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THE OXIDATIVE BURST IN PLANT DISEASE RESISTANCE.
  • C. Lamb, R. Dixon
  • Biology, Medicine
  • Annual review of plant physiology and plant…
  • 1 June 1997
TLDR
Emerging data indicate that the oxidative burst reflects activation of a membrane-bound NADPH oxidase closely resembling that operating in activated neutrophils, which underlies the expression of disease-resistance mechanisms. Expand
Activation Tagging Identifies a Conserved MYB Regulator of Phenylpropanoid Biosynthesis
TLDR
A novel approach for enhancing the accumulation of natural products based on activation tagging by Agrobacterium-mediated transformation with a T-DNA that carries cauliflower mosaic virus 35S enhancer sequences at its right border is reported. Expand
H2O2 from the oxidative burst orchestrates the plant hypersensitive disease resistance response
TLDR
It is reported here that H2O2 from this oxidative burst not only drives the cross-linking of cell wall structural proteins, but also functions as a local trigger of programmed death in challenged cells and as a diffusible signal for the induction in adjacent cells of genes encoding cellular protectants. Expand
Activation tagging in Arabidopsis.
TLDR
Activation tagging using T-DNA vectors that contain multimerized transcriptional enhancers from the cauliflower mosaic virus (CaMV) 35S gene has been applied to Arabidopsis plants, and it is shown that overexpressed genes are almost always found immediately adjacent to the inserted CaMV 35S enhancers. Expand
Nitric oxide functions as a signal in plant disease resistance
TLDR
It is shown that nitric oxide potentiates the induction of hypersensitive cell death in soybean cells by reactive oxygen intermediates and functions independently of such intermediates to induce genes for the synthesis of protective natural products. Expand
Signal interactions between nitric oxide and reactive oxygen intermediates in the plant hypersensitive disease resistance response
TLDR
It is shown that in soybean cells unregulated NO production at the onset of a pathogen-induced hypersensitive response (HR) is not sufficient to activate hypersensitive cell death, and the HR is triggered only by balanced production of NO and ROIs. Expand
Reactive Oxygen Intermediates Mediate a Systemic Signal Network in the Establishment of Plant Immunity
TLDR
It is shown that inoculation of Arabidopsis leaves with avirulent Pseudomonas syringae induces secondary oxidative bursts in discrete cells in distant tissues, leading to low-frequency systemic micro-HRs. Expand
A putative lipid transfer protein involved in systemic resistance signalling in Arabidopsis
TLDR
It is shown that Defective in induced resistance 1-1 (dir1-1) exhibits wild-type local resistance to avirulent and virulent Pseudomonas syringae, but that pathogenesis-related gene expression is abolished in uninoculated distant leaves and dir1- 1 fails to develop SAR to virulent pseudomonas or Peronospora parasitica. Expand
Salicylic acid potentiates an agonist-dependent gain control that amplifies pathogen signals in the activation of defense mechanisms.
The phenylpropanoid-derived natural product salicylic acid (SA) plays a key role in disease resistance. However, SA administered in the absence of a pathogen is a paradoxically weak inductive signal,Expand
Calcium-mediated apoptosis in a plant hypersensitive disease resistance response
TLDR
O2 stimulates a rapid influx of Ca2+ into soybean cells, which activates a physiological cell death program resulting in the generation of large DNA fragments and cell corpse morphology--including cell shrinkage, plasma membrane blebbing and nuclear condensation--characteristic of apoptosis. Expand
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