title: Gamma-caprolactone stimulates growth of quorum-quenching Rhodococcus populations in a large-scale hydroponic system for culturing Solanum tuberosum.
abstract: Bacteria degrading quorum sensing (QS) signals have been proposed as biocontrol agents able to quench QS-dependent expression of virulence symptoms caused by Pectobacterium on potato plants. We report here that gamma-caprolactone (GCL) treatment stimulated growth of the native QS-degrading bacterial community in an industrial plant hydroponic system for culturing Solanum tuberosum. Post-GCL treatment, QS-degrading bacteria were mainly identified as Rhodococcus isolates, while Agrobacterium isolates dominated under similar untreated conditions. Most of the assayed Rhodococcus isolates exhibited efficient biocontrol activity for protecting potato tubers. Analytical chemistry approach revealed the rapid degradation of GCL introduced in the plant cultures.
authors.affiliation: Centre National de la Recherche Scientifique, Institut des Sciences du Végétal, Gif-sur-Yvette, France.
authors.forename: Amélie
authors.initials: A
authors.lastname: Cirou
authors.forename: Aurélie
authors.initials: A
authors.lastname: Raffoux
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Diallo
authors.forename: Xavier
authors.initials: X
authors.lastname: Latour
authors.forename: Yves
authors.initials: Y
authors.lastname: Dessaux
authors.forename: Denis
authors.initials: D
authors.lastname: Faure
mesh_terms: D060054:Agrobacterium / Q000254:growth & development / Q000378:metabolism*; D061046:Biological Control Agents; D002208:Caproates / Q000494:pharmacology; D002851:Chromatography, High Pressure Liquid; D018527:Hydroponics; D007783:Lactones / Q000494:pharmacology; D013058:Mass Spectrometry; D044043:Pectobacterium / Q000187:drug effects / Q000378:metabolism* / Q000472:pathogenicity; D010935:Plant Diseases / Q000382:microbiology*; D053038:Quorum Sensing / Q000187:drug effects; D012240:Rhodococcus / Q000254:growth & development / Q000378:metabolism*; D011198:Solanum tuberosum / Q000382:microbiology*; D014774:Virulence
chemical_list: D061046:Biological Control Agents; D002208:Caproates; D007783:Lactones; C121056:caprolactone