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; Chris Gehring

doi:10.1093/pcp/pch113

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, Chris Gehring^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	1093-1098
Number of pages	6
Journal	Plant and Cell Physiology
Volume	45
Issue number	8
DOIs	https://doi.org/10.1093/pcp/pch113
State	Published - Aug 2004
Externally published	Yes

Bibliographical note

Funding Information:
This project was supported by the National Research Foundation of South Africa, the Australian Research Council and the Royal Society (U.K.).

Keywords

Arabidopsis thaliana
Expansin
Homeostasis
Ion flux
Plant natriuretic peptide

ASJC Scopus subject areas

Physiology
Plant Science
Cell Biology

Access to Document

10.1093/pcp/pch113

Cite this

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

abstract = "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.",

keywords = "Arabidopsis thaliana, Expansin, Homeostasis, Ion flux, Plant natriuretic peptide",

author = "Ndiko Ludidi and Monique Morse and Muhammed Sayed and Timothy Wherrett and Sergey Shabala and Chris Gehring",

note = "Funding Information: This project was supported by the National Research Foundation of South Africa, the Australian Research Council and the Royal Society (U.K.).",

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AU - Ludidi, Ndiko

AU - Morse, Monique

AU - Sayed, Muhammed

AU - Wherrett, Timothy

AU - Shabala, Sergey

AU - Gehring, Chris

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AB - 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.

KW - Arabidopsis thaliana

KW - Expansin

KW - Homeostasis

KW - Ion flux

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