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Changes in gene expression in MKK2 and MKKKC5 mutants after Alternaria infection

ABSTRACT: The mkkkC5 mutant, a knockout line of MAPKKKC5, shows changes in growth and development, as well as an altered Alternaria sensitivity. It was shown by Brader and Djamei et al.(2007) that Alternaria brassicicola sensitivity is also influenced by MKK2-activity. Aim of this experiment is to access the transcriptional changes in the mkkkc5plants as well as in plants overexpressing a constitutively active MKK2-version (MKK2EE). The second part of the experiment addresses transcriptional changes in these plants after Alternaria brassicicola infection. au07-09_alternaria Keywords: treatment variations

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE14443 | GEO | 2009/02/15

SECONDARY ACCESSION(S): PRJNA114497

REPOSITORIES: GEO

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Changes in gene expression in MKK2 and MKKKC5 mutants after Alternaria infection

Project description:The mkkkC5 mutant, a knockout line of MAPKKKC5, shows changes in growth and development, as well as an altered Alternaria sensitivity. It was shown by Brader and Djamei et al.(2007) that Alternaria brassicicola sensitivity is also influenced by MKK2-activity. Aim of this experiment is to access the transcriptional changes in the mkkkc5plants as well as in plants overexpressing a constitutively active MKK2-version (MKK2EE). The second part of the experiment addresses transcriptional changes in these plants after Alternaria brassicicola infection. au07-09_alternaria Keywords: treatment variations Alternaria brassicicola infection of 25 day old mkkkc5- , pGreen::MKK2EE-myc and WT Col-0 plants. Sampling after 0, 1 and 2 days. Comparison between mutants and WT at corresponding timepoints. Additionally comparison between WT-samples at different timepoints. 16 dye-swap - CATMA arrays

2009-02-15 | E-GEOD-14443 | biostudies-arrayexpress

Changes in gene expression in MKK2 and MKKKC5 mutants: wt vs mutant comparison

Project description:The mkkkC5 mutant, a knockout line of MAPKKKC5, shows changes in growth and development, as well as an altered Alternaria sensitivity. It was shown by Brader and Djamei et al.(2007) that Alternaria brassicicola sensitivity is also influenced by MKK2-activity. Aim of this experiment is to access the transcriptional changes in the mkkkc5plants as well as in plants overexpressing a constitutively active MKK2-version (MKK2EE). The second part of the experiment addresses transcriptional changes in these plants after Alternaria brassicicola infection. - au07-09_alternaria - mkk2ee and mkkkc5 mutants Keywords: wt vs mutant comparison

2009-02-15 | GSE14444 | GEO

Changes in gene expression in MKK2 and MKKKC5 mutants: wt vs mutant comparison

Project description:The mkkkC5 mutant, a knockout line of MAPKKKC5, shows changes in growth and development, as well as an altered Alternaria sensitivity. It was shown by Brader and Djamei et al.(2007) that Alternaria brassicicola sensitivity is also influenced by MKK2-activity. Aim of this experiment is to access the transcriptional changes in the mkkkc5plants as well as in plants overexpressing a constitutively active MKK2-version (MKK2EE). The second part of the experiment addresses transcriptional changes in these plants after Alternaria brassicicola infection. - au07-09_alternaria - mkk2ee and mkkkc5 mutants Keywords: wt vs mutant comparison Comparison between the over-expressed mutant of the MKK2 gene and the KO mutant for the MKKKC5 gene versus the wild type. 4 dye-swap - CATMA arrays

2009-02-15 | E-GEOD-14444 | biostudies-arrayexpress

Changes in gene expression in MKK2 and MKKKC5 mutants

2009-02-15 | GSE14501 | GEO

Alternaria brassicicola infection regulates miRNAs in Arabidopsis thaliana [sRNA]

Project description:Plant microRNAs (miRNAs) have been implicated in plant immunity. These mainly focusing Arabidopsis thaliana threatened by (hemi-)biotrophic pathogens such as the bacterial pathogen Pseudomonas syringae. Here, we show that the Arabidopsis miRNA pathway is important for defense responses against the necrotrophic fungus Alternaria brassicicola. The miRNA pathway mutant ago1 exhibits an exaggerated response when treated with A. brassicicola, proposing that AGO1 is positive regulator. We found a subset of Arabidopsis miRNAs that quickly change their expression and their abundance in AGO1 complexes in plants exposed to A. brassicicola. The miRNAs responding to pathogen treatment are mainly targeting genes encoding metabolic enzymes, proteins involved protein degradation or transposons. In case of miR163, A. brassicicola infection results in increased levels of miRNA precursors and preferential accumulation of an unspliced form of pri-miR163, suggesting that A. brassicicola infection changes the transcriptional and post-regulation of pri-miRNAs. miR163 acts as a negative regulator of plant defense because mir163 mutants are more resistant when treated with A. brassicicola. Taken together, our results reveal the existence of positively and negatively acting Arabidopsis miRNA modulating the defense responses against A. brassicicola and highlight the importance of host miRNAs in the interaction between plants and necrotrophic pathogens.

2019-06-17 | GSE83487 | GEO

Alternaria brassicicola infection regulates miRNAs in Arabidopsis thaliana [mRNA]

2019-06-17 | GSE83478 | GEO

Transcription profiling of Arabidopsis thaliana mutants treated with flg22, Alternaria brassicicola, Methyl jasmonate and Pst DC3000 bacteria

Project description:Gibberellin (GA) promotes plant growth by destabilizing DELLA proteins. DELLA proteins integrate multiple hormonal and environmental stress responses. We investigated the role of GA and DELLA proteins in plant defence. We used microarrays to detail the global programme of gene expression controlled by DELLA proteins and identified distinct classes of differentially regulated genes in response to pathogens, hormones or pathogen elicitors. Experiment Overall Design: Five weeks old short day grown Arabidopsis leaf discs were used to treat with flg22 and samples were collected after 1 hour and 2 hour time points. For Alternaria brassicicola, five weeks old plants were drop inoculated with 4x 5Âµl droplets of Alternaria brassicicola spores (5x105 spores/ml) and samples were collected 3 days post inoculation. Five weeks old plants were infiltrated with Pst DC3000 (2x105cfu/ml) bacteria and samples were collected after 12 hours post infiltration. For methyl jasmonate treatments, five weeks old plants were sprayed with 10ÂµM Methyl Jasmonate solution, covered with plastic bags and samples were collected after one hour.

2010-03-02 | E-GEOD-17464 | biostudies-arrayexpress

Phosphoproteome profiles of the phytopathogenic fungi Alternaria brassicicola and Botrytis cinerea

Project description:This study describes the gel-free phosphoproteomic analysis the phytopathogenic fungi Alternaria brassicicola and Botrytis cinerea grown in vitro under non-limiting conditions.

2014-06-09 | PXD000817 | Pride

Transcriptome of mkk1-mkk2 mutants

Project description:au08-02_mkk1-mkk2 - mkk1-mkk2 - Functional redundancy of the two MAPKKs MKK1 and MKK2. - mkk1 and mkk2 k.o. plants were crossed. Seedlings homozygous for mkk1 and/or mkk2, in parallel with control wild type seedlings, were grown on sterile medium. RNA was extracted from non-treated seedlings. aRNA was synthesised using the Ambion aRNA kit. Transcriptome data will be compared with those from a (already available) microarray of a mutant lacking the MAPKKkinase that is upstream of MKK1 and MKK2 (MEKK1).

2010-10-11 | GSE24516 | GEO

Dual-transcritome analysis of germinating Arabidopsis seeds in response to necrotrophic fungus Alternaria brassicicola

Project description:We analyzed dual-transcriptome changes in germinating Arabidopsis seeds at three development stages (3, 6 and 10 days after sowing) with or without Alternaria brassicicola. Differentailly expressed genes were identified from both seed and fungus.

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