NDLI: Abscisic acid interacts antagonistically with classical defense pathways in rice-migratory nematode interaction.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Nahar, Kamrun Kyndt, Tina Nzogela, Yasinta Beda Gheysen, Godelieve
Description	Country affiliation: Belgium Author Affiliation: Nahar K ( Department of Molecular Biotechnology, Ghent University, Ghent, Belgium.)
Abstract	Studies involving plant-nematode interactions provide an opportunity to unravel plant defense signaling in root tissues. In this study, we have characterized the roles of salicylate (SA), jasmonate (JA), ethylene (ET) and abscisic acid (ABA) in plant defense against the migratory nematode Hirschmanniella oryzae in the monocot model plant rice (Oryza sativa). Experiments with exogenous hormone applications, biosynthesis inhibition and mutant/transgenic lines were executed to test the effect on H. oryzae parasitism in rice roots. Our results demonstrate that an intact ET, JA and SA biosynthesis pathway is a prerequisite for defense against H. oryzae. By contrast, exogenous ABA treatment drastically compromised the rice defense towards this nematode. Gene expression analyses using quantitative reverse transcription polymerase chain reaction (qRT-PCR) demonstrate that the disease-inducing effect of ABA is likely to be the result of an antagonistic interaction between this hormone and the SA/JA/ET-dependent basal defense system. Collectively, in rice defense against H. oryzae, at least three pathways, namely SA, JA and ET, are important, while ABA plays a negative role in defense. Our results suggest that the balance of ABA and SA/JA/ET signaling is an important determinant for the outcome of the rice-H. oryzae interaction.
File Format	HTM / HTML
ISSN	0028646X
Issue Number	3
Volume Number	196
e-ISSN	14698137
Journal	New Phytologist
Language	English
Publisher	Wiley
Publisher Date	2012-11-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Botany Abscisic Acid Biosynthesis Host-parasite Interactions Nematoda Pathogenicity Oryza Sativa Physiology Immunology Acetates Metabolism Animals Cyclopentanes Ethylenes Gene Expression Regulation, Plant Parasitology Oxylipins Plant Diseases Plant Roots Plant Shoots Plants, Genetically Modified Pyridones Pharmacology Rna, Plant Genetics Reverse Transcriptase Polymerase Chain Reaction Methods Salicylic Acid Signal Transduction Transcription, Genetic Transcriptome Journal Article
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science

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