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• W2093297788 endingPage "1210" @default.
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• W2093297788 abstract "Hydrogen peroxide (H2O2) operates as a signaling molecule in eukaryotes, but the specificity of its signaling capacities remains largely unrevealed. Here, we analyzed whether a moderate production of H2O2 from two different plant cellular compartments has divergent effects on the plant transcriptome. Arabidopsis thaliana overexpressing glycolate oxidase in the chloroplast (Fahnenstich et al., 2008Fahnenstich H. Scarpeci T.E. Valle E.M. Flügge U.-I. Maurino V.G. Generation of hydrogen peroxide in chloroplasts of Arabidopsis overexpressing glycolate oxidase as an inducible system to study oxidative stress.Plant Physiol. 2008; 148: 719-729Crossref PubMed Scopus (108) Google Scholar; Balazadeh et al., 2012Balazadeh S. Jaspert N. Arif M. Mueller-Roeber B. Maurino V.G. Expression of ROS-responsive genes and transcription factors after metabolic formation of H2O2 in chloroplasts.Frontiers in Plant Science. 2012; 3: 234Crossref PubMed Scopus (46) Google Scholar) and plants deficient in peroxisomal catalase (Queval et al., 2007Queval G. Issakidis-Bourguet E. Hoeberichts F.A. Vandorpe M. Gakière B. Vanacker H. Miginiac-Maslow M. Van Breusegem F. Noctor G. Conditional oxidative stress responses in the Arabidopsis photorespiratory mutant cat2 demonstrate that redox state is a key modulator of daylength-dependent gene expression, and define photoperiod as a crucial factor in the regulation of H2O2-induced cell death.Plant J. 2007; 52: 640-657Crossref PubMed Scopus (328) Google Scholar; Inzé et al., 2012Inzé A. Vanderauwera S. Hoeberichts F.A. Vandorpe M. Van Gaever T. Van Breusegem F. A subcellular localization compendium of hydrogen peroxide-induced proteins.Plant, Cell and Environment. 2012; 35: 308-320Crossref PubMed Scopus (75) Google Scholar) were grown under non-photorespiratory conditions and then transferred to photorespiratory conditions to foster the production of H2O2 in both organelles. We show that H2O2 originating in a specific organelle induces two types of responses: one that integrates signals independently from the subcellular site of H2O2 production and another that is dependent on the H2O2 production site. H2O2 produced in peroxisomes induces transcripts involved in protein repair responses, while H2O2 produced in chloroplasts induces early signaling responses, including transcription factors and biosynthetic genes involved in production of secondary signaling messengers. There is a significant bias towards the induction of genes involved in responses to wounding and pathogen attack by chloroplastic-produced H2O2, including indolic glucosinolates-, camalexin-, and stigmasterol-biosynthetic genes. These transcriptional responses were accompanied by the accumulation of 4-methoxy-indol-3-ylmethyl glucosinolate and stigmasterol." @default.
• W2093297788 created "2016-06-24" @default.
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• W2093297788 date "2014-07-01" @default.
• W2093297788 modified "2023-10-10" @default.
• W2093297788 title "Spatial H2O2 Signaling Specificity: H2O2 from Chloroplasts and Peroxisomes Modulates the Plant Transcriptome Differentially" @default.
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