title: Antagonistic activity among 2,4-diacetylphloroglucinol-producing fluorescent Pseudomonas spp.
abstract: Strains of fluorescent Pseudomonas spp. that produce 2,4-diacetylphloroglucinol (2,4-DAPG) differ in their ability to colonize roots. In this study, we screened 47 2,4-DAPG-producing strains representing17 distinct genotypes for antagonistic activity associated with the production of bacteriocins. Upon induction, over 70% of the strains inhibited the growth of other isolates in vitro. Greenhouse assays indicated that populations of sensitive strains in wheat rhizosphere soil declined more rapidly in the presence of antagonists than when introduced alone. Antagonism can influence the ability of biocontrol agents to establish and maintain effective population densities in situ.
authors.affiliation: Skryabin Institute of Biochemistry and Physiology of Microorganisms of the Russian Academy of Sciences, Pushchino, Russia.
authors.forename: Shamil
authors.initials: S
authors.lastname: Validov
authors.forename: Olga
authors.initials: O
authors.lastname: Mavrodi
authors.forename: Leonardo
authors.initials: L
authors.lastname: De La Fuente
authors.forename: Alexander
authors.initials: A
authors.lastname: Boronin
authors.forename: David
authors.initials: D
authors.lastname: Weller
authors.forename: Linda
authors.initials: L
authors.lastname: Thomashow
authors.forename: Dmitri
authors.initials: D
authors.lastname: Mavrodi
mesh_terms: D001430:Bacteriocins / Q000096:biosynthesis / Q000494:pharmacology; D005838:Genotype; D010696:Phloroglucinol / Q000031:analogs & derivatives / Q000494:pharmacology*; D010802:Phylogeny; D018517:Plant Roots / Q000187:drug effects* / Q000382:microbiology; D011549:Pseudomonas / Q000235:genetics / Q000502:physiology*; D012988:Soil Microbiology; D014908:Triticum / Q000382:microbiology*
chemical_list: D001430:Bacteriocins; C059817:2,4-diacetylphloroglucinol; D010696:Phloroglucinol