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Phenotypic variability in different strains of Pseudomonas syringae subsp. savastanoi isolated from different hosts

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Abstract

One hundred and sixty strains of Pseudomonas syringae subsp. savastanoi from Olea europaea, Olea europaea var. sylvestris, Nerium oleander, Fraxinus angustifolia and Retama sphaerocarpa, and four type strains of other pathovars were studied, investigating 102 phenotypic traits, among which we include biochemical characteristics, assimilation of different carbon sources, sensitivity or resistance to antibiotics and indoleacetic acid (IAA) production. Results were analysed with an affinity dendrogram via the Jaccard coefficient. They indicate an influence of environmental factors on the formation of the 15 phenons obtained, since isolated (knot) strains from the same species but different geographical areas are segregated. Segregation, also detected in strains from different hosts within the same area, added to the pathogenicity test helps to characterise these strains as different pathovars.

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Authors and Affiliations

  1. Area de Fitopatologí a. Fac. CC. Experimentales y Técnicas, Univ. San Pablo CEU, Crtra, Boadilla del Monte Km. 5,3. Boadilla del Monte, 28660, Madrid, Spain

    F. Alvarez, J.E. García de los Ríos, P. Jimenez, A. Rojas, P. Reche & M.T. Troya

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  1. F. Alvarez
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  2. J.E. García de los Ríos
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  3. P. Jimenez
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  4. A. Rojas
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  5. P. Reche
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  6. M.T. Troya
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Alvarez, F., García de los Ríos, J., Jimenez, P. et al. Phenotypic variability in different strains of Pseudomonas syringae subsp. savastanoi isolated from different hosts. European Journal of Plant Pathology 104, 603–609 (1998). https://doi.org/10.1023/A:1008604011154

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