PATHOGENIC DIFFERENTIATION OF SOFT ROT ERWINIA POTATO PARASITES

Soft rot Erwinia was isolated from diseased potato stems and tubers originating from different potatoes growing areas in Yugoslavia.
The diseased material showed symptoms of brown or black stem rot and tuber soft rot.
Recent research results indicated that such symptoms could be caused by Erwinia carotovora subsp. carotovora (Jones) Bergey, et al., Erwinia carotovora subsp. atroseptica (van Hall) Dye and Erwinia chrysanthemi Burkholder, et al. In order to determine which of those bacteria is responsible for the symptoms observed, 14 bacterial strains were tested.
Apart from their bacteriological characteristics we furthermore carried out a detailed investigation of their pathogenic features.
For this investigation, plants or their parts of 16 plant species were artificially inoculated with isolated bacteria.

According to the obtained results, our strains possess a wide host range.
Besides some pathogenic characteristics that they had in common, also some differences were noticed.
However, this pathogenic differentiation could not be used as a criterion for subspecies determination by itself.

I Balkan Symposium On Vegetables and Potatoes

A. Obradovic, M. Arsenijevic

Erwinia carotovora subsp. carotovora, Erwinia carotovora subsp. atroseptica, pathogenicity, host range, blackleg, soft rot

https://doi.org/10.17660/ActaHortic.1997.462.51