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PLANT DISEASE RESISTANCE GENES.

Kim E. Hammond-Kosack1, Jonathan D. G. Jones

  • 1The Sainsbury Laboratory, John Innes Center, Colney Lane, Norwich, Norfolk NR4 7UH, United Kingdom.

Annual Review of Plant Physiology and Plant Molecular Biology
|June 1, 1997
PubMed
Summary

Plant resistance (R) genes and pathogen avirulence (Avr) genes mediate plant-pathogen interactions. Understanding R gene structure and function offers new disease control strategies.

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Area of Science:

  • Plant pathology
  • Molecular genetics
  • Plant immunity

Background:

  • Plant-pathogen interactions often follow a "gene-for-gene" model, requiring plant resistance (R) genes and pathogen avirulence (Avr) genes for incompatibility.
  • R genes are crucial for detecting pathogen molecules, initiating defense signaling, and evolving new specificities.

Purpose of the Study:

  • To investigate the structure and function of plant resistance (R) genes.
  • To understand the evolutionary insights provided by R gene discovery.

Main Methods:

  • Isolation and characterization of plant R genes.
  • Analysis of R gene sequences and their corresponding R gene loci.

Main Results:

  • Four major classes of R gene sequences have been identified.
  • The products of these R genes activate similar plant defense mechanisms.

Conclusions:

  • R gene structure and function provide insights into plant immunity evolution.
  • This knowledge can lead to novel strategies for controlling plant diseases.

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