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Keywords:

  • calcium;
  • elicitor;
  • pathogen;
  • plant defence;
  • calcium signatures;
  • calcium targets

Contents

  • I. 
    Introduction 250
  • II. 
    Increases in free cellular [Ca2+]: an early and key event in plant defence signalling 251
  • III. 
    Relationships between [Ca2+]cyt increases and defence-signalling pathways 256
  • IV. 
    Calcium targets involved in plant defence reactions 258
  • V. 
    Concluding remarks 262
  • Acknowledgements 263

  • References 263

Summary

In plant cells, the calcium ion is a ubiquitous intracellular second messenger involved in numerous signalling pathways. Variations in the cytosolic concentration of Ca2+ ([Ca2+]cyt) couple a large array of signals and responses. Here we concentrate on calcium signalling in plant defence responses, particularly on the generation of the calcium signal and downstream calcium-dependent events participating in the establishment of defence responses with special reference to calcium-binding proteins.