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Numerical taxonomy of fluorescent Pseudomonas associated with tomato roots

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Abstract

The phenetic taxonomy of 110 fluorescent bacterial strains, isolated from the roots of tomatoes and other plants was numerically studied through 97 features including 69 assimilation tests. Thirty-two reference strains of various Pseudomonas spp. were additionally included. The strains clustered into 16 clusters at the 74% similarity level when using Jaccard similarity coefficients. Almost all field strains belonged to the P. fluorescens/P. putida-complex while none clustered with P. syringae and allied bacteria. The biovar II branch, as well as the newly described biovar VI of P. fluorescens, made up 55% and 20% respectively, of the field strains; two % were allocated to P. fluorescens biovar I and three % to biovar IV. Eleven % of the root associated strains were designated P. putida; six strains were biovar A, three strains biovar B while four strains could not be referred to any known biovar. The continuum within the P. fluorescens/P. putida-complex as well as the taxonomic status of the six biovars of P. fluorescens and the three biovars of P. putida are discussed.

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Authors and Affiliations

  1. Department of Applied Microbiology, Chemical Center, University of Lund, P.O. Box 124, S-221 00, Lund, Sweden

    I. -M. Stenström, A. Ternström & G. Molin

  2. Biotechnology Unit, Mardi, 43400 UPM, Serdang, Malaysia

    A. Zakaria

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  1. I. -M. Stenström
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  2. A. Zakaria
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  3. A. Ternström
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  4. G. Molin
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Stenström, I.M., Zakaria, A., Ternström, A. et al. Numerical taxonomy of fluorescent Pseudomonas associated with tomato roots. Antonie van Leeuwenhoek 57, 223–236 (1990). https://doi.org/10.1007/BF00400154

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