Global switches and fine-tuning-ABA modulates plant pathogen defense

Plants are obliged to defend themselves against a wide range of biotic and abiotic stresses. Complex regulatory signaling networks mount an appropriate defense response depending on the type of stress that is perceived. In response to abiotic stresses such as drought, cold, and salinity, the functio...

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Bibliographic Details
Published in:Molecular plant-microbe interactions Vol. 21; no. 6; pp. 709 - 719
Main Authors: Asselbergh, Bob, De Vleesschauwer, David, Höfte, Monica
Format: Journal Article
Language:English
Published: United States The American Phytopathological Society 01.06.2008
Subjects:
Abscisic Acid - metabolism
Abscisic Acid - physiology
callose
ethylene
Ethylenes - metabolism
Gene Expression Regulation, Plant
Immunity, Innate - genetics
Models, Biological
Plant Diseases - genetics
Plant Diseases - microbiology
Plants - genetics
Plants - metabolism
Plants - microbiology
salicylic acid
Signal Transduction - physiology
ISSN:0894-0282, 1943-7706
Online Access:Get full text
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Summary:Plants are obliged to defend themselves against a wide range of biotic and abiotic stresses. Complex regulatory signaling networks mount an appropriate defense response depending on the type of stress that is perceived. In response to abiotic stresses such as drought, cold, and salinity, the function of abscisic acid (ABA) is well documented: elevation of plant ABA levels and activation of ABA-responsive signaling result in regulation of stomatal aperture and expression of stress-responsive genes. In response to pathogens, the role of ABA is more obscure and is a research topic that has long been overlooked. This article aims to evaluate and review the reported modes of ABA action on pathogen defense and highlight recent advances in deciphering the complex role of ABA in plant-pathogen interactions. The proposed mechanisms responsible for positive or negative effects of ABA on pathogen defense are discussed, as well as the regulation of ABA signaling and in planta ABA concentrations by beneficial and pathogenic microorganisms. In addition, the fast-growing number of reports that characterize antagonistic and synergistic interactions between abiotic and biotic stress responses point to ABA as an essential component in integrating and fine-tuning abiotic and biotic stress-response signaling networks.
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ISSN:0894-0282
1943-7706
DOI:10.1094/MPMI-21-6-0709