THE OXIDATIVE BURST IN PLANT DISEASE RESISTANCE

THE OXIDATIVE BURST IN PLANT DISEASE RESISTANCE ▪ Abstract Rapid generation of superoxide and accumulation of H 2 O 2 is a characteristic early feature of the hypersensitive response following perception of pathogen avirulence signals. Emerging data indicate that the oxidative burst reflects activation of a membrane-bound NADPH oxidase closely resembling that operating in activated neutrophils. The oxidants are not only direct protective agents, but H 2 O 2 also functions as a substrate for oxidative cross-linking in the cell wall, as a threshold trigger for hypersensitive cell death, and as a diffusible signal for induction of cellular protectant genes in surrounding cells. Activation of the oxidative burst is a central component of a highly amplified and integrated signal system, also involving salicylic acid and perturbations of cytosolic Ca 2+ , which underlies the expression of disease-resistance mechanisms. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Plant Biology Annual Reviews

THE OXIDATIVE BURST IN PLANT DISEASE RESISTANCE

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Publisher
Annual Reviews
Copyright
Copyright © 1997 by Annual Reviews Inc. All rights reserved
Subject
Review Articles
ISSN
1040-2519
D.O.I.
10.1146/annurev.arplant.48.1.251
Publisher site
See Article on Publisher Site

Abstract

▪ Abstract Rapid generation of superoxide and accumulation of H 2 O 2 is a characteristic early feature of the hypersensitive response following perception of pathogen avirulence signals. Emerging data indicate that the oxidative burst reflects activation of a membrane-bound NADPH oxidase closely resembling that operating in activated neutrophils. The oxidants are not only direct protective agents, but H 2 O 2 also functions as a substrate for oxidative cross-linking in the cell wall, as a threshold trigger for hypersensitive cell death, and as a diffusible signal for induction of cellular protectant genes in surrounding cells. Activation of the oxidative burst is a central component of a highly amplified and integrated signal system, also involving salicylic acid and perturbations of cytosolic Ca 2+ , which underlies the expression of disease-resistance mechanisms.

Journal

Annual Review of Plant BiologyAnnual Reviews

Published: Jun 1, 1997

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