Active Oxygen Species as Mediators of Plant Immunity: Three Case Studies
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H. Sandermann
Abstract
A burst of active oxygen species (AOS) is known to be involved in local cell death as part of plant defence against pathogens. It is, however, under dispute to what extent AOS can induce pathogen resistance and immunity throughout the plant. Three experimental strategies that reveal a primary role for AOS and a surprisingly low chemical and spatial specificity are now described for tobacco and Arabidopsis thaliana plants. Ozone is a gaseous AOS that was applied to non-transgenic plants. Hydrogen peroxide or singlet oxygen are AOS that were induced by high-light treatment of transgenic plants that contained antisense constructs inhibiting catalase activity or chlorophyll biosynthetic enzymes. In all cases, activated oxygen species, cellular lesions, ethylene and salicylic acid, and components of major plant defence systems (systemic acquired resistance, hypersensitive response) were induced, as was resistance towards pathogens (tobacco mosaic virus, Pseudomonas syringae or Peronospora parasitica). It is concluded that active oxygen species can act as mediators of plant immunity so that new non-pesticidal plant protection strategies could be developed.
Copyright © 2000 by Walter de Gruyter GmbH & Co. KG
Articles in the same Issue
- To Our Authors, Readers and Subscribers
- Highlight: Plant Biological Chemistry
- The Structural Properties of Plant Peroxisomes and Their Metabolic Significance
- Active Oxygen Species as Mediators of Plant Immunity: Three Case Studies
- Post-Transcriptional Regulation of Phenylalanine Ammonia-Lyase Expression in Tobacco Following Recovery from Gene Silencing
- Two Differentially Regulated Class II Chitinases from Parsley
- IAA-Synthase, an Enzyme Complex from Arabidopsis thaliana Catalyzing the Formation of Indole-3-Acetic Acid from (S)-Tryptophan
- Topology Studies of the Chloroplast Protein Import Channel Toc75
- Plant Methionine Synthase: New Insights into Properties and Expression
- The Hepta-? -Glucoside Elicitor-Binding Proteins from Legumes Represent a Putative Receptor Family
- Octadecanoid and Jasmonate Signaling in Tomato (Lycopersicon esculentum Mill.) Leaves: Endogenous Jasmonates Do Not Induce Jasmonate Biosynthesis
- Metabolic Activity Decreases as an Adaptive Response to Low Internal Oxygen in Growing Potato Tubers
- Structure-Activity Relationships of Synthetic Analogs of Jasmonic Acid and Coronatine on Induction of Benzophenanthridine Alkaloid Accumulation in Eschscholzia californica Cell Cultures
- Identification of the Arabidopsis thaliana Flavonoid 3'-Hydroxylase Gene and Functional Expression of the Encoded P450 Enzyme
- Gut Bacteria May Be Involved in Interactions between Plants, Herbivores and Their Predators: Microbial Biosynthesis of N-Acylglutamine Surfactants as Elicitors of Plant Volatiles
- Different Signaling Pathways Are Involved in CCKB Receptor-Mediated MAP Kinase Activation in COS-7 Cells
- Non-Specific Depurination Activity of Saporin-S6, a Ribosome-Inactivating Protein, under Acidic Conditions
- Molecular Evolution in the Hypervariable Regions of Fetuin: Comparison between Human and African Green Monkey Fetuin
Articles in the same Issue
- To Our Authors, Readers and Subscribers
- Highlight: Plant Biological Chemistry
- The Structural Properties of Plant Peroxisomes and Their Metabolic Significance
- Active Oxygen Species as Mediators of Plant Immunity: Three Case Studies
- Post-Transcriptional Regulation of Phenylalanine Ammonia-Lyase Expression in Tobacco Following Recovery from Gene Silencing
- Two Differentially Regulated Class II Chitinases from Parsley
- IAA-Synthase, an Enzyme Complex from Arabidopsis thaliana Catalyzing the Formation of Indole-3-Acetic Acid from (S)-Tryptophan
- Topology Studies of the Chloroplast Protein Import Channel Toc75
- Plant Methionine Synthase: New Insights into Properties and Expression
- The Hepta-? -Glucoside Elicitor-Binding Proteins from Legumes Represent a Putative Receptor Family
- Octadecanoid and Jasmonate Signaling in Tomato (Lycopersicon esculentum Mill.) Leaves: Endogenous Jasmonates Do Not Induce Jasmonate Biosynthesis
- Metabolic Activity Decreases as an Adaptive Response to Low Internal Oxygen in Growing Potato Tubers
- Structure-Activity Relationships of Synthetic Analogs of Jasmonic Acid and Coronatine on Induction of Benzophenanthridine Alkaloid Accumulation in Eschscholzia californica Cell Cultures
- Identification of the Arabidopsis thaliana Flavonoid 3'-Hydroxylase Gene and Functional Expression of the Encoded P450 Enzyme
- Gut Bacteria May Be Involved in Interactions between Plants, Herbivores and Their Predators: Microbial Biosynthesis of N-Acylglutamine Surfactants as Elicitors of Plant Volatiles
- Different Signaling Pathways Are Involved in CCKB Receptor-Mediated MAP Kinase Activation in COS-7 Cells
- Non-Specific Depurination Activity of Saporin-S6, a Ribosome-Inactivating Protein, under Acidic Conditions
- Molecular Evolution in the Hypervariable Regions of Fetuin: Comparison between Human and African Green Monkey Fetuin
