Signals and Defense Responses Associated with the Race-Cultivar Specific Interaction Between Tobacco and Phytophthora Parasitica Nicotianae

  • M. T. Esquerré-Tugayé
  • J. Fournier
  • M. Rickauer
  • M. L. Pouénat
Conference paper
Part of the NATO ASI Series book series (ASIH, volume 36)

Abstract

Cell surface interactions between plants and pathogens induce defense responses in plants. In the past twenty years, it has been established that cell wall fragments of either pathogen or plant origin have the ability to induce the same defense reactions as pathogen attack. Such fragments, also called elicitors, are supposed to be among the earliest signals of the interaction (Darvill and Albersheim 1984). Distinct classes of elicitors (oligosaccharides, glycans, glycopeptides, peptides, lipids) have thus been identified. Similarly, a wide array of defense responses has been characterized, and several relevant genes and products isolated (Collinge and Slusarenko 1987). Despite such advances, our knowledge of transduction events leading from elicitor or pathogen recognition to defense gene expression remains scanty. Understanding signal transduction pathways requires the availability of model systems on which cellular and molecular approaches can be performed. The tobacco-Phytophthora parasitica nicotianae system is presented in this paper. A biochemical study of host responses, possibly related to signal processing in this system, is then reported.

Keywords

Lipase Trypsin Methionine Oligosaccharide Hydroperoxide 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1989

Authors and Affiliations

  • M. T. Esquerré-Tugayé
    • 1
  • J. Fournier
    • 1
  • M. Rickauer
    • 1
  • M. L. Pouénat
    • 1
  1. 1.Centre de Physiologie VégétaleUniversité Paul SabatierToulouse cédexFrance

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