Serological and biochemical variation among potato strains of Erwinia carotovora subsp. atroseptica and their taxonomic relationship to other E. carotovora strains |
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| Authors: | S H De Boer L Verdonck H Vruggink † P Harju † H O Bång § J De Ley |
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| Institution: | Agriculture Canada Research Station, 6660 N.W. Marine Drive, Vancouver, British Columbia, Canada, V6T 1X2;*Laboratorium voor Microbiologie en Microbiele Genetica, Rijksuniversiteit, K. L. Ledeganckstraat 35, B-9000 Gent, Belgium;?Research Institute for Plant Protection, Binnenhaven 12, Wageningen 6700 AA, The Netherlands;?University of Helsinki, Department of Plant Pathology, 00710 Helsinki, Finland;§Institute for Plant Research and Cold Storage (IVK), PI 7173, S-905 90 Umeå, Sweden |
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| Abstract: | The serological and biochemical characteristics of 32 Erwinia carotovora subsp. atroseptica strains from potato were compared with 48 other pectolytic Erwinia strains. Biochemical characteristics were examined by the API 20E and API 50CHE systems. Numerical analysis using the Euclidean distance coefficients and clustering by the unweighted average pair group method indicated that these E. carotovora subsp. atroseptica strains formed a distinct cluster (subphenon A1) that could be differentiated from other E. carotovora strains. Three non-potato strains also belonged to this group; two of these were from tomato and the other from Chinese cabbage. Named E. carotovora subsp. atroseptica strains from other hosts clustered into other phenons. Sixty-three per cent of subphenon A1 strains tested in this study typed into serogroup I. One potato strain in another phenon also typed into this serogroup. The subphenon A1 strains that did not type into serogroup I typed into serogroups XVIII, XX, or XXII. Many of these strains, however, expressed several different O antigens which were also expressed by E. carotovora strains in other phenons. |
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