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PIN2 Polarity Establishment in Arabidopsis in the Absence of an Intact Cytoskeleton
M. Glanc, M. Fendrych, J. Friml,
Language English Country Switzerland
Document type Journal Article, Research Support, Non-U.S. Gov't
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PubMed Central
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Europe PubMed Central
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Health & Medicine (ProQuest)
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PubMed
31181636
DOI
10.3390/biom9060222
Knihovny.cz E-resources
- MeSH
- Arabidopsis cytology metabolism MeSH
- Cytoskeleton metabolism MeSH
- Intracellular Space metabolism MeSH
- Arabidopsis Proteins metabolism MeSH
- Protein Transport MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Cell polarity is crucial for the coordinated development of all multicellular organisms. In plants, this is exemplified by the PIN-FORMED (PIN) efflux carriers of the phytohormone auxin: The polar subcellular localization of the PINs is instructive to the directional intercellular auxin transport, and thus to a plethora of auxin-regulated growth and developmental processes. Despite its importance, the regulation of PIN polar subcellular localization remains poorly understood. Here, we have employed advanced live-cell imaging techniques to study the roles of microtubules and actin microfilaments in the establishment of apical polar localization of PIN2 in the epidermis of the Arabidopsis root meristem. We report that apical PIN2 polarity requires neither intact actin microfilaments nor microtubules, suggesting that the primary spatial cue for polar PIN distribution is likely independent of cytoskeleton-guided endomembrane trafficking.
References provided by Crossref.org
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- $a Glanc, Matouš $u Institute of Science and Technology Austria (IST Austria), 3400 Klosterneuburg, Austria. matous.glanc@psb.vib-ugent.be. Department of Experimental Plant Biology, Faculty of Science, Charles University, 12844 Prague, Czech Republic. matous.glanc@psb.vib-ugent.be.
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- $a Cell polarity is crucial for the coordinated development of all multicellular organisms. In plants, this is exemplified by the PIN-FORMED (PIN) efflux carriers of the phytohormone auxin: The polar subcellular localization of the PINs is instructive to the directional intercellular auxin transport, and thus to a plethora of auxin-regulated growth and developmental processes. Despite its importance, the regulation of PIN polar subcellular localization remains poorly understood. Here, we have employed advanced live-cell imaging techniques to study the roles of microtubules and actin microfilaments in the establishment of apical polar localization of PIN2 in the epidermis of the Arabidopsis root meristem. We report that apical PIN2 polarity requires neither intact actin microfilaments nor microtubules, suggesting that the primary spatial cue for polar PIN distribution is likely independent of cytoskeleton-guided endomembrane trafficking.
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