Post-embryonic Hourglass Patterns Mark Ontogenetic Transitions in Plant Development

Drost, Hajk-Georg, Bellstaedt, Julia, O'Maoileidigh, Diarmuid S, Silva, Anderson T, Gabel, Alexander, Weinholdt, Claus, Ryan, Patrick T, Dekkers, Bas JW, Bentsink, Leonie, Hilhorst, Henk WM
et al (show 4 more authors) (2016) Post-embryonic Hourglass Patterns Mark Ontogenetic Transitions in Plant Development. Molecular Biology and Evolution, 33 (5). 1158 - 1163.

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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.

Item Type: Article
Uncontrolled Keywords: developmental hourglass, plant development, transcriptomics, germination, floral transition
Depositing User: Symplectic Admin
Date Deposited: 28 Feb 2019 09:45
Last Modified: 06 Sep 2022 07:30
DOI: 10.1093/molbev/msw039
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