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Calcium based signalling in guard cells.

Research output: Contribution to journalJournal article

  • Carl K.-Y. Ng
  • Martin McAinsh
  • Julie E. Gray
  • Lee Hunt
  • Callum P. Leckie
  • Lewis Mills
  • Alistair M. Hetherington
<mark>Journal publication date</mark>07/2001
<mark>Journal</mark>New Phytologist
Issue number1
Number of pages12
Pages (from-to)109-120
<mark>Original language</mark>English


Calcium is a ubiquitous intracellular signal responsible for controlling numerous cellular processes in both plants and animals. As an example, Ca2+ has been shown to be a second messenger in the signal transduction pathways by which stomatal guard cells respond to external stimuli. Regulated increases in the cytosolic concentration of free calcium ions ([Ca2+]cyt) in guard cells have been observed to be a common intermediate in many of the pathways leading to either opening or closing of the stomatal pore. This observation has prompted investigations into how specificity is encoded in the Ca2+ signal. It has been suggested that the key to generating stimulus-specific calcium signatures lies in the ability to access differentially the cellular machinery controlling calcium influx and release from intracellular stores. Several important components of the calcium-based signalling pathways have been identified in guard cells including cADPR, phospholipase C–InsP3, InsP6 and H2O2. These data suggest that the pathways for intracellular mobilization of Ca2+ are evolutionarily conserved between plants and animals.