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Priming in Systemic Plant Immunity
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Journal Article
Priming in Systemic Plant Immunity
2009
Overview
Plants possess inducible systemic defense responses when locally infected by pathogens. Bacterial infection results in the increased accumulation of the mobile metabolite azelaic acid, a nine-carbon dicarboxylic acid, in the vascular sap of Arabidopsis that confers local and systemic resistance against the pathogen Pseudomonas syringae. Azelaic acid primes plants to accumulate salicylic acid (SA), a known defense signal, upon infection. Mutation of the AZELAIC ACID INDUCED 1 (AZI1) gene, which is induced by azelaic acid, results in the specific loss of systemic immunity triggered by pathogen or azelaic acid and of the priming of SA induction in plants. Furthermore, the predicted secreted protein AZI1 is also important for generating vascular sap that confers disease resistance. Thus, azelaic acid and AZI1 are components of plant systemic immunity involved in priming defenses.
Publisher
American Association for the Advancement of Science,The American Association for the Advancement of Science
Subject
/ Arabidopsis Proteins - genetics
/ Arabidopsis Proteins - physiology
/ Biological and medical sciences
/ Botany
/ Dicarboxylic Acids - metabolism
/ Dicarboxylic Acids - pharmacology
/ Fundamental and applied biological sciences. Psychology
/ Gene Expression Regulation, Plant
/ genes
/ Genomics
/ immunity
/ Leaves
/ Mutation
/ Oligonucleotide Array Sequence Analysis
/ Petioles
/ Phytopathology. Animal pests. Plant and forest protection
/ Plants
/ Pseudomonas syringae - growth & development
/ Pseudomonas syringae - immunology
/ Pseudomonas syringae - pathogenicity
/ sap
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