Rules and self-organizing properties of post-embryonic plant organ cell division patterns
Summary Plants form new organs with patterned tissue organization throughout their lifespan. It is unknown whether this robust post-embryonic organ formation results from stereotypic dynamic processes, in which the arrangement of cells follows rigid rules. Here, we combine modeling with empirical ob...
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| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
January 28, 2016
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| In: |
Current biology
Year: 2016, Jahrgang: 26, Heft: 4, Pages: 439-449 |
| ISSN: | 1879-0445 |
| DOI: | 10.1016/j.cub.2015.12.047 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1016/j.cub.2015.12.047 Verlag, kostenfrei, Volltext: http://www.sciencedirect.com/science/article/pii/S096098221501578X 
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| Verfasserangaben: | Daniel von Wangenheim, Jens Fangerau, Alexander Schmitz, Richard S. Smith, Heike Leitte, Ernst H. K. Stelzer, and Alexis Maizel |
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| 520 | |a Summary Plants form new organs with patterned tissue organization throughout their lifespan. It is unknown whether this robust post-embryonic organ formation results from stereotypic dynamic processes, in which the arrangement of cells follows rigid rules. Here, we combine modeling with empirical observations of whole-organ development to identify the principles governing lateral root formation in Arabidopsis. Lateral roots derive from a small pool of founder cells in which some take a dominant role as seen by lineage tracing. The first division of the founders is asymmetric, tightly regulated, and determines the formation of a layered structure. Whereas the pattern of subsequent cell divisions is not stereotypic between different samples, it is characterized by a regular switch in division plane orientation. This switch is also necessary for the appearance of patterned layers as a result of the apical growth of the primordium. Our data suggest that lateral root morphogenesis is based on a limited set of rules. They determine cell growth and division orientation. The organ-level coupling of the cell behavior ensures the emergence of the lateral root’s characteristic features. We propose that self-organizing, non-deterministic modes of development account for the robustness of plant organ morphogenesis. | ||
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