Abstract
A newly identified chemical, 4-{3-[(3,5-dichloro-2-hydroxybenzylidene)amino]propyl}-4,5-dihydro-1H-pyrazol-5-one (BAPP) was characterized as a plant immunity activator. BAPP enhanced disease resistance in rice against rice blast disease and expression of a defense-related gene without growth inhibition. Moreover, BAPP was able to enhance disease resistance in dicotyledonous tomato and Arabidopsis plants against bacterial pathogen without growth inhibition, suggesting that BAPP could be a candidate as an effective plant activator. Analysis using Arabidopsis sid2-1 and npr1-2 mutants suggested that BAPP induced systemic acquired resistance (SAR) by stimulating between salicylic acid biosynthesis and NPR1, the SA receptor protein, in the SAR signaling pathway.
Keywords:
Arabidopsis; Systemic acquired resistance; plant activator; rice; tomato.
MeSH terms
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Arabidopsis / drug effects*
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Arabidopsis / growth & development
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Arabidopsis / immunology*
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Arabidopsis / microbiology
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Arabidopsis Proteins / genetics
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Arabidopsis Proteins / metabolism
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Ascomycota / pathogenicity
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Disease Resistance / drug effects*
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Disease Resistance / immunology
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Intramolecular Transferases / genetics
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Intramolecular Transferases / metabolism
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Oryza / drug effects*
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Oryza / growth & development
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Oryza / immunology*
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Oryza / microbiology
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Plant Diseases / microbiology
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Plants, Genetically Modified
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Pseudomonas syringae / pathogenicity
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Pyrazoles / pharmacology*
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Salicylic Acid / metabolism
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Signal Transduction / drug effects
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Solanum lycopersicum / drug effects*
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Solanum lycopersicum / growth & development
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Solanum lycopersicum / immunology*
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Solanum lycopersicum / microbiology
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Thiazoles / pharmacology*
Substances
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1,2-benzisothiazol-3(2H)-one1,1-dioxide
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4-(3-((3,5-dichloro-2-hydroxybenzylidene)amino)propyl)-4,5-dihydro-1H-pyrazol-5-one
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Arabidopsis Proteins
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NPR1 protein, Arabidopsis
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Pyrazoles
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Thiazoles
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oryzemate
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pyrazole
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Intramolecular Transferases
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isochorismate synthase
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Salicylic Acid