GEO DataSets

(Submitter supplied) The purpose of this experiment was to identify genes responding differently to a 24 h low red to far red ratio (R:FR) treatment in plants grown at 16 and 22 degrees Keywords: Light treatment

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

4 Samples

Download data: CEL

(Submitter supplied) Gene expression Arabidopsis 24h cold-treated, 4c, seedlings to identify a *gold-standard* set of cold-responsive transcripts. Most of the CBF overexpression lines are in WS, therefore, it is necessary to identify a consistent set of transcripts that are detectible as cold-induced on the ATH1 platform for both WS and Columbia, so that appropriate comparisons can be made to determine the effects of low temperature in CBF overexpressing or loss of function plants in a WS background and an attempt can be made to compare the results of altered CBF function to published microarray studies. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

9 Samples

Download data: CEL

(Submitter supplied) Our goal in this study is to understand the regulation mechanism of genes including CBF regulon in low temperature. We addressed these issues by overexpressing the transcription factors encoded by genes that are rapidly induced in parallel with the CBF genes. The results show that the low temperature regulatory network is highly interconneted.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

28 Samples

Download data: CEL

(Submitter supplied) CBF1, CBF2 and CBF3 regulons comprise nearly identical gene sets The vast majority of CBF2 regulon genes were down-regulated less that 50% by overexpression of CBF2Δc, a truncated version of CBF2

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

28 Samples

Download data: CEL

(Submitter supplied) Salicylic acid (SA) levels increase in Arabidopsis upon exposure to low temperature for more than a week. This cold-induced SA biosynthesis was found to proceed through the isochorismate synthase (ICS) pathway. The sid2-1 mutant is deficient in ICS1 and does not make SA at low temperature. We used microarray analysis to examine the genes differentially regulated by low temperature that were dependent on SA

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

12 Samples

Download data: CEL

(Submitter supplied) CAMTA3 is known to be involved in regulation of induction of early cold-responsive genes, CBF1 and CBF2 at cold conditions and of suppression of SA production at warm temperature. Considering a functional redundancy of CAMTA family members in both warm and cold conditions, high-order of camta mutants, camta double and triple mutants, were generated and used to determined the effects of their regulation using microarray analysis.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

21 Samples

Download data: CEL

(Submitter supplied) The two Arabidopsis ecotypes that are adapted to Italy and Sweden, respectively, showed different degree of freezing tolerance. By comparing the low temperature transcriptomes of the IT and SW ecotypes, we showed CBF pathway plays a significant role in natural variation of freezing tolerance.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by high throughput sequencing

Platform:

GPL9302

18 Samples

Download data: CSV

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

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platforms:

GPL198 GPL9020

24 Samples

Download data: CEL, TXT

(Submitter supplied) The C-REPEAT-BINDING FACTOR (CBF) pathway has important roles in plant responses to cold stress. Previous research documented that constitutively expressed upstream transcription factors are activated by cold stress to induce the expression of CBF genes and the resulting CBF proteins trigger the expression of downstream cold responsive genes that confer freezing tolerance. In the present study, we found that dysfunction of RNA-DIRECTED DNA METHYLATION 4 (RDM4), which encodes a protein that associates with RNA polymerases Pol IV and Pol V as well as Pol II, and is required for RNA-directed DNA methylation (RdDM) and proper plant development in Arabidopsis, reduced chilling and freezing tolerance in Arabidopsis as evidenced by decreased survival and increased electrolyte leakage under cold stress conditions. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

12 Samples

Download data: CEL

(Submitter supplied) The C-REPEAT-BINDING FACTOR (CBF) pathway has important roles in plant responses to cold stress. Previous research documented that constitutively expressed upstream transcription factors are activated by cold stress to induce the expression of CBF genes and the resulting CBF proteins trigger the expression of downstream cold responsive genes that confer freezing tolerance. In the present study, we found that dysfunction of RNA-DIRECTED DNA METHYLATION 4 (RDM4), which encodes a protein that associates with RNA polymerases Pol IV and Pol V as well as Pol II, and is required for RNA-directed DNA methylation (RdDM) and proper plant development in Arabidopsis, reduced chilling and freezing tolerance in Arabidopsis as evidenced by decreased survival and increased electrolyte leakage under cold stress conditions. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL9020

12 Samples

Download data: TXT

(Submitter supplied) The two Arabidopsis ecotypes that are adapted to Italy and Sweden, respectively, showed different degree of freezing tolerance. By comparing the low temperature transcriptomes of the IT and SW ecotypes with the CBF pathway being knocked out, we showed the CBF pathway plays a significant role in natural variation of freezing tolerance.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by high throughput sequencing

Platform:

GPL17639

44 Samples

Download data: CSV

(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) During low temperature exposure, temperate plant species increase their freezing tolerance in a process termed cold acclimation. During deacclimation in response to warm temperatures cold acclimated plants lose freezing tolerance and resume growth and development. While considerable effort has been directed toward understanding the molecular and metabolic basis of cold acclimation, much less information is available about the regulation of deacclimation. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL17416

21 Samples

Download data: CEL

(Submitter supplied) The sfr6-1 mutant of Arabidopsis has been shown to be defective in freezing tolerance and fails to express a number of cold-regulated genes to normal wild type levels. The aim of this experiment was to test whether two other mutant alleles, sfr6-2 and sfr6-3 showed similar defects in cold-inducible gene expression.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

4 Samples

Download data: CEL

(Submitter supplied) Our analysis of the sfr6 freezing-sensitive mutant (Knight, H., Veale, E., Warren, G. J. and Knight, M. R. (1999). Plant Cell 11, 875-886.) and cls8 (unpublished) chilling-sensitive mutant of Arabidopsis, has revealed that the expression of certain cold-regulated genes is aberrant in both these mutants. In order to understand the molecular basis of chilling and freezing stress in Arabidopsis and also to determine commonalities and differences between these 2 different physiological stress-tolerance processes, we request transcriptome analysis for both of these mutants compared to wild type in one experiment, upon cold treatment and at ambient conditions. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

6 Samples

Download data: CEL

(Submitter supplied) To understand the role of STCH4 in cold-responsive gene regulation

Organism:

Arabidopsis thaliana

Type:

Expression profiling by high throughput sequencing

Platform:

GPL17639

18 Samples

Download data: TXT

(Submitter supplied) Plants possess a cold acclimation system to acquire freezing tolerance through pre-exposure to non-freezing low temperatures. The transcriptional cascade of C-repeat binding factors (CBFs)/dehydration response element-binding factors (DREBs) is considered a major transcriptional regulatory pathway during cold acclimation. However, little is known regarding the functional significance of mRNA stability regulation in the response of gene expression to cold stress. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

20 Samples

Download data: CEL, CHP

(Submitter supplied) St (common potato) is a freezing sensitive species unable to cold acclimate. The close wild relative Sc is freezing tolerant and able to cold acclimate. Here we compare the cold transcriptome of these two species with different levels of freezing tolerance. We also identify the putative CBF regulons by comparing the transcriptomes of wild type plants with that of 35S::AtCBF3 transgenic lines in both species.

Organism:

Solanum commersonii; Solanum tuberosum

Type:

Expression profiling by array

Platform:

GPL10564

8 Samples

Download data: GPR

(Submitter supplied) Biotic and abiotic stresses limit agricultural yields, and plants are often simultaneously exposed to multiple stresses. Combinations of stresses such as heat and drought or cold and high light intensity, have profound effects on crop performance and yeilds To analyze such responses, we initially compared transcriptome changes in ten Arabidopsis thaliana ecotypes using cold, heat, high light, salt and flagellin treatments as single stress factors or their double combinations.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL16226

207 Samples

Download data: XYS

(Submitter supplied) Five SAGE libraries were generated from A. thaliana leaf tissue collected at time points ranging from 30 minutes to one week of low temperature treatment (4°C). Over 240,000 high quality SAGE tags, corresponding to 16,629 annotated genes, provided a comprehensive survey of changes in the transcriptome in response to low temperature, from perception of the stress to acquisition of freezing tolerance. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by SAGE

Platform:

GPL25

5 Samples

Download data