Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of Arabidopsis after 5 min mechanical wounding

ABSTRACT: Plants are continuously exposed to a myriad of abiotic and biotic stresses. However, the molecular mechanisms by which these stress signals are perceived and transduced are poorly understood. To begin to identify primary stress signal transduction components we have focused on genes that respond rapidly (within 5 min) to stress signals. Because it has been hypothesized that detection of physical stress is a mechanism common to mounting a response against a broad range of environmental stresses, we have utilized mechanical wounding as the stress stimulus and performed whole genome microarray analysis of Arabidopsis thaliana leaf tissue. This led to the identification of a number of rapid wound responsive (RWR) genes. Comparison of RWR genes with published abiotic and biotic stress microarray datasets demonstrates a large overlap across a wide range of environmental stresses. Interestingly, RWR genes also exhibit a striking level and pattern of circadian regulation, with induced and repressed genes displaying antiphasic rhythms. Using bioinformatic analysis, we identified a novel motif overrepresented in the promoters of RWR genes, herein designated as the Rapid Stress Response Element (RSRE). We demonstrate in transgenic plants that multimerized RSREs are sufficient to confer a rapid response to both biotic and abiotic stresses in vivo, thereby establishing the functional involvement of this motif in primary transcriptional stress responses. Collectively, our data provide evidence for a novel cis-element that is distributed across the promoters of an array of diverse stress-responsive genes, poised to respond immediately and coordinately to stress signals. This structure suggests that plants may have a transcriptional network resembling the general stress signaling pathway in yeast and that the RSRE element may provide the key to this coordinate regulation. Experiment Overall Design: Three biological replicates of pooled plants were used for each treatment (Not wounded vs 5 min wounded). Each biological replicate is comprised of 2 technical replicates and a dye swap was performed for each technical replicate.

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Justin Walley

PROVIDER: E-GEOD-8740 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Mechanical stress induces biotic and abiotic stress responses via a novel cis-element.

Walley Justin W JW Coughlan Sean S Hudson Matthew E ME Covington Michael F MF Kaspi Roy R Banu Gopalan G Harmer Stacey L SL Dehesh Katayoon K

PLoS genetics 20070824 10

Plants are continuously exposed to a myriad of abiotic and biotic stresses. However, the molecular mechanisms by which these stress signals are perceived and transduced are poorly understood. To begin to identify primary stress signal transduction components, we have focused on genes that respond rapidly (within 5 min) to stress signals. Because it has been hypothesized that detection of physical stress is a mechanism common to mounting a response against a broad range of environmental stresses, ...[more]

PMID: 17953483

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Dataset Information

Transcription profiling of Arabidopsis after 5 min mechanical wounding

Publications

Mechanical stress induces biotic and abiotic stress responses via a novel cis-element.

Similar Datasets

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