Journal Article10.1146/ANNUREV.PY.33.090195.001503
Active oxygen in plant pathogenesis.
C J Baker,E W Orlandi +1 more
873
TL;DR: Modifications of the luminol-dependent chemiluminescence assay have facilitated studies on both the production and scavenging of active oxygen that occurs during incompatible plantlbacteria interactions, and it is still unclear which mechanisms predominate during plant! pathogen interactions.
read more
Abstract: Plant cells produce active oxygen during interactions with potential patho gens. Active oxygen species, including superoxide, hydrogen peroxide, and the hydroxyl radical, could potentially affect many cellular processes in volved in plant/pathogen interactions. Active oxygen can be difficult to monitor in plant cells because many of the species are short-lived and are subject to cellular antioxidant mechanisms such as superoxide dismutases, peroxidases, the ascorbate/glutathione cycle, and catalase. Modifications of the luminol-dependent chemiluminescence assay have facilitated studies on both the production and scavenging of active oxygen that occurs during incompatible plantlbacteria interactions. Many potential sources for active oxygen production have been identified such as NADPH oxidases and per oxidases, but it is still unclear which mechanisms predominate during plant! pathogen interactions. The active oxygen produced in response to pathogens and elicitors has been hypothesized to have direct antimicrobial effects and to play a role in other defense mechanisms including lignin production, lipid peroxidation, phytoalexin production, and the hypersensitive response. tThe US Govenunent has the right to retain a nonexclusive, royalty-free license in and to any copyright covering this paper.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Molecular-genetic evaluation of fungal molecules for roles in pathogenesis to plants
Olen C. Yoder,B. Gillian Turgeon +1 more
TL;DR: To understand the molecular basis of fungal disease, it is necessary to identify the fungal molecules that areessential for pathogenic processes, and to distinguish them from molecules that may be present during infection but not critical to its outcome.
34
Elicitor induced defence responses in medicago sativa
M. Tang,C. J. Smith +1 more
TL;DR: Evidence is presented that H2 O2 is part of the signal transduction chain and forms part of a signalling pathway leading from perception of elicitor to induction of defence responses.
34
Bursaphelenchus xylophilus and B. mucronatus secretomes: a comparative proteomic analysis.
Joana M. S. Cardoso,Sandra I. Anjo,Luís Fonseca,Conceição Egas,Bruno Manadas,Isabel Abrantes +5 more
TL;DR: The analysis presented expands knowledge about molecular basis of B. xylophilus and B. mucronatus hosts interaction and supports the hypothesis of a key role of secreted peptidases in B. Xylphilus pathogenicity.
The gene-for-gene concept and beyond: Interactions and signals
TL;DR: Recent data are reviewed, confirming that the oxidative burst seen in the defense response of tomato to C. fulvum has strong similarity to that of mammalian phagocytic neutrophil cells.
34
Molecular aspects of plant responses to pathogens
TL;DR: Though specific avirulence genes, elicitor receptors have been reported, the production of defense-related compounds is nonspecific and can be elicited by pathogens, pathogen products and many organics and inorganics.
34
References
Timing of molecular events following elicitor treatment of plant cells
TL;DR: The data suggest that altered protein expression may be triggered by free radicals connected to activated oxygen metabolism, and that phytoalexins do not account for either free radicals detected earlier by the electron paramagnetic resonance signals or altered plant membrane function.
54
A comparison of the effects of a fungal elicitor and ultraviolet radiation on ion transport and hydrogen peroxide synthesis by rose cells
Tyron Arnott,Terence M. Murphy +1 more
TL;DR: The kinetics and amounts of K+ efflux and of H2O2 production and degradation were similar to those observed when the cells were treated with u.v. radiation, interpreted in terms of a common ion transport process stimulated by elicitor and u.