Root Growth Adaptation is Mediated by PYLs ABA Receptor‐PP2A Protein Phosphatase Complex
Abstract: Plant root architecture dynamically adapts to various environmental conditions, such as salt‐containing soil. The phytohormone abscisic acid (ABA) is involved among others also in these developmental adaptations, but the underlying molecular mechanism remains elusive. Here, a novel branch of the ABA signaling pathway in Arabidopsis involving PYR/PYL/RCAR (abbreviated as PYLs) receptor‐protein phosphatase 2A (PP2A) complex that acts in parallel to the canonical PYLs‐protein phosphatase 2C (PP2C) mechanism is identified. The PYLs‐PP2A signaling modulates root gravitropism and lateral root formation through regulating phytohormone auxin transport. In optimal conditions, PYLs ABA receptor interacts with the catalytic subunits of PP2A, increasing their phosphatase activity and thus counteracting PINOID (PID) kinase‐mediated phosphorylation of PIN‐FORMED (PIN) auxin transporters. By contrast, in salt and osmotic stress conditions, ABA binds to PYLs, inhibiting the PP2A activity, which leads to increased PIN phosphorylation and consequently modulated directional auxin transport leading to adapted root architecture. This work reveals an adaptive mechanism that may flexibly adjust plant root growth to withstand saline and osmotic stresses. It occurs via the cross‐talk between the stress hormone ABA and the versatile developmental regulator auxin.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Root Growth Adaptation is Mediated by PYLs ABA Receptor‐PP2A Protein Phosphatase Complex ; volume:7 ; number:3 ; year:2020 ; extent:13
Advanced science ; 7, Heft 3 (2020) (gesamt 13)
- Creator
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Li, Yang
Wang, Yaping
Tan, Shutang
Li, Zhen
Yuan, Zhi
Glanc, Matouš
Domjan, David
Wang, Kai
Xuan, Wei
Guo, Yan
Gong, Zhizhong
Friml, Jiří
Zhang, Jing
- DOI
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10.1002/advs.201901455
- URN
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urn:nbn:de:101:1-2022062310493781545802
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:31 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Li, Yang
- Wang, Yaping
- Tan, Shutang
- Li, Zhen
- Yuan, Zhi
- Glanc, Matouš
- Domjan, David
- Wang, Kai
- Xuan, Wei
- Guo, Yan
- Gong, Zhizhong
- Friml, Jiří
- Zhang, Jing