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GORK channel: a master switch of plant metabolism?

Adem, GD, Chen, G, Shabala, L ORCID: 0000-0002-5360-8496, Chen, Z-H and Shabala, S ORCID: 0000-0003-2345-8981 2020 , 'GORK channel: a master switch of plant metabolism?' , Trends in Plant Science, vol. 25, no. 5 , pp. 434-445 , doi: 10.1016/j.tplants.2019.12.012.

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Potassium regulates a plethora of metabolic and developmental response in plants, and upon exposure to biotic and abiotic stresses a substantial K+ loss occurs from plant cells. The outward-rectifying potassium efflux GORK channels are central to this stress-induced K+ loss from the cytosol. In the mammalian systems, signaling molecules such as gamma-aminobutyric acid, G-proteins, ATP, inositol, and protein phosphatases were shown to operate as ligands controlling many K+ efflux channels. Here we present the evidence that the same molecules may also regulate GORK channels in plants. This mechanism enables operation of the GORK channels as a master switch of the cell metabolism, thus adjusting intracellular K+ homeostasis to altered environmental conditions, to maximize plant adaptive potential.

Item Type: Article
Authors/Creators:Adem, GD and Chen, G and Shabala, L and Chen, Z-H and Shabala, S
Keywords: GORK, potassium, ligand gating, regulation, ion channel
Journal or Publication Title: Trends in Plant Science
Publisher: Elsevier Science London
ISSN: 1360-1385
DOI / ID Number: 10.1016/j.tplants.2019.12.012
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© 2019 Elsevier Ltd. All rights reserved.

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