A recombinant plant natriuretic peptide causes rapid and spatially differentiated K+, Na+ and H+ flux changes in Arabidopsis thaliana roots

Ndiko Ludidi, Monique Morse, Muhammed Sayed, Timothy Wherrett, Sergey Shabala, Christoph Gehring*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


Plant natriuretic peptides (PNPs) belong to a novel class of systemically mobile molecules that are structurally similar to the N-terminal domain of expansins and affect physiological processes such as protoplast volume regulation at nano-molar concentrations. Here we demonstrate that AtPNP-A, a recombinant Arabidopsis thaliana PNP causes rapid H+ influx in the elongation zone of A. thaliana roots but not in the mature zone. AtPNP-A also induces significant K+ and Na+ efflux and this effect is seen in the mature root zone only. These observations suggest that responses to AtPNP-A are developmental stage and tissue specific and point to a complex role in plant growth and homeostasis.

Original languageEnglish (US)
Pages (from-to)1093-1098
Number of pages6
JournalPlant and Cell Physiology
Issue number8
StatePublished - Jan 1 2004


  • Arabidopsis thaliana
  • Expansin
  • Homeostasis
  • Ion flux
  • Plant natriuretic peptide

ASJC Scopus subject areas

  • Physiology
  • Plant Science
  • Cell Biology

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