| Title: | Plant-associated Bacillus mobilizes its secondary metabolites upon perception of the siderophore pyochelin produced by a Pseudomonas competitor |
| Author(s): | Andric S; Rigolet A; Arguelles Arias A; Steels S; Hoff G; Balleux G; Ongena L; Hofte M; Meyer T; Ongena M; |
| Address: | "Microbial Processes and Interactions Laboratory, Terra Teaching and Research Center, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium. sofijaandric@yahoo.com. Microbial Processes and Interactions Laboratory, Terra Teaching and Research Center, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium. Ecology and Biodiversity, Department of Biology, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands. Laboratory of Gene Expression and Cancer, GIGA-MBD, University of Liege, Liege, Belgium. Laboratory of Phytopathology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium. Microbial Processes and Interactions Laboratory, Terra Teaching and Research Center, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium. thibault.meyer@univ-lyon1.fr. UMR Ecologie Microbienne, F-69622, University of Lyon, Universite Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, Villeurbanne, France. thibault.meyer@univ-lyon1.fr. Microbial Processes and Interactions Laboratory, Terra Teaching and Research Center, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium. marc.ongena@uliege.be" |
| DOI: | 10.1038/s41396-022-01337-1 |
| ISSN/ISBN: | 1751-7370 (Electronic) 1751-7362 (Print) 1751-7362 (Linking) |
| Abstract: | "Bacillus velezensis is considered as model species for plant-associated bacilli providing benefits to its host such as protection against phytopathogens. This is mainly due to the potential to secrete a wide range of secondary metabolites with specific and complementary bioactivities. This metabolite arsenal has been quite well defined genetically and chemically but much remains to be explored regarding how it is expressed under natural conditions and notably how it can be modulated upon interspecies interactions in the competitive rhizosphere niche. Here, we show that B. velezensis can mobilize a substantial part of its metabolome upon the perception of Pseudomonas, as a soil-dwelling competitor. This metabolite response reflects a multimodal defensive strategy as it includes polyketides and the bacteriocin amylocyclicin, with broad antibiotic activity, as well as surfactin lipopeptides, contributing to biofilm formation and enhanced motility. Furthermore, we identified the secondary Pseudomonas siderophore pyochelin as an info-chemical, which triggers this response via a mechanism independent of iron stress. We hypothesize that B. velezensis relies on such chelator sensing to accurately identify competitors, illustrating a new facet of siderophore-mediated interactions beyond the concept of competition for iron and siderophore piracy. This phenomenon may thus represent a new component of the microbial conversations driving the behavior of members of the rhizosphere community" |
| Keywords: | *Pseudomonas Siderophores/metabolism *Bacillus/metabolism Iron/metabolism Perception; |
| Notes: | "MedlineAndric, Sofija Rigolet, Augustin Arguelles Arias, Anthony Steels, Sebastien Hoff, Gregory Balleux, Guillaume Ongena, Loic Hofte, Monica Meyer, Thibault Ongena, Marc eng England 2022/11/12 ISME J. 2023 Feb; 17(2):263-275. doi: 10.1038/s41396-022-01337-1. Epub 2022 Nov 10" |
