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Polyamines prevent NaCl-induced K+ efflux from pea mesophyll by blocking non-selective cation channels

journal contribution
posted on 2023-05-16, 20:27 authored by Sergey ShabalaSergey Shabala, Tracey Cuin, Pottosin, Igor
Despite numerous reports implicating polyamines in plant salinity responses, the specific ionic mechanisms of polyamine-mediated adaptation to salt-stress remain elusive. In this work, we show that micromolar concentrations of polyamines are efficient in preventing NaCl-induced K+ efflux from the leaf mesophyll, and that this effect can be attributed to the inhibition of non-selective cation channels in mesophyll. The inhibition by externally applied polyamines developed slowly over time, suggesting a cytosolic mode of action. Overall, we suggest that elevated levels of cellular polyamine may modulate the activity of plasma membrane ion channels, improving ionic relations and assisting in a plant's adaptation to salinity. © 2007.

History

Publication title

FEBS Letters

Volume

581

Issue

10

Pagination

1993-1999

ISSN

0014-5793

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Elsevier BV

Place of publication

Netherlands

Repository Status

  • Restricted

Socio-economic Objectives

Field grown vegetable crops

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