Flavonol-induced changes in PIN2 polarity and auxin transport in the Arabidopsis thaliana rol1-2 mutant require phosphatase activity

B. Kuhn, T. Nodzyński, S. Errafi, R. Bucher, S. Gupta, B. Aryal, P. Dobrev, L. Bigler, M. Geisler, E. Zažímalová, J. Friml, C. Ringli, Scientific Reports 7 (2017).

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Journal Article | Published | English
Author
Kuhn, Benjamin; Nodzyński, Tomasz; Errafi, Sanae; Bucher, Rahel; Gupta, Shibu; Aryal, Bibek; Dobrev, Petre; Bigler, Laurent; Geisler, Markus; Zažímalová, Eva; Friml, JiríIST Austria ; Ringli, Christoph
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Department
Abstract
The phytohormone auxin is a major determinant and regulatory component important for plant development. Auxin transport between cells is mediated by a complex system of transporters such as AUX1/LAX, PIN, and ABCB proteins, and their localization and activity is thought to be influenced by phosphatases and kinases. Flavonols have been shown to alter auxin transport activity and changes in flavonol accumulation in the Arabidopsis thaliana rol1-2 mutant cause defects in auxin transport and seedling development. A new mutation in ROOTS CURL IN NPA 1 (RCN1), encoding a regulatory subunit of the phosphatase PP2A, was found to suppress the growth defects of rol1-2 without changing the flavonol content. rol1-2 rcn1-3 double mutants show wild type-like auxin transport activity while levels of free auxin are not affected by rcn1-3. In the rol1-2 mutant, PIN2 shows a flavonol-induced basal-to-apical shift in polar localization which is reversed in the rol1-2 rcn1-3 to basal localization. In vivo analysis of PINOID action, a kinase known to influence PIN protein localization in a PP2A-antagonistic manner, revealed a negative impact of flavonols on PINOID activity. Together, these data suggest that flavonols affect auxin transport by modifying the antagonistic kinase/phosphatase equilibrium.
Publishing Year
Date Published
2017-02-06
Journal Title
Scientific Reports
Acknowledgement
European Research Council (project ERC-2011-StG-20101109-PSDP), European Social Fund (CZ.1.07/2.3.00/20.0043) and the Czech Science Foundation (GA13-40637S) [JF].
Volume
7
Article Number
41906
ISSN
IST-REx-ID

Cite this

Kuhn B, Nodzyński T, Errafi S, et al. Flavonol-induced changes in PIN2 polarity and auxin transport in the Arabidopsis thaliana rol1-2 mutant require phosphatase activity. Scientific Reports. 2017;7. doi:10.1038/srep41906
Kuhn, B., Nodzyński, T., Errafi, S., Bucher, R., Gupta, S., Aryal, B., … Ringli, C. (2017). Flavonol-induced changes in PIN2 polarity and auxin transport in the Arabidopsis thaliana rol1-2 mutant require phosphatase activity. Scientific Reports, 7. https://doi.org/10.1038/srep41906
Kuhn, Benjamin, Tomasz Nodzyński, Sanae Errafi, Rahel Bucher, Shibu Gupta, Bibek Aryal, Petre Dobrev, et al. “Flavonol-Induced Changes in PIN2 Polarity and Auxin Transport in the Arabidopsis Thaliana Rol1-2 Mutant Require Phosphatase Activity.” Scientific Reports 7 (2017). https://doi.org/10.1038/srep41906.
B. Kuhn et al., “Flavonol-induced changes in PIN2 polarity and auxin transport in the Arabidopsis thaliana rol1-2 mutant require phosphatase activity,” Scientific Reports, vol. 7, 2017.
Kuhn B, Nodzyński T, Errafi S, Bucher R, Gupta S, Aryal B, Dobrev P, Bigler L, Geisler M, Zažímalová E, Friml J, Ringli C. 2017. Flavonol-induced changes in PIN2 polarity and auxin transport in the Arabidopsis thaliana rol1-2 mutant require phosphatase activity. Scientific Reports. 7, 41906.
Kuhn, Benjamin, et al. “Flavonol-Induced Changes in PIN2 Polarity and Auxin Transport in the Arabidopsis Thaliana Rol1-2 Mutant Require Phosphatase Activity.” Scientific Reports, vol. 7, 41906, Nature Publishing Group, 2017, doi:10.1038/srep41906.
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2018-12-12


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