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Russian Journal of Plant Physiology

, Volume 50, Issue 2, pp 220–223 | Cite as

Plasma Membrane Receptors for Exopolysaccharides of the Ring Rot Causal Agent in Potato Cells

  • T. N. Shafikova
  • A. S. Romanenko
  • G. B. Borovskii
Article
  • 44 Downloads

Abstract

By means of differential centrifugation, microsomal fractions enriched in the plasma membrane were isolated from suspension cell cultures of two cultivars of potato (Solanum tuberosum L.) contrasting in their resistance to the causal agent of ring rot (Clavibacter michiganensis subsp. sepedonicus) (Cms). Electrophoresis of the fractions showed that they comprised a wide range of proteins from 15 to 75 kD. The protein bands were more brightly expressed in the microsomal membranes of the cells of susceptible cultivar. The proteins of 70 and 42 kD were present only in the cellular membranes of the resistant cultivar. In order to visualize the binding of exopolysaccharides (EPS) produced by Cms to the receptors of membrane fractions, a conjugate of EPS with a fluorescent marker was used. The membrane fraction isolated from the cells of the susceptible cultivar was found to be richer in receptors for EPS Cms than the membrane fraction from the resistant cultivar. It is supposed that numerous receptors for EPS present on the plasma membrane may partially account for potato susceptibility to Cms. These receptors may facilitate the binding of bacteria to the plant cells, the formation of colonies, and the development of the disease.

Solanum tuberosum Clavibacter michiganensis subsp. sepedonicus pathogenesis plasma membrane receptors resistance exopolysaccharides 

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Copyright information

© MAIK “Nauka/Interperiodica” 2003

Authors and Affiliations

  • T. N. Shafikova
    • 1
  • A. S. Romanenko
    • 1
  • G. B. Borovskii
    • 1
  1. 1.Siberian Institute of Plant Physiology and Biochemistry, iberian DivisionRussian Academy of SciencesIrkutskRussia

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