Biofilm formation is determinant in tomato rhizosphere colonization by Bacillus velezensis FZB42
2016
Al-Ali, Ameen | Deravel, Jovana | Krier, François | Béchet, Max | Ongena, Marc | Jacques, Philippe | Green University of Al Qasim ; Partenaires INRAE | Université de Liège | European Funds of INTERREG IV PhytoBio Project; INTERREG V Smartbiocontrol portfolio; BioProd project; CPER FEDER project ALIBIOTECH; 'Future Investments' program (PIA) [ANR-11-EQPX-0037]; European Union, Centrale Initiatives Foundation; Campus France through joint French-Iraqi governments program
National audience
Afficher plus [+] Moins [-]anglais. In this work, the behavior in tomato rhizosphere of Bacillus velezensis FZB42 was analyzed taking into account the surfactin production, the use of tomato roots exudate as substrates, and the biofilm formation. B. velezensis FZB42 and B. amyloliquefaciens S499 have a similar capability to colonize tomato rhizosphere. Little difference in this colonization was observed with surfactin non producing B. velezensis FZB42 mutant strains. B. velezensis is able to grow in the presence of root exudate and used preferentially sucrose, maltose, glutamic, and malic acids as carbon sources. A mutant enable to produce exopolysaccharide (EPS-) was constructed to demonstrate the main importance of biofilm formation on rhizosphere colonization. This mutant had completely lost its ability to form biofilm whatever the substrate present in the culture medium and was unable to efficiently colonize tomato rhizosphere.
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