Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of Arabidopsis wild type and abi1td mutant plants stressed by ozone or drought to better understand ABA signalling

ABSTRACT: Ozone at an elevated level is an important environmental stress factor that limits plant growth and development. To test how O3-induced ROS signalling interacts with the ABA pathway we present a global characterization of O3-responsive genes in the abi1td mutant. To understand better ABA signalling and the interactions between stress-response pathways we also performed a microarray analysis of drought-treated abi1td and WT plants. Since ABA signalling is well known to mediate defined responses based on the WT and different mutants analysis in drought stress conditions, the comparison of the O3 and drought stress response in abi1td enabled the identification of new processes depending on ABA-related pathways in O3-treated plants. Altogether, our findings indicate that ABI1 plays the role of a general signal transducer linking diferrent hormone signalling pathways to O3 stress tolerance.

Key words: ROS signalling; ABA signalling; ozone stress; drought stress; environmental stress; gene knockout;

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Leo Zeef

PROVIDER: E-MEXP-1863 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Gene expression profiling of ozone-treated Arabidopsis abi1td insertional mutant: protein phosphatase 2C ABI1 modulates biosynthesis ratio of ABA and ethylene.

Ludwików Agnieszka A Kierzek Dorota D Gallois Patrick P Zeef Leo L Sadowski Jan J

Planta 20090825 5

We report on the characterization of the interaction between reactive oxygen species signalling and abscisic acid (ABA)-mediated gene network in ozone (O(3)) stress response. To identify the stress-related signalling pathways and possible cross-talk controlled by an ABA-negative regulator, the protein phosphatase 2C abscisic acid insensitive1 (ABI1), we performed a genome-wide transcription profiling of O(3)-treated wild-type and ABI1 knockout (abi1td) plants. In addition, to better understand A ...[more]

PMID: 19705149

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Project description:CBP20 (Cap-Binding Protein 20) encodes a small subunit of the cap-binding complex (CBC), which is involved in the conserved cell processes related to RNA metabolism in plants and, simultaneously, engaged in the signaling network of drought response, which is dependent on ABA. CBP20 (Cap-Binding Protein 20), which encodes a small subunit of the cap-binding complex (CBC). CBC is a heterodimer that is formed by two subunits – a small one that is encoded by CBP20 and a large subunit that is encoded by CBP80 (Cap-Binding Protein 80). Both the nucleotide and amino acid sequences of CBP20 are highly conserved across species from Saccharomyces to Homo sapiens. CBP20 is involved in very conserved cell processes that are related to RNA metabolism such as polyadenylation and splicing, miRNA biogenesis, and according to the most recent reports, to histone methylation (Kuhn et al. 2008; Kim et al. 2008; Gregory et al. 2008; Kmieciak et al. 2002; Laubinger et al. 2008; Li et al. 2016). Most striking, however, is its simultaneous engagement in ABA signaling during seed germination and drought response (Papp et al. 2004; Jäger et al. 2011). It was shown that an Arabidopsis cbp20 mutant exhibited a hypersensitivity to ABA during seed germination and a better performance under water deficit conditions than the WT (Papp et al. 2004; Jäger et al. 2011). Interestingly, the Arabidopsis knockout mutant in CBP80 (Cap-Binding Protein 80; ABA hypersensitive 1) exhibited a similar phenotype when exposed to ABA or drought stress (Hugouvieux et al. 2001; 2002; Daszkowska-Golec et al. 2013). In Solanum tuberosum, an amiR80.2-14 mutant (CBP80 silenced using artificial microRNAs) was also reported to be drought tolerant (Pieczyński et al. 2013). Water-deficiency conditions related gene expression analysis was performed in barley in two genotypes: the wild-type (WT) barley cultivar 'Sebastian’ and hvcbp20.ab mutant; in three time points: (1) optimal water conditions, (2) onset of drought stress and (3) after 10 days of prolonged drought stress in the second leaf; analyses were performed in three biological replicates. Here, we report the enhanced tolerance to drought stress of barley mutant in the HvCBP20 gene.Transcriptome analysis using the Agilent Barley Microarray integrated with observed phenotypic traits allowed to conclude that the hvcbp20.ab mutant exhibited better fitness to stress conditions by its much more efficient and earlier activation of stress-preventing mechanisms. The network hubs involved in the adjustment of hvcbp20.ab mutant to the drought conditions were proposed. These results enabled to make a significant progress in understanding the role of CBP20 in the drought stress response.

Project description:Systems responses of mature leaves from 4 reference cultivars of a larger collection of European potato cultivars (Solanum tuberosum L.) are investigated by metabolome profiling and RNA-Sequencing. The chosen reference cultivars, Milva, Alegria, Desiree, and Saturna, vary in ascending order in regard to drought tolerance. Systems analyses are based on 3 independent field trials and 3 paralleled greenhouse trials. Robust responses across all cultivars and conditions to natural seasonal drought stress comprise proline, raffinose, galactinol, arabitol, arabinonic acid, chlorogenic acid, and 102 transcripts which consist to a high proportion of heat shock proteins and genes with signaling or regulatory functions, such as a homolog of abscisic acid receptor PYL4. Constitutive differences of the tolerant cultivars, Desiree and Saturna, compared to the sensitive cultivars include arbutin (hydroquinone-beta-D-glucopyranoside), octopamine (p-hydroxyphenylethanolamine), ribitol and 248 differential transcripts. Many of these transcripts are disease related, receptor kinases, or regulatory genes, for example a homolog of the Arabidopsis FOUR LIPS MYB-regulator of stomatal cell proliferation. Functional enrichment analyses imply that heat stress is a major acclimation component of potato leaves to agronomical relevant drought stress. Enhanced leaf heat stress is a result of drought caused by loss of transpiration cooling. This effect and CO2-limitation are the main dilemmas of drought- or ABA-induced stomatal closure. Constitutive differences between tolerant and sensitive cultivars indicate partially synergistic interactions of drought and biotic stress responses. We suggest that drought tolerance of the potato reference cultivars may be caused by general resistance mechanisms which are part of previously selected pathogen tolerance. Transcriptome profiling by RNA-sequencing of 48 leaf samples from 4 potato cultivars grown under control or drought stress conditions in 6 independent experiments

Dataset Information

Transcription profiling of Arabidopsis wild type and abi1td mutant plants stressed by ozone or drought to better understand ABA signalling

Publications

Gene expression profiling of ozone-treated Arabidopsis abi1td insertional mutant: protein phosphatase 2C ABI1 modulates biosynthesis ratio of ABA and ethylene.

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