Journal
FEMS MICROBIOLOGY LETTERS
Volume 242, Issue 2, Pages 249-256Publisher
OXFORD UNIV PRESS
DOI: 10.1016/j.femsle.2004.11.013
Keywords
antagonism; rhizosphere; Pseudomonas; biological control; bacteriocin
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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 representing 17 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. (C) 2004 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved.
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