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Plant Molecular Biology

, Volume 44, Issue 3, pp 371–385 | Cite as

Regulators of cell death in disease resistance

  • Ken Shirasu
  • Paul Schulze-Lefert
Article

Abstract

Cell death and disease resistance are intimately connected in plants. Plant disease resistance genes (R genes) are key components in pathogen perception and have a potential to activate cell death pathways. Analysis of R proteins suggests common molecular mechanisms for pathogen recognition and signal emission whereas the subsequent signalling unexpectedly involves a network of pathways of parallel, branching and converging action. Disease resistance signalling mutants have revealed novel types of regulatory proteins whose biochemical functions are still unknown. Accumulation of small molecules such as salicylic acid, reactive oxygen intermediates, and nitric oxide amplifies resistance responses and directs cells to initiate cell death programs. Genetic analyses of lesion mimic mutants provide a glimpse of how cell death thresholds are set via an interplay of positive and negative regulatory components.

hypersensitive response lesion mimic programmed cell death R gene reactive oxygen intermediates 

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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Ken Shirasu
    • 1
  • Paul Schulze-Lefert
    • 1
  1. 1.The Sainsbury LaboratoryJohn Innes CentreNorwichUK

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