Article (Scientific journals)
Isolation of an n-alkylated benzylamine derivative from Pseudomonas putida BTP1 as elicitor of induced systemic resistance in bean
Ongena, MARC; Jourdan, Emmanuel; Schafer, M. et al.
2005In Molecular Plant-Microbe Interactions, 18 (6), p. 562-569
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Keywords :
biological control; plant growth-promoting rhizobacteria
Abstract :
[en] Root treatment of Phaseolus vulgaris with the nonpathogenic Pseudomonas putida BTP1 led to significant reduction of the disease caused by the pathogen Botrytis cinerea on leaves. The molecular determinant of P putida BTP1 mainly responsible for the induced systemic resistance (ISR) was isolated from cell-free culture fluid after growth of the strain in the iron-poor casamino acid medium. Mass spectrometry analyses performed on both the bacterial product and synthetic analogues revealed a polyalkylated benzylamine structure, with the quaternary ammonium substituted by methyl, ethyl, and C-13 aliphatic groups responsible for the relative hydrophobicity of the molecule. The specific involvement of the N-alkylated benzylamine derivative (NABD) in ISR elicitation was first evidenced by testing the purified compound that mimicked the protective effect afforded by crude supernatant samples. The evidence was supported by the loss of elicitor activity of mutants impaired in NABD biosynthesis. Our experiments also showed that other iron-regulated metabolites secreted by the strain are not involved in ISR stimulation. Thus, these results indicate a wider variety of Pseudomonas determinants for ISR than reported to date.
Disciplines :
Microbiology
Author, co-author :
Ongena, MARC ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Jourdan, Emmanuel ;  Université de Liège - ULiège > Centre Wallon de biologie industrielle
Schafer, M.
Kech, C.
Budzikiewicz, H.
Luxen, André ;  Université de Liège - ULiège > Chimie organique de synthèse
Thonart, Philippe ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech - Biochimie et microbiologie industrielles
Language :
English
Title :
Isolation of an n-alkylated benzylamine derivative from Pseudomonas putida BTP1 as elicitor of induced systemic resistance in bean
Publication date :
2005
Journal title :
Molecular Plant-Microbe Interactions
ISSN :
0894-0282
eISSN :
1943-7706
Publisher :
Amer Phytopathological Soc, St Paul, France
Volume :
18
Issue :
6
Pages :
562-569
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 03 December 2009

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