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Three Novel Xenorhabdus–Steinernema Associations and Evidence of Strains of X. khoisanae Switching Between Different Clades

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Abstract

Xenorhabdus species are normally closely associated with entomopathogenic nematodes of the family Steinernematidae. Strain F2, isolated from Steinernema nguyeni, was identified as Xenorhabdus bovienii and strains J194 and SB10, isolated from Steinernema jeffreyense and Steinernema sacchari as Xenorhabdus khoisanae, based on phenotypic characteristics and sequencing of 16S rRNA and housekeeping genes dnaN, gltX, gyrB, infB and recA. All three strains produced antimicrobial compounds that inhibited the growth of Gram-positive and Gram-negative bacteria. This is the first report of associations between strains of the symbiotic bacteria X. bovienii with S. nguyeni, and X. khoisanae with S. jeffreyense and S. sacchari. This provides evidence that strains of Xenorhabdus spp. may switch between nematode species within the same clade and between different clades.

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Authors and Affiliations

  1. Department of Microbiology, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa

    Jonike Dreyer & Leon M. T. Dicks

  2. Department of Conservation Ecology and Entomology, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa

    Antoinette P. Malan

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  1. Jonike Dreyer
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  2. Antoinette P. Malan
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  3. Leon M. T. Dicks
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Correspondence to Leon M. T. Dicks.

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Dreyer, J., Malan, A.P. & Dicks, L.M.T. Three Novel Xenorhabdus–Steinernema Associations and Evidence of Strains of X. khoisanae Switching Between Different Clades. Curr Microbiol 74, 938–942 (2017). https://doi.org/10.1007/s00284-017-1266-2

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  • DOI: https://doi.org/10.1007/s00284-017-1266-2

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