Post-embryonic Hourglass Patterns Mark Ontogenetic Transitions in Plant Development

Molecular Biology and Evolution
Hajk-Georg DrostMarcel Quint

Abstract

The historic developmental hourglass concept depicts the convergence of animal embryos to a common form during the phylotypic period. Recently, it has been shown that a transcriptomic hourglass is associated with this morphological pattern, consistent with the idea of underlying selective constraints due to intense molecular interactions during body plan establishment. Although plants do not exhibit a morphological hourglass during embryogenesis, a transcriptomic hourglass has nevertheless been identified in the model plant Arabidopsis thaliana Here, we investigated whether plant hourglass patterns are also found postembryonically. We found that the two main phase changes during the life cycle of Arabidopsis, from embryonic to vegetative and from vegetative to reproductive development, are associated with transcriptomic hourglass patterns. In contrast, flower development, a process dominated by organ formation, is not. This suggests that plant hourglass patterns are decoupled from organogenesis and body plan establishment. Instead, they may reflect general transitions through organizational checkpoints.

References

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Dec 4, 2014·Development·Naoki Irie, Shigeru Kuratani
Jan 30, 2015·Molecular Biology and Evolution·Hajk-Georg DrostMarcel Quint
Mar 1, 2015·Molecular Biology and Evolution·Xuanjin ChengHoi Shan Kwan

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Citations

Aug 10, 2017·Scientific Reports·Li LeiChristopher Toomajian
Sep 28, 2021·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Michael K Richardson
Sep 26, 2021·The Plant Journal : for Cell and Molecular Biology·Thomas Depuydt, Klaas Vandepoele
Sep 29, 2021·Molecular Biology and Evolution·Guihua JinDe-Zhu Li
Feb 3, 2022·Biological Reviews of the Cambridge Philosophical Society·Michael K Richardson, Gerhard Keuck

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