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Updated: Aug 15, 2026

Long-term, High-resolution Confocal Time Lapse Imaging of Arabidopsis Cotyledon Epidermis during Germination
Published on: December 31, 2012
Cell polarity, auxin transport, and cytoskeleton-mediated division planes: who comes first?
Pankaj Dhonukshe1, Jürgen Kleine-Vehn, Jiri Friml
1Zentrum für Molekularbiologie der Pflanzen, Universität Tübingen, Tübingen, Federal Republic of Germany. pankaj.dhonukshe@zmbp.uni-tuebingen.de
Abstract:
In plants, cell polarity is an issue more recurring than in other systems, because plants, due to their adaptive and flexible development, often change cell polarity postembryonically according to intrinsic cues and demands of the environment. Recent findings on the directional movement of the plant signalling molecule auxin provide a unique connection between individual cell polarity and the establishment of polarity at the tissue, organ, and whole-plant levels. Decisions about the subcellular polar targeting of PIN auxin transport components determine the direction of auxin flow between cells and consequently mediate multiple developmental events. In addition, mutations or chemical interference with PIN-based auxin transport result in abnormal cell divisions. Thus, the complicated links between cell polarity establishment, auxin transport, cytoskeleton, and oriented cell divisions now begin to emerge. Here we review the available literature on the issues of cell polarity in both plants and animals to extend our understanding on the generation, maintenance, and transmission of cell polarity in plants.
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