GEO DataSets

Analysis of roots from 10-day-old plants grown with selenate, the major form of bioavailable selenium (Se) in soil. Plants have the capacity to attenuate the toxic effects of Se. Results provide insight into molecular mechanisms underlying Se-stress responses and Se tolerance mechanisms in plants.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array, count, 2 agent sets

Platform:

GPL198

Series:

GSE9311

4 Samples

Download data: CEL

(Submitter supplied) Selenate is chemically similar to sulfate and can be taken up and assimilated by plants via the same transporters and enzymes. In contrast to many other organisms, selenium (Se) has not been shown to be essential for higher plants. In excess, Se is toxic and restricts development. Both Se deficiency and toxicity pose problems worldwide. To obtain better insight into the effects of Se on plant metabolism and into plant mechanisms involved in Se tolerance, the transcriptome of Arabidopsis plants grown with or without selenate was studied, and Se-responsive genes identified. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Datasets:

GDS3225 GDS3243

Platform:

GPL198

8 Samples

Download data: CEL

Analysis of shoots from 10-day-old plants grown with selenate, the major form of bioavailable selenium (Se) in soil. Plants have the capacity to attenuate the toxic effects of Se. Results provide insight into molecular mechanisms underlying Se-stress responses and Se tolerance mechanisms in plants.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array, count, 2 agent sets

Platform:

GPL198

Series:

GSE9311

4 Samples

Download data: CEL

(Submitter supplied) Testing the consequences of the absence of the chromatin-associated HMGB1 protein on the transcriptome in Arabidopsis. Keywords: Comparison of mutant and wildtype samples.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL6177

1 Sample

Download data: TXT

(Submitter supplied) HRE1 and HRE2 are two ERF transcription factors induced by low oxygen. In this work we analyzed the effect of ectopic expression of HRE1 and HRE2 on the arabidopsis transcriptome in aerobic and hypoxic (1% O2) conditions. While HRE1 has a moderate effect on the expression of anaerobic genes under hypoxia, HRE2 does not affect them either under aerobic or hypoxic conditions.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

12 Samples

Download data: CEL

(Submitter supplied) Comparison of gene expression between shoots of root-wounded seedlings and shoots of control seedlings in Arabidopsis. We identified wounding-induced early (30 min) and late (360 min) root to shoot responsive genes (RtS).

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL888

8 Samples

Download data: TXT

(Submitter supplied) We analyzed the interaction between Arabidopsis and western flower thrips (Frankliniella occidentalis), which are one of the most serious insect pests of cultivated plants. A total of 1.2K potential biotic and abiotic stress-related genes were selected from the genes covered by the Arabidopsis 7K array (RIKEN, Japan) and Arabidopsis oligo microarray (Agilent Technologies, USA) for this study. The 21- day-old plants were feeded by western flower thrips in an acryl cylinder chamber with air ventilation windows covered with a fine mesh. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL3181

4 Samples

Download data: TXT

(Submitter supplied) Myzus persicae (green peach aphid) feeding on Arabidopsis thaliana induces a defense response, quantified as reduced aphid progeny production, in infested leaves but not in other parts of the plant. Similarly, infiltration of aphid saliva into Arabidopsis leaves causes only a local increase in aphid resistance. Further characterization of the defense-eliciting salivary components indicates that Arabidopsis recognizes a proteinaceous elicitor with a size between 3 to 10 kD. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

6 Samples

Download data: CEL, TXT

(Submitter supplied) Plant responses to abiotic stresses are accompanied by massive changes in transcriptome composition. To provide a comprehensive view of stress-induced changes in the Arabidopsis thaliana transcriptome, we have used whole-genome tiling arrays to analyze the effects of salt, osmotic, cold and heat stress as well as application of the hormone abscisic acid (ABA), an important mediator of stress responses.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by genome tiling array

Platform:

GPL1980

39 Samples

Download data: CEL

(Submitter supplied) The aim of this study was to examine the contribution of ARF6 and ARF8 to flower gene expression. Flowers from arf6 arf8 plants undergo a developmental arrest at approximately stage 12, just prior to flower opening. Flowers from wild-type, ARF6/arf6 arf8/arf8, and arf6 arf8 plants were separated into stage 1-10 flowers, stage 11+12 flowers, and stage 13-14 flowers to define the developmental stages at which ARF6 and ARF8 are required for gene expression. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Dataset:

GDS2114

Platform:

GPL198

12 Samples

Download data: CEL

(Submitter supplied) The aim of this study was to examine the roles of Auxin Response Factors (ARFs) in flower gene expression. Flowers from arf6 arf8 plants undergo a developmental arrest at approximately stage 12, just prior to flower opening. Wild-type, ARF6/arf6 arf8/arf8, and arf6 arf8 plants were treated with 10 uM indole-3-acetic acid for thirty minutes to identify genes that respond rapidly to auxin in an ARF6/ARF8-dependent manner. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Dataset:

GDS1408

Platform:

GPL198

7 Samples

Download data: CEL

Analysis of mutant flowers heterozygous for arf6 but homozygous for arf8, and mutants double homozygous for both arf6 and arf8. Mutants examined at various stages of development. ARF6 and ARF8 are auxin response factors that coordinate the transition from immature to mature fertile flowers.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array, count, 4 development stage, 3 genotype/variation, 2 tissue sets

Platform:

GPL198

Series:

GSE2848

12 Samples

Download data: CEL

Analysis of stage 1-14 flowers from wild type Columbia, arf6/arf6 ARF8/arf8, and arf6 arf8 plants after 30 minute treatment with 10 uM indole-3-acetic acid (IAA). Results provide insight into early flower development and identify genes that respond rapidly to auxin in an ARF6/ARF8-dependent manner.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array, count, 3 agent, 3 genotype/variation sets

Platform:

GPL198

Series:

GSE2847

7 Samples

Download data: CEL

(Submitter supplied) Oryza sativa cv. Nipponbare was engineered to over-express a barley alanine aminotransferase (alaAT) gene using the promoter (OsANT1) from a rice aldehyde dehydrogenase gene that expresses in roots. We are using biotechnology to improve the nitrogen use efficiency of rice by over-expressing alaAT in a tissue specific (root) manner. The AlaAT enzyme is a reversible aminotransferase that is linked to both C and N metabolism since it uses pyruvate plus glutamate to produce alanine and 2-oxoglutarate, and visa versa.

Organism:

Oryza sativa

Type:

Expression profiling by array

Platform:

GPL2025

32 Samples

Download data: CEL

(Submitter supplied) To investigate the response of Arabidopsis thaliana plants to non-freezing, cool temperatures, we subjected four week old plants to various chilling temperatures at defined times during the diurnal cycle to control for diurnal effects on transcription. From the same plants, metabolites and enzyme activities were measured as well. Interestingly a gradual change could be observed over a wide range of temperatures. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

24 Samples

Download data: CEL

(Submitter supplied) Expression Data of Barley Crown and Growing Point Tissue Under Salt Stress abd JA treatment Keywords: treatments (control, salt stressed, JA and JA plus salt stress)

Organism:

Hordeum vulgare

Type:

Expression profiling by array

Platform:

GPL1340

8 Samples

Download data

(Submitter supplied) The aim of this study is to identify Arabidopsis genes whose expression is altered by aphid feeding. An understanding of the plant aphid interaction at the level of the plant transcriptome will 1) consolidate current areas of investigation focused on the phloem composition (the aphid diet), 2) open up areas of plant aphid interactions for ourselves and other workers, 3) Contribute to understanding the use of new molecular technologies in an environmental context and 4) contribute to existing and development of novel control strategies.Our Arabidopsis/Myzus persicae system provides a valuable model for the study because of: a) the advantages of using Arabidopsis, b) The ability to use clonal insects, c) phloem feeding aphids facilitate focus on a specific cell type, d) aphid stylectomy allows collection of pure phloem sap to monitor ‘phloem phenotype’ of the plant and the insect diet, e) we have techniques to monitor the reproductive performance and feeding behaviour aphids.Our strategy has been to test the function of selected genes, particularly those regulating phloem composition (the feeding site of the aphid) based on current phloem models of phloem function. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Dataset:

GDS2523

Platform:

GPL198

6 Samples

Download data: CEL

Analysis of rosette leaves subjected to aphid infestation. To date, little is known about how plants perceive and defend themselves from phloem-feeding aphids. Results provide insight into the molecular basis of phloem-feeding insect-plant interactions and the development of control strategies.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array, count, 2 stress sets

Platform:

GPL198

Series:

GSE6823

6 Samples

Download data: CEL

(Submitter supplied) To understand how plants respond to anoxia-reoxygenation, we have employed a global microarray expression profiling as a basic platform to characterize genes with the potential to mediate the recovery responses in Arabidopsis. 7-day-old seedlings were trated with 4hr and 8hr anoxia, and then reoxygenated in air for 0, 0.5, 1, 3, 6 hrs. Genes changed in both condition were designated as reoxygenation-regulated genes. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL12621

78 Samples

Download data: TXT

(Submitter supplied) The exosome complex plays a central role in RNA metabolism, and each of its core subunits is essential for viability in yeast However, comprehensive studies of exosome substrates and functional analyses of its subunits in multi.CELlular eukaryotes are lacking Here we show that, in sharp contrast to yeast and metazoan exosome complexes, individual subunits of the plant exosome core are functionally specialized Using whole-genome oligonucleotide tiling microarray analyses of csl4 null mutant plants and conditional genetic depletions of RRP4 and RRP41, we uncovered unexpected functional plasticity in the plant exosome core as well as generated a set of high-resolution genome-wide maps of Arabidopsis exosome targets These analyses provide evidence for widespread polyadenylation- and exosome-mediated RNA quality control in plants and reveal novel aspects of stable structural RNA metabolism Finally, numerous novel exosome substrates were discovered, including a select subset of mRNAs, miRNA processing intermediates, and hundreds of noncoding RNAs, the vast majority of which have not been previously described This large collection of RNAs belong to a Òdeeply hiddenÓ layer of the transcriptome that is tightly repressed and can only be visualized upon inhibition of exosome activity These first genome-wide maps of exosome substrates will aid in illuminating new fundamental components and regulatory mechanisms of eukaryotic transcriptomes Keywords: Strand-specific gene expression analysis using whole-genome oligonucleotide tiling microarray analyses of three exosome subunits, using csl4 null mutant plants and conditional genetic depletions of RRP4 and RRP41.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by genome tiling array

Platform:

GPL1979

32 Samples

Download data: CEL