Article (Scientific journals)
MALDI-FTICR MS Imaging as a Powerful Tool to Identify Paenibacillus Antibiotics Involved in the Inhibition of Plant Pathogens
Debois, Delphine; Ongena, Marc; Cawoy, Hélène et al.
2013In Journal of the American Society for Mass Spectrometry, 24 (8), p. 1202-1213
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Keywords :
MALDI-FT-ICR Mass Spectrometry Imaging; Paenibacillus polymyxa; Fusarium oxysporum; Antagonism; Fusaricidins; Cyclic lipopeptides
Abstract :
[en] Nowadays, microorganisms are more and more often used as biocontrol agents for crop protection against diseases. Among them, bacteria of Bacillus and Paenibacillus genders are already used as commercial biocontrol agents. Their mode of action is supposed to be related to their production of antibiotics, such as cyclic lipopeptides, which exhibit great antimicrobial activities. We chose to work with a Paenibacillus polymyxa strain (Pp56) very resistant to various microorganisms. The bacteria were grown simultaneously with Fusarium oxysporum and we applied matrix-assisted laser desorption/ionization-Fourier transform ion cyclotron resonance (MALDI-FTICR) mass spectrometry to identify the antibiotics compounds present in the fungus growth inhibition area. We, therefore, identified fusaricidins A, B, and C and numerous members of the LI-F antibiotics family. MALDIFTICR mass spectrometry imaging was then used to follow the diffusion of lipopeptides involved in the inhibitory activity over time. We analyzed the molecular content of the inhibitory area at different Pp56 and Fusarium incubation durations and concluded that some lipopeptides such as fusaricidin B and a mixture of LI-F05b/06b/08a were mainly involved in the defense mechanism of Pp56. Our study confirms that MALDI imaging may be a powerful tool to quickly determine which molecular species is involved in an antagonism with another microorganism, avoiding time-consuming steps of extraction, purification, and activity tests, which are still commonly used in microbiology.
Disciplines :
Chemistry
Author, co-author :
Debois, Delphine ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Ongena, Marc ;  Université de Liège - ULiège > Chimie et bio-industries > Bio-industries
Cawoy, Hélène ;  Université de Liège - ULiège > Chimie et bio-industries > Bio-industries
De Pauw, Edwin  ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Language :
English
Title :
MALDI-FTICR MS Imaging as a Powerful Tool to Identify Paenibacillus Antibiotics Involved in the Inhibition of Plant Pathogens
Publication date :
August 2013
Journal title :
Journal of the American Society for Mass Spectrometry
ISSN :
1044-0305
eISSN :
1879-1123
Publisher :
Springer-Verlag
Volume :
24
Issue :
8
Pages :
1202-1213
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
FRFC n°2.4567.12
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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since 02 May 2013

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