GPL2708[RGSE] - GEO DataSets

Select item 2000071261.

Transcriptome analysis of the phytopathogen Xylella fastidiosa in response to salt and osmotic stress

(Submitter supplied) The global transcriptional response of the phytopathogenic bacterium X. fastidiosa to a sudden increase in salinity and osmolarity of the medium was investigated using DNA microarrays. Time-course experiments were carried out by exposing bacterial cells to high salinity (250 mM NaCl) and high osmolarity (300 mM sucrose) conditions revealing 142 upregulated genes under both stresses, including pathogenicity related genes, genes encoding transcriptional regulators, as well as genes related to DNA metabolism and mobile genetic elements. more...

Organism:: Xylella fastidiosa

Type:: Expression profiling by array

Platform:: GPL2708
48 Samples

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Series

Accession:: GSE7126

ID:: 200007126

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Select item 2000216472.

Global gene expression under nitrogen starvation in Xylella fastidiosa: contribution of the σ54 regulon

(Submitter supplied) Background: Xylella fastidiosa, a Gram-negative fastidious bacterium, grows exclusively in the xylem of several plants, causing diseases such as citrus variegated chlorosis. As the xylem sap contains low concentrations of amino acids and other compounds, X. fastidiosa needs to cope with nitrogen limitation in its natural habitat. Results: In this work, we performed a whole-genome microarray analysis of the X. more...

Organism:: Xylella fastidiosa

Type:: Expression profiling by array

Platform:: GPL2708
24 Samples

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Series

Accession:: GSE21647

ID:: 200021647

PubMed Full text in PMC Similar studies Analyze with GEO2R

Select item 2000080973.

Role of σ54 in the regulation of genes involved in biogenesis of type I and type IV pili in Xylella fastidiosa

(Submitter supplied) The phytopathogen Xylella fastidiosa produces two classes of pili, long type IV pili and short type I pili, which are involved in motility and adhesion. In this work, we have investigated the role of σ54 factor and its involvement in the regulation of fimbrial biogenesis in X. fastidiosa. An rpoN null mutant was constructed from citrus strain J1a12, and analyses of global gene expression profile by microarrays comparing the wild type and rpoN mutant strains showed that few genes exhibited differential expression. more...

Organism:: Xylella fastidiosa

Type:: Expression profiling by array

Platform:: GPL2708
6 Samples

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Series

Accession:: GSE8097

ID:: 200008097

Select item 2000058884.

Global gene expression analysis of the phytopathogen Xylella fastidiosa at low iron availability

(Submitter supplied) Xylella fastidiosa is the etiologic agent of a wide range of plant diseases including citrus variegated chlorosis (CVC), a major threat to the Brazilian citrus industry. Genome sequences of several strains of this phytopathogen are accessible, enabling large-scale functional studies. Transcript levels in different iron availabilities were assessed with DNA microarrays representing 2608 (91.6%) coding sequences (CDS) of X. more...

Organism:: Xylella fastidiosa

Type:: Expression profiling by array

Platform:: GPL2708
22 Samples

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Series

Accession:: GSE5888

ID:: 200005888

PubMed Full text in PMC Similar studies Analyze with GEO2R

Select item 2000058865.

Global gene expression analysis of the phytopathogen Xylella fastidiosa at high iron availability

Organism:: Xylella fastidiosa

Type:: Expression profiling by array

Platform:: GPL2708
22 Samples

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Series

Accession:: GSE5886

ID:: 200005886

PubMed Full text in PMC Similar studies Analyze with GEO2R

Select item 2000049606.

The single ECF sigma factor of Xylella fastidiosa is involved in the heat shock response

(Submitter supplied) Genome sequence analysis of the bacterium Xylella fastidiosa revealed the presence of two genes, named rpoE and rseA, predicted to encode an ECF sigma factor and an anti-sigma factor, respectively. In this work, an rpoE null mutant was constructed in the citrus strain J1a12 and shown to be sensitive to exposure to heat shock and ethanol. To identify the X. fastidiosa σE regulon, global gene expression profiles were obtained by DNA microarray analysis of bacterial cells under heat shock identifying 23 sigmaE-dependent genes. more...

Organism:: Xylella fastidiosa

Type:: Expression profiling by array

Platform:: GPL2708
18 Samples

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Series

Accession:: GSE4960

ID:: 200004960

PubMed Full text in PMC Similar studies Analyze with GEO2R

Select item 2000041617.

Global gene expression analysis of the heat shock response in the phytopathogen Xylella fastidiosa

(Submitter supplied) Xylella fastidiosa is a phytopathogenic bacterium responsible for diseases in many economically important crops. Although different strains have been studied, little is known about X. fastidiosa stress responses. One of the best characterized stresses in bacteria is the heat shock response, which induces the expression of specific genes to prevent protein misfolding and aggregation, and to promote degradation of the irreversibly denatured polypeptides. more...

Organism:: Xylella fastidiosa

Type:: Expression profiling by array

Platforms:: GPL3409 GPL2708
52 Samples

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Series

Accession:: GSE4161

ID:: 200004161

PubMed Full text in PMC Similar studies Analyze with GEO2R

Select item 2000030448.

Heat Shock response of the phytopathogenic bacteria Xylella fastidiosa

(Submitter supplied) This is the study of the Heat Shock response of phytopathogenic bacteria Xylella fastidiosa. This series keeps the 25 minutes 40oC stimulus response (Aug 2005). Keywords: stress response; heat shock response

Organism:: Xylella fastidiosa

Type:: Expression profiling by array

Platform:: GPL2708
15 Samples

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Series

Accession:: GSE3044

ID:: 200003044

PubMed Full text in PMC Similar studies Analyze with GEO2R

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