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A Recombinant Plant Natriuretic Peptide Causes Rapid and Spatially Differentiated K+, Na+ and H+ Flux Changes in Arabidopsis thaliana Roots
journal contributionposted on 2023-05-16, 15:16 authored by Ludidi, N, Morse, M, Sayed, M, Wherrett, TC, Sergey ShabalaSergey Shabala, Gehring, C
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.
Publication titlePlant and Cell Physiology
Department/SchoolTasmanian Institute of Agriculture (TIA)
PublisherOxford University Press
Place of publicationUnited Kingdom