Variability of aggressiveness and virulence of Erwinia carotovora subsp. carotovorum causing the soft rot on potato tubers in the western of Algeria


https://doi.org/10.4081/pb.2018.7568
Vol. 9 No. 1 (2018)
Submitted: 7 January 2018
Accepted: 20 March 2018
Published: 21 December 2018
Solanum tuberosum; Erwinia carotovora; soft rot; sensitivity; virulence; pathogenicity.
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Authors

  • M’hamed Benada
    mbenada@yahoo.fr
    Laboratory of Applied Microbiology, Department of Biology, Faculty of Natural and Life Sciences, University Oran 1, Ahmed Ben Bella; Department of Ecology and Environement, University 8 May 1945, Guelma, Algeria.
  • Boualem Boumaaza Department of Ecology and Environement, University 8 May 1945, Guelma; Laboratory of Biology, Water and Environement, University 8 May 1945, Guelma, Algeria.
  • Sofiane Boudalia Department of Ecology and Environement, University 8 May 1945, Guelma; Laboratory of Biology, Water and Environement, University 8 May 1945, Guelma, Algeria.
  • Omar Khaladi Department of Ecology and Environement, University 8 May 1945, Guelm, Algeria.
  • Bettache Guessas Laboratory of Applied Microbiology, Department of Biology, Faculty of Natural and Life Sciences, University Oran 1, Ahmed Ben Bella, Algeria.

Soft rot symptoms were observed on potato plants in several potato cultivars in the western part of Algeria. A total of four strains of Erwinia are devided as follow: i) three strains of bacteria isolated from diseased tissues and soil, identified as Erwinia carotovora subsp carotovorum using conventional bacteriological and biochemical methods; and ii) one strain as Erwinia sp, not pathogens. In vitro tests, on tuber slices were set up to determine slices weight lost, which allows to find differences in cultivar susceptibility and isolate aggressiveness. Among the five cultivars, Laura was the most susceptible than the others tested cultivars. Moreover, it was found that MAI isolate was the most virulent than the other bacterial isolates. The results of this study should allow an optimization of the potato storage, after considering the susceptibility of a given cultivar to soft rot development and the aggressiveness.


Benada, M., Boumaaza, B., Boudalia, S., Khaladi, O., & Guessas, B. (2018). Variability of aggressiveness and virulence of Erwinia carotovora subsp. carotovorum causing the soft rot on potato tubers in the western of Algeria. International Journal of Plant Biology, 9(1). https://doi.org/10.4081/pb.2018.7568

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