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Research article - Peer-reviewed, 2008

Characterization of biosurfactant-producing strains of fluorescent pseudomonads in a soilless cultivation system

Hultberg M, Bergstrand KJ, Khalil S, Alsanius B


The use of biosurfactants is a promising alternative in biological control of zoospore-producing plant pathogens. In the present study, biosurfactant production by the indigenous population of fluorescent pseudomonads in a soilless plant cultivation system was studied during the growing season. A total of 600 strains was screened and of these 18.5% were observed to produce biosurfactants. Production of both antibiotics and biosurfactant was uncommon among the isolated strains. A selective effect of the cultivation system filter was observed on the biosurfactant-producing strains and these strains were only occasionally observed after the filter, despite having a significantly higher motility than the nonbiosurfactant-producing strains. The majority of biosurfactant-producing strains were isolated from the filter skin, which suggests that this is a suitable surface for inoculation with biocontrol strains


biological control; biosurfactants; fluorescent pseudomonads; greenhouse; motility

Published in

Antonie van Leeuwenhoek
2008, Volume: 94, number: 2, pages: 329-334
Publisher: SPRINGER

      SLU Authors

        • Khalil, Samar

          • Horticulture, Swedish University of Agricultural Sciences
        • UKÄ Subject classification

          Fish and Aquacultural Science
          Environmental Sciences related to Agriculture and Land-use

          Publication identifier


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