GEO DataSets

(Submitter supplied) A 4608-spot DNA microarray was printed containing unique internal fragments of 2692 CDS representing 94.5% of all of the 2848 CDS annotated by Simpson et al. (2000, Nature) (http://aeg.lbi.ic.unicamp.br/xf). PCR primers were designed to amplify unique internal fragments of 200-1000 bp of each predicted CDS described in the annotated genome sequence of X. fastidiosa strain 9a5c (http://aeg.lbi.ic.unicamp.br/xf). more...

Organism:

Xylella fastidiosa

8 Series

178 Samples

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(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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(Submitter supplied) A 4608-spot DNA microarray was printed containing unique internal fragments of 2572 CDS representing 90.3% of all of the 2848 CDS annotated by Simpson et al. (2000, Nature) (http://aeg.lbi.ic.unicamp.br/xf). PCR primers were designed to amplify unique internal fragments of 200-1000 bp of each predicted CDS described in the annotated genome sequence of X. fastidiosa strain 9a5c (http://aeg.lbi.ic.unicamp.br/xf). more...

Organism:

Xylella fastidiosa

1 Series

8 Samples

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(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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(Submitter supplied) With the aid of a biochip, carrying representative sequences from approximately 2200 sequences from the genome of isolate 9a5c from X. fastidiosa (Xf), microarray-based comparisons have been performed with 6 different Xf isolates obtained from citrus plants (Table 1). Four of these isolates (56a, 9.12c, 187b, and 36f) were obtained from CVC-affected trees and are representatives of the most prevalent Xf haplotypes found in sweet orange orchards across the state of São Paulo, while isolate CV21 was obtained from a non-symptomatic tree from the same region. more...

Organism:

Xylella fastidiosa

Type:

Genome variation profiling by array

Platform:

GPL4683

24 Samples

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(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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(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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(Submitter supplied) To investigate the role(s) of a cold shock protein homolog (Csp1) in plant pathogenic bacteria Xylella fastidiosa, we compared transcriptome profiles between wild type and a csp1 deletion mutant (Δcsp1) using long read Nanopore RNA sequencing.

Organism:

Xylella fastidiosa subsp. fastidiosa

Type:

Expression profiling by high throughput sequencing

Platform:

GPL30664

11 Samples

Download data: TXT

(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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(Submitter supplied) Xylella fastidiosa regulates traits important to both virulence of grape as well as colonization of sharpshooter vectors via its production of a fatty acid signal molecule known as DSF whose production is dependent on rpfF. While X. fastidiosa rpfF mutants exhibit increased virulence to plants they are unable to be spread from plant to plant by insect vectors. To gain more insight into the traits that contribute to these processes, a DNA microarray for this species was designed and utilized to determine the RpfF-dependent regulon by transcriptional profiling. more...

Organism:

Xylella fastidiosa 9a5c; Xylella fastidiosa Temecula1; Xylella fastidiosa

Type:

Expression profiling by array

Platform:

GPL15652

1 Sample

Download data: TXT

(Submitter supplied) With the aid of a biochip, carrying representative sequences from approximately 2200 sequences from the genome of isolate 9a5c from X. fastidiosa (Xf), microarray-based comparisons have been performed with 8 different Xf isolates obtained from coffee plants.

Organism:

Xylella fastidiosa

Type:

Genome variation profiling by array

Platform:

GPL4683

32 Samples

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(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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(Submitter supplied) Xyllela fastidiosa (Xf) is a xylem-limited bacterium responsible for important plant diseases, such as citrus variegated chlorosis (CVC) in Brazil and grapevines Pierce´s disease in the USA. One intriguing aspect of this microorganism is its capacity to grow in an extremely harsh environment such as the xylem, mainly composed of water, minerals and few organic salts. In vitro growth of Xf cells in chemically-defined media that mimic xylem fluid has been recently achieved, allowing more detailed studies of metabolic processes used by xylem-dwelling bacteria to thrive in such a nutrient-poor environment. more...

Organism:

Xylella fastidiosa; Xylella fastidiosa 9a5c

Type:

Expression profiling by array

Platform:

GPL4683

8 Samples

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(Submitter supplied) In the xylem vessels of susceptible hosts, such as citrus trees or grapevines, Xylella fastidiosa forms biofilm like-colonies that can block water transport, which appears to correlate to disease symptoms. Besides helping host colonization, bacterial biofilms play an important role in resistance against antimicrobial agents, for instance antimicrobial peptides (AMP). Here we show that gomesin, a potent AMP from a Brazilian tarantula spider, modulates X. more...

Organism:

Xylella fastidiosa

Type:

Expression profiling by array

Platform:

GPL9024

20 Samples

Download data: TXT

(Submitter supplied) Investigation of whole genome gene expression level changes in Xylella fastidiosa grown in minimal media XFM and XFM supplied with pectin or glucan (Host polysaccharides) , compared to cell grown in the complex media PWG. The cells grown in the minimal medium XFM supplied with host polysaccharides specially pectin are transmissible by the insect vector when delivered to the vector through artificial diet system. more...

Organism:

Xylella fastidiosa; Xylella fastidiosa Temecula1

Type:

Expression profiling by array

Platform:

GPL9337

16 Samples

Download data: CALLS, PAIR

(Submitter supplied) Investigation of whole genome gene expression level changes in Xylella fastidiosa 9a5c biofilm, submitted to treatments with sub inhibitory and inhibitory concentrations of copper and tetracycline.

Organism:

Xylella fastidiosa 9a5c

Type:

Expression profiling by array

Platform:

GPL10380

15 Samples

Download data: PAIR

(Submitter supplied) Vibrio cholerae, the cause of cholera, can grow in a variety of environments outside of human hosts. During infection, the pathogen must adapt to significant environmental alterations, including the elevated temperature of the human gastrointestinal tract. σ32, an alternative sigma factor encoded by rpoH, activates transcription of genes involved in the heat-shock response in several bacterial species. more...

Organism:

Vibrio cholerae; Vibrio cholerae O1 biovar El Tor str. N16961

Type:

Expression profiling by array

Platform:

GPL3651

6 Samples

Download data: TXT

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Shewanella piezotolerans WP3

Type:

Expression profiling by array

Platform:

GPL16568

18 Samples

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