PID/WAG-mediated phosphorylation of the Arabidopsis PIN3 auxin transporter mediates polarity switches during gravitropism

P. Grones, M.F. Abas, J. Hajny, A. Jones, S. Waidmann, J. Kleine Vehn, J. Friml, Scientific Reports 8 (2018).

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Journal Article | Published | English
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Abstract
Intercellular distribution of the plant hormone auxin largely depends on the polar subcellular distribution of the plasma membrane PIN-FORMED (PIN) auxin transporters. PIN polarity switches in response to different developmental and environmental signals have been shown to redirect auxin fluxes mediating certain developmental responses. PIN phosphorylation at different sites and by different kinases is crucial for PIN function. Here we investigate the role of PIN phosphorylation during gravitropic response. Loss- and gain-of-function mutants in PINOID and related kinases but not in D6PK kinase as well as mutations mimicking constitutive dephosphorylated or phosphorylated status of two clusters of predicted phosphorylation sites partially disrupted PIN3 phosphorylation and caused defects in gravitropic bending in roots and hypocotyls. In particular, they impacted PIN3 polarity rearrangements in response to gravity and during feed-back regulation by auxin itself. Thus PIN phosphorylation, besides regulating transport activity and apical-basal targeting, is also important for the rapid polarity switches in response to environmental and endogenous signals.
Publishing Year
Date Published
2018-07-06
Journal Title
Scientific Reports
Volume
8
Issue
1
Article Number
10279
IST-REx-ID

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Grones P, Abas MF, Hajny J, et al. PID/WAG-mediated phosphorylation of the Arabidopsis PIN3 auxin transporter mediates polarity switches during gravitropism. Scientific Reports. 2018;8(1). doi:10.1038/s41598-018-28188-1
Grones, P., Abas, M. F., Hajny, J., Jones, A., Waidmann, S., Kleine Vehn, J., & Friml, J. (2018). PID/WAG-mediated phosphorylation of the Arabidopsis PIN3 auxin transporter mediates polarity switches during gravitropism. Scientific Reports, 8(1). https://doi.org/10.1038/s41598-018-28188-1
Grones, Peter, Melinda F Abas, Jakub Hajny, Angharad Jones, Sascha Waidmann, Jürgen Kleine Vehn, and Jirí Friml. “PID/WAG-Mediated Phosphorylation of the Arabidopsis PIN3 Auxin Transporter Mediates Polarity Switches during Gravitropism.” Scientific Reports 8, no. 1 (2018). https://doi.org/10.1038/s41598-018-28188-1.
P. Grones et al., “PID/WAG-mediated phosphorylation of the Arabidopsis PIN3 auxin transporter mediates polarity switches during gravitropism,” Scientific Reports, vol. 8, no. 1, 2018.
Grones P, Abas MF, Hajny J, Jones A, Waidmann S, Kleine Vehn J, Friml J. 2018. PID/WAG-mediated phosphorylation of the Arabidopsis PIN3 auxin transporter mediates polarity switches during gravitropism. Scientific Reports. 8(1).
Grones, Peter, et al. “PID/WAG-Mediated Phosphorylation of the Arabidopsis PIN3 Auxin Transporter Mediates Polarity Switches during Gravitropism.” Scientific Reports, vol. 8, no. 1, 10279, Springer, 2018, doi:10.1038/s41598-018-28188-1.
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