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Front Microbiol

Title:		Volatile-mediated interactions between phylogenetically different soil bacteria
Author(s):		Garbeva P; Hordijk C; Gerards S; de Boer W;
Address:		"Department Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW) Wageningen, Netherlands. Department Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW) Wageningen, Netherlands ; Department of Soil Quality, Wageningen University and Research Centre Wageningen, Netherlands"
Journal Title:		Front Microbiol
Year:		2014
Volume:		20140611
Issue:
Page Number:		289 -
DOI:		10.3389/fmicb.2014.00289
ISSN/ISBN:		1664-302X (Print) 1664-302X (Electronic) 1664-302X (Linking)
Abstract:		"There is increasing evidence that organic volatiles play an important role in interactions between micro-organisms in the porous soil matrix. Here we report that volatile compounds emitted by different soil bacteria can affect the growth, antibiotic production and gene expression of the soil bacterium Pseudomonas fluorescens Pf0-1. We applied a novel cultivation approach that mimics the natural nutritional heterogeneity in soil in which P. fluorescens grown on nutrient-limited agar was exposed to volatiles produced by 4 phylogenetically different bacterial isolates (Collimonas pratensis, Serratia plymuthica, Paenibacillus sp., and Pedobacter sp.) growing in sand containing artificial root exudates. Contrary to our expectation, the produced volatiles stimulated rather than inhibited the growth of P. fluorescens. A genome-wide, microarray-based analysis revealed that volatiles of all four bacterial strains affected gene expression of P. fluorescens, but with a different pattern of gene expression for each strain. Based on the annotation of the differently expressed genes, bacterial volatiles appear to induce a chemotactic motility response in P. fluorescens, but also an oxidative stress response. A more detailed study revealed that volatiles produced by C. pratensis triggered, antimicrobial secondary metabolite production in P. fluorescens. Our results indicate that bacterial volatiles can have an important role in communication, trophic - and antagonistic interactions within the soil bacterial community"
Keywords:		bacterial volatiles infochemicals inter-specific interactions sand microcosm transcriptional responses;
Notes:		"PubMed-not-MEDLINEGarbeva, Paolina Hordijk, Cornelis Gerards, Saskia de Boer, Wietse eng Switzerland 2014/06/27 Front Microbiol. 2014 Jun 11; 5:289. doi: 10.3389/fmicb.2014.00289. eCollection 2014"