The role of WRKY transcription factors in stress responses
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ABSTRACT:
PROVIDER: PRJNA317324 | ENA |
REPOSITORIES: ENA
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Project description:In our laboratory we are interested in studying the functions of WRKY zinc finger type transcription factors. There are 74 members of this gene family in Arabidopsis. WRKY factors are key regulators of distinct plant defense responses and are involved in certain developmental programs e.g. trichome development and plant leaf senescence. We would like to determine the functions of a small sub-group (group II-a) of WRKY factors in response to bacterial infection. Our aim is to compare and contrast the gene expression profiles of 3-week-old wild type and WRKY T-DNA knockout mutants grown in a growth chamber under long day growth conditions and subsequently challenged for 6 hours with the virulent bacterial pathogen /Pseudomonas syringae/ DC3000. Experimenter name: Bekir Uelker Experimenter phone: 49-221-5062-310 Experimenter fax: 49-221-5062-353 Experimenter department: Somsissich Lab Experimenter institute: Max-Planck-Institute for Plant Breeding Research Experimenter address: Department of Plant Microbe Interactions Experimenter address: Carl-von-Linne-Weg 10 Experimenter address: Cologne Experimenter zip/postal_code: 50829 Experimenter country: Germany Keywords: genetic_modification_design
2007-01-22 | GSE6829 | GEO
Project description:In our laboratory we are interested in studying the functions of WRKY zink finger type transcription factors. There are 74 members of this gene family in Arabidopsis. WRKY factors are key regulators of distinct plant defense responses and are involved in certain developmental programs e.g. plant senescence. We would like to determine the functions of a small sub-group (group II-a) of WRKY factors. Our aim to compare and contrast the gene expression profiles of 35 days-old untreated wild type and WRKY T-DNA knockout plants grown in a growth chamber under long day growth conditions. All plants chosen at this stage showed slight yellowing of the first two to four leaves. Experimenter name: Bekir Uelker Experimenter phone: 49-221-5062-310 Experimenter fax: 49-221-5062-353 Experimenter department: Somsissich Lab Experimenter institute: Max-Planck-Institute for Plant Breeding Research Experimenter address: Department of Plant Microbe Interactions Experimenter address: Carl-von-Linne-Weg 10 Experimenter address: Cologne Experimenter zip/postal_code: 50829 Experimenter country: Germany Keywords: genetic_modification_design
2007-01-22 | GSE6830 | GEO
Project description:We determined on a genome-wide scale the flg22-induced in vivo DNA-binding dynamics of three of the most prominent WRKY factors, WRKY18, WRKY40 and WRKY33. The three WRKY factors each bound to more than 1000 gene loci predominantly at W-box elements, the known WRKY binding motif. Transcriptional analysis also revealed that WRKY18 and WRKY40 function redundantly as negative regulators of flg22-induced genes.
2017-01-04 | GSE85923 | GEO
Project description:We determined on a genome-wide scale the flg22-induced in vivo DNA-binding dynamics of three of the most prominent WRKY factors, WRKY18, WRKY40 and WRKY33. The three WRKY factors each bound to more than 1000 gene loci predominantly at W-box elements, the known WRKY binding motif. Transcriptional analysis also revealed that WRKY18 and WRKY40 function redundantly as negative regulators of flg22-induced genes.
2017-01-04 | GSE85922 | GEO
Project description:WRKY transcription factors in early MAMP-triggered immunity
| PRJNA339761 | ENA
Project description:In higher plants, WRKY is a large transcription factor family involved in multiple biological processes by mediating either transcriptional activation or repression. Although the conserved WRKY domain is known to mediate the binding of WRKY transcription factors to DNA, little is known about how the other domains are involved in the regulation of transcription. We find that the group IId WRKY transcription factors interact with PHD-containing OBE proteins and form redundant WRKY-OBE complexes in Arabidopsis thaliana. We find that a conserved coiled-coil motif in the group IId WRKY transcription factors functions as an OBE-interacting domain (OID), which is involved in transcriptional repression and target gene selection. The WRKY-OBE complexes mediate transcriptional repression at a large number of stress responsive genes and are required for maintaining normal plant growth and development. While the growth of high order of wrky mutants is retarded at the early seedling stage, the low order of wrky mutants show reduced plant height and increased drought tolerance, which is consistent with the increased expression of stress responsive genes, including DREB1A, DREB1B, and DREB1C. Moreover, we found that the expression levels of most of group IId WRKY genes are markedly reduced in drought stress conditions relative to non-stress conditions. These results together suggest that the WRKY-OBE repress the transcription of stress responsive genes primarily under non-stress conditions, thereby coordinating plant growth and drought stress tolerance under variable environmental conditions.
2023-07-09 | GSE221659 | GEO
Project description:In higher plants, WRKY is a large transcription factor family involved in multiple biological processes by mediating either transcriptional activation or repression. Although the conserved WRKY domain is known to mediate the binding of WRKY transcription factors to DNA, little is known about how the other domains are involved in the regulation of transcription. We find that the group IId WRKY transcription factors interact with PHD-containing OBE proteins and form redundant WRKY-OBE complexes in Arabidopsis thaliana. We find that a conserved coiled-coil motif in the group IId WRKY transcription factors functions as an OBE-interacting domain (OID), which is involved in transcriptional repression and target gene selection. The WRKY-OBE complexes mediate transcriptional repression at a large number of stress responsive genes and are required for maintaining normal plant growth and development. While the growth of high order of wrky mutants is retarded at the early seedling stage, the low order of wrky mutants show reduced plant height and increased drought tolerance, which is consistent with the increased expression of stress responsive genes, including DREB1A, DREB1B, and DREB1C. Moreover, we found that the expression levels of most of group IId WRKY genes are markedly reduced in drought stress conditions relative to non-stress conditions. These results together suggest that the WRKY-OBE repress the transcription of stress responsive genes primarily under non-stress conditions, thereby coordinating plant growth and drought stress tolerance under variable environmental conditions.
2023-07-09 | GSE221658 | GEO
Project description:This SuperSeries is composed of the SubSeries listed below.
2016-04-04 | GSE79885 | GEO
Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series
2016-04-04 | E-GEOD-79885 | biostudies-arrayexpress
Project description:The WRKY gene family has a very ancient origin but has faced extensive duplication only in the plant kingdom so much that Arabidopsis (Arabidopsis thaliana) has 74 copies of WRKY genes encoding transcription factors while 109 can be found in Rice (Oryza sativa L.). Several studies in the last decade has pointed their involvement in an heterogeneous number of biological processes, from development to hormone signalling, dormancy and senescence, but a wide number of WRKY genes are transcriptionally regulated during biotic or abiotic stresses. To investigate involvement of WRKY genes upon host and non-host infection (different strain of Magnaporthe grisea) and osmotic stress in Rice, we performed a gene family transcription analysis using custom microarray. Results indicate that a relevant part of WRKY genes are involved during at least one of these stresses, that there is little difference in transcriptional regulation between host and non-host infection or between different tissues upon the same osmotic stress. Moreover, are evident groups of genes that, often with opposite behaviour, are co-regulated in all or most of the studied conditions. We thus formulated the hypothesis that WRKY genes might be part of co-regulatory networks with other WRKY genes. Keywords: stress response
2007-04-10 | GSE5819 | GEO