Rules and self-organizing properties of post-embryonic plant organ cell division patterns

• Verfasst von: Wangenheim, Daniel von [VerfasserIn]
• Verfasst von: Fangerau, Jens [VerfasserIn]
• Verfasst von: Leitte, Heike [VerfasserIn]
• Verfasst von: Maizel, Alexis [VerfasserIn]
• Titel: Rules and self-organizing properties of post-embryonic plant organ cell division patterns
• Verf.angabe: Daniel von Wangenheim, Jens Fangerau, Alexander Schmitz, Richard S. Smith, Heike Leitte, Ernst H. K. Stelzer, and Alexis Maizel
• E-Jahr: 2016
• Jahr: January 28, 2016
• Umfang: 11 S.
• Fussnoten: Gesehen am 04.05.2017
• Titel Quelle: Enthalten in: Current biology
• Ort Quelle: London : Current Biology Ltd., 1991
• Jahr Quelle: 2016
• Band/Heft Quelle: 26(2016), 4, Seite 439-449
• ISSN Quelle: 1879-0445
• DOI: doi:10.1016/j.cub.2015.12.047
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1557909180

Abstract

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.