Download data

(Submitter supplied) The alkaliphilic halotolerant bacterium Bacillus sp. N16-5 often faces salt stress in its natural habitats. One-color microarrays was used to investigate transcriptome expression profiles of Bacillus sp. N16-5 adaptation reactions to prolonged grown at different salinities (0%, 2%, 8% and 15% NaCl) and the initial reaction to suddenly alter salinity from 0% to 8% NaCl.

Organism:

Bacillus sp. N16-5

Type:

Expression profiling by array

Platform:

GPL15620

27 Samples

Download data: TXT

(Submitter supplied) Global transcriptome analyses at different stages of growth were applied to monitor growth phase-dependent gene expression in the alpha-proteobacterium Rhodobacter sphaeroides. Cultures with low aeration, which underwent strong changes in levels of dissolved oxygen during growth, were compared to aerated cultures, which showed little variation in levels of dissolved oxygen. Cells were in stationary phase for 12 h or for 57 h before dilution into fresh medium. more...

Organism:

Cereibacter sphaeroides 2.4.1

Type:

Expression profiling by high throughput sequencing

Platform:

GPL17213

8 Samples

Download data: WIG

(Submitter supplied) Halotolerant species are of interest since they occur naturally in environments with excess toxic ions. The cyanobacterium Halothece sp. PCC 7418 (hereafter referred to as Halothece) exhibits remarkable halotolerance and was used to examine stress-responsive regulatory mechanisms. The effects of sa;t-down shock on Halothece transcriptomes were examined using RNA sequencing.

Organism:

Halothece sp. PCC 7418

Type:

Expression profiling by high throughput sequencing

Platform:

GPL32361

2 Samples

Download data: XLSX

(Submitter supplied) Halotolerant species are of interest since they occur naturally in environments with excess toxic ions. The cyanobacterium Halothece sp. PCC 7418 (hereafter referred to as Halothece) exhibits remarkable halotolerance and was used to examine stress-responsive regulatory mechanisms. The effects of five different stimuli on Halothece transcriptomes were examined using RNA sequencing. In response to diverse stresses, there were both common and stress-specific transcriptional responses.

Organism:

Halothece sp. PCC 7418

Type:

Expression profiling by high throughput sequencing

Platform:

GPL32361

7 Samples

Download data: TXT

(Submitter supplied) DNA microarray analysis was employed to investigate the transcriptome response to nitrosative stress in a non-denitrifying facultative photosynthetic bacterium Rhodobacter sphaeroides 2.4.1. We focused on the role played by a nitric oxide-response transcriptional regulator NnrR in the response. The transcriptome profiles of R. sphaeroides 2.4.1 and its nnrR mutant before and after exposure to nitrosating agents S-nitrosoglutathione (GSNO) or sodium nitroprusside (SNP) under semiaerobic conditions were analyzed.

Organism:

Cereibacter sphaeroides 2.4.1

Type:

Expression profiling by array

Platform:

GPL162

12 Samples

Download data: CEL

(Submitter supplied) S. aureus has the propensity to survive a range of NaCl challenge conditions We used commercially available Affymetrix S. aureus GeneChips (part number 900514) to compare the gene expression properties of wild type cells during growth at no or high (2M) NaCl.

Organism:

Staphylococcus aureus; Staphylococcus aureus subsp. aureus USA300

Type:

Expression profiling by array

Platform:

GPL1339

4 Samples

Download data: CEL, CHP

(Submitter supplied) BACKGROUND: With the aim of remaining viable, bacteria must deal with changes in environmental conditions, including increases in external osmolarity. While studies concerning bacterial response to this stress condition have focused on soil, marine and enteric species, this report is about Caulobacter crescentus, a species inhabiting freshwater oligotrophic habitats. RESULTS: A genomic analysis reported in this study shows that most of the classical genes known to be involved in intracellular solute accumulation under osmotic adaptation are missing in C. more...

Organism:

Caulobacter vibrioides CB15; Caulobacter vibrioides NA1000

Type:

Expression profiling by array

Platform:

GPL14163

9 Samples

Download data: TXT

(Submitter supplied) Spingomonas wittichii strain RW1 can completely oxidize dibenzo-p-dioxins and dibenzofurans, which are persistent contaminants of soils and sediments. For successful application in soil bioremediation systems, strain RW1 must cope with fluctuations in water availability, or water potential. The objectives of this study were to characterize how strain RW1 responses to changes in different components of the total water potential (solute and matric potential) and to then connect these responses to more realistic scenarios of soil desiccation. more...

Organism:

Rhizorhabdus wittichii RW1

Type:

Expression profiling by array

Platform:

GPL11581

25 Samples

Download data: TXT

(Submitter supplied) In many habitats, microorganisms are exposed to high or fluctuating salinities and evolved specific acclimation strategies to thrive in those environments. Euryhaline microorganisms can grow in a broad range of salinities, from low ionic strength like freshwater up to twofold seawater salinities. Here, we analyzed the salt acclimation process of the euryhaline model cyanobacterium Synechocystis sp. PCC 6803 in a multi-omics approach by combining transcriptomic, proteomic and metabolomic analyses. The Overall, the comparison of salt-induced proteome and transcriptome changes revealed a good correleation between the proteome and transcriptome that as most the majority of stably up-regulated proteins also showed elevated mRNA transcript levels. However, a dynamic reorganization of the transcriptome occurred during the first hours after salt shock, which probably also involves the action of small regulatory RNAs acting at the post-transcriptional level. In addition to the rapid and stable steady upregulation of compatible solute biochemistry, a dynamic reorganization of the transcriptome occurred during the first hours after salt shock, which probably involves the action of small regulatory RNAs. Moreover, the coordinated induction of several stress proteins known to be involved in iron and oxidative stress responses as well as of mechano-sensitive channels was observed. Based on these data, an extended salt stimulon can be defined comprising many proteins directly or indirectly related to compatible solute metabolism, ion and water movements as well as a defined set of small regulatory RNAs. Moreover, the massive accumulation of the compatible solute glucosylglycerol had large impact on the overall carbon and nitrogen metabolism. Our comprehensive data set provides the basis for future attempts to engineer cyanobacterial salt tolerance and to search for processes regulating this important environmental acclimation process.

Organism:

Synechocystis sp. PCC 6803

Type:

Expression profiling by array

Platform:

GPL15867

8 Samples

Download data: TXT