Expression data from Arabidopsis under hydrogen peroxide and light treatment
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ABSTRACT:
ORGANISM(S): Arabidopsis thaliana
PROVIDER: GSE40574 | GEO | 2012/09/05
SECONDARY ACCESSION(S): PRJNA174337
REPOSITORIES: GEO
Similar Datasets
Project description:Green plants are more robust to hydrogen peroxide (H2O2) stress and contain high endogeneous H2O2 levels which is generated during photorespiration and photosynthesis. Therefore, exgeneous H2O2 application mostly impose oxidative stress. To reduce endogenous H2O2 background, we adopted a strategy which is to grow Arabidopsis seedlings in the dark to eliminate light-induced H2O2 production, thus to reduce the endogenous H2O2 level. Exogenous H2O2 was then applied to induce transcriptome changes. Global gene expression is studied and compared between samples collected under 7d dark, 7d H2O2 treatment under dark and 7d light conditions. We cultured seedlings in the dark to reduce endogenous H2O2. Three conditions were used for transcriptome profiling: dark grown (dark); dark grown with exogenous H2O2 treatment (H2O2); and light grown (light). Three types of conditions were used for Arabidopsis seedling culture: dark, dark with 5 mM H2O2 treatment and light. Each condition was performed with two biological replicates. The seedlings were harvested at 7 days old.
2012-09-05 | E-GEOD-40574 | biostudies-arrayexpress
Project description:The high metabolic flux through photorespiration constitutes a significant part of the carbon cycle. Although, the major enzymatic steps of the photorespiratory pathway are well characterized, little information is available on the functional significance of photorespiration beyond carbon recycling. Particularly important in this respect is the peroxisomal catalase activity which removes photorespiratory H2O2 generated during the oxidation of glycolate to glyoxylate, thus maintaining the cellular redox homeostasis governing the perception, integration and execution of stress responses. By perfroming a chemical screen, we identified 34 small molecules that alleviate the negative effects of photorespiration in Arabidopsis thaliana mutants lacking photorespiratory catalase (cat2). The chlorophyll fluorescence parameter photosystem II maximum efficiency (Fv'/Fm') was used as a high-throughput readout. The most potent chemical that could rescue the photorespiratory phenotype of cat2 is a pro-auxin that contains a synthetic auxin-like substructure belonging to the phenoxy herbicide family which can be released in planta. The naturally occurring indole-3-acetic acid (IAA) and other chemically distinct synthetic auxins also inhibited the photorespiratory-dependent cell death in cat2 mutants, implying a role for auxin signaling in stress tolerance. We used global transcriptome profiling to characterize the effect of a novel pro-axin structure (2-(2,4-dichlorophenoxy)-N-[4-(isobutyrylamino)-3-methoxyphenyl]propanamide) on Arabidopsis Col0 seedlings
2013-11-02 | GSE52013 | GEO
Project description:The high metabolic flux through photorespiration constitutes a significant part of the carbon cycle. Although, the major enzymatic steps of the photorespiratory pathway are well characterized, little information is available on the functional significance of photorespiration beyond carbon recycling. Particularly important in this respect is the peroxisomal catalase activity which removes photorespiratory H2O2 generated during the oxidation of glycolate to glyoxylate, thus maintaining the cellular redox homeostasis governing the perception, integration and execution of stress responses. By perfroming a chemical screen, we identified 34 small molecules that alleviate the negative effects of photorespiration in Arabidopsis thaliana mutants lacking photorespiratory catalase (cat2). The chlorophyll fluorescence parameter photosystem II maximum efficiency (Fv'/Fm') was used as a high-throughput readout. The most potent chemical that could rescue the photorespiratory phenotype of cat2 is a pro-auxin that contains a synthetic auxin-like substructure belonging to the phenoxy herbicide family which can be released in planta. The naturally occurring indole-3-acetic acid (IAA) and other chemically distinct synthetic auxins also inhibited the photorespiratory-dependent cell death in cat2 mutants, implying a role for auxin signaling in stress tolerance. We used global transcriptome profiling to characterize the effect of a novel pro-axin structure (2-(2,4-dichlorophenoxy)-N-[4-(isobutyrylamino)-3-methoxyphenyl]propanamide) on Arabidopsis Col0 seedlings 2-(2,4-dichlorophenoxy)-N-[4-(isobutyrylamino)-3-methoxyphenyl]propanamid (5 μM) was added to seven-day-old Arabidopsis Col0 seedlings grown in a 96-well plate setup. Control plants were treated with solvent (DMSO) only. RNA was extracted 24 h following chemical addition.
2013-11-02 | E-GEOD-52013 | biostudies-arrayexpress
Project description:Hydrogen peroxide (H2O2) can act as a signaling molecule that influences various aspects of plant growth and development, including stress signaling and cell death. To unravel the molecular mechanisms that regulate the response towards an impact of increased H2O2 levels in plant cells, we focused on the photorespiration-dependent peroxisomal H2O2 production in Arabidopsis thaliana mutants lacking CATALASE2 (CAT2) activity (cat2-2) and screened for second-site mutations that attenuate the Fv'/Fm' decrease and lesion formation linked to the cat2-2 phenotype. A mutation in GLYCOLATE OXIDASE 1, encoding one of the two photorespiratory isoforms of glycolate oxidase rescued the cell death phenotype of cat2-2 plants under photorespiration-promoting conditions. Interestingly, introduction of gox2 into the cat2 background did not have the same effect and the double cat2 gox2 mutants were as affected as the parental cat2 mutants under conditions promoting photorespiration. Using a series of physiological, biochemical and metabolomic approaches we investigated the differential photorespiratory response of cat2 mutants underlied by the lack of GOX1 and GOX2. These differences are in line with the non-redundant functions of GOX1 and GOX2 which could be observed under enhanced photorespiration.
2016-06-10 | GSE77170 | GEO
Project description:Hydrogen peroxide (H2O2) is an important signaling molecule in plant developmental processes and stress responses. However, whether H2O2-mediated signaling can crosstalk with plant hormone signaling is largely unclear. Here, we show that H2O2 induces oxidation of the BRASSINAZOLE-RESISTANT1 (BZR1) transcription factor, which functions as a master regulator of Brassinosteroid (BR) signaling. Oxidative modification enhances BZR1 transcriptional activity by promoting its interaction with regulators of auxin- and light-signaling, including AUXIN RESPONSE FACTOR6 (ARF6) and PHYTOCHROME INTERACTING FACTOR4 (PIF4). Genome-wide analysis shows that H2O2-dependent regulation of BZR1 activity plays a major role in modifying gene expression related to several BR-mediated biological processes. Furthermore, we show that the thioredoxin TRXh5 can interact with, and catalyze reduction of, BZR1. We conclude that reversible oxidation of BZR1 connects H2O2- and thioredoxin-mediated redox signaling to BR signaling to regulate plant development
2018-03-21 | GSE110488 | GEO
Project description:Hydrogen peroxide (H2O2) can act as a signaling molecule that influences various aspects of plant growth and development, including stress signaling and cell death. To unravel the molecular mechanisms that regulate the response towards an impact of increased H2O2 levels in plant cells, we focused on the photorespiration-dependent peroxisomal H2O2 production in Arabidopsis thaliana mutants lacking CATALASE2 (CAT2) activity (cat2-2).
2016-06-10 | GSE77171 | GEO
Project description:Alterations of hydrogen peroxide (H2O2) levels have a profound impact on numerous signaling cascades orchestrating stress responses, plant growth and development, including programmed cell death. To expand the repertoire of known molecular mechanisms implicated in H2O2 signaling, we performed a forward chemical screen to identify small molecules that could alleviate the photorespiratory-induced cell death phenotype of Arabidopsis thaliana mutants lacking H2O2 scavenging capacity by peroxisomal CATALASE2. Here, we report the characterization of pakerine, a m-sulfamoyl benzamide from the sulfonamide family. Pakerine alleviates the cell death phenotype of cat2 mutants exposed to photorespiration-promoting conditions and delays dark-induced senescence in wild type Arabidopsis leaves. By using a combination of transcriptomics, metabolomics and affinity purification we identified ABNORMAL INFLORESCENCE MERISTEM 1 (AIM1) as a putative protein target of pakerine. AIM1 is a 3-hydroxyacyl-CoA dehydrogenase involved in β-fatty acid oxidation that contributes to jasmonic acid (JA) and salicylic acid (SA) biosynthesis. Whereas intact JA biosynthesis was not required for pakerine bioactivity, our results point towards a role for β-oxidation-dependent SA production in execution of H2O2-mediated cell death.
2020-09-03 | GSE155105 | GEO
Project description:Alterations of hydrogen peroxide (H2O2) levels have a profound impact on numerous signaling cascades orchestrating stress responses, plant growth and development, including programmed cell death. To expand the repertoire of known molecular mechanisms implicated in H2O2 signaling, we performed a forward chemical screen to identify small molecules that could alleviate the photorespiratory-induced cell death phenotype of Arabidopsis thaliana mutants lacking H2O2 scavenging capacity by peroxisomal CATALASE2. Here, we report the characterization of pakerine, a m-sulfamoyl benzamide from the sulfonamide family. Pakerine alleviates the cell death phenotype of cat2 mutants exposed to photorespiration-promoting conditions and delays dark-induced senescence in wild type Arabidopsis leaves. By using a combination of transcriptomics, metabolomics and affinity purification we identified ABNORMAL INFLORESCENCE MERISTEM 1 (AIM1) as a putative protein target of pakerine. AIM1 is a 3-hydroxyacyl-CoA dehydrogenase involved in β-fatty acid oxidation that contributes to jasmonic acid (JA) and salicylic acid (SA) biosynthesis. Whereas intact JA biosynthesis was not required for pakerine bioactivity, our results point towards a role for β-oxidation-dependent SA production in execution of H2O2-mediated cell death.
2020-09-03 | GSE155026 | GEO
Project description:Hydrogen peroxide (H2O2) can act as a signaling molecule that influences various aspects of plant growth and development, including stress signaling and cell death. To unravel the molecular mechanisms that regulate the response towards an impact of increased H2O2 levels in plant cells, we focused on the photorespiration-dependent peroxisomal H2O2 production in Arabidopsis thaliana mutants lacking CATALASE2 (CAT2) activity (cat2-2) and screened for second-site mutations that attenuate the Fv'/Fm' decrease and lesion formation linked to the cat2-2 phenotype. A mutation in GLYCOLATE OXIDASE 1, encoding one of the two photorespiratory isoforms of glycolate oxidase rescued the cell death phenotype of cat2-2 plants under photorespiration-promoting conditions. Interestingly, introduction of gox2 into the cat2 background did not have the same effect and the double cat2 gox2 mutants were as affected as the parental cat2 mutants under conditions promoting photorespiration. Using a series of physiological, biochemical and metabolomic approaches we investigated the differential photorespiratory response of cat2 mutants underlied by the lack of GOX1 and GOX2. These differences are in line with the non-redundant functions of GOX1 and GOX2 which could be observed under enhanced photorespiration. Unstressed and stressed samples of cat2 gox1 and cat2 gox2 double mutants in triplicate
2016-06-10 | E-GEOD-77170 | biostudies-arrayexpress
Project description:Adaptation to hydrogen peroxide in Saccharomyces cerevisiae is profiled with expression arrays. Adaptation describes the process in which a mild dose of toxin (in this case, hydrogen peroxide) is able to protect against a later acute dose. Here, we study two adaptive protocols (0.1 mM H2O2 and 0.1 + 0.4 mM H2O2) and one acute protocol (0.4 mM H2O2) to identify processes uniquely involved in adaptation. Predictions from these studies are validated in expression profiling of deletion mutants of the transcription factors Yap1, Mga2, and Rox1.
2009-04-23 | GSE12602 | GEO