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A multiscale analysis of early flower development in Arabidopsis provides an integrated view of molecular regulation and growth control

Abstract : We have analyzed the link between the gene regulation and growth during the early stages of flower development in Arabidopsis. Starting from time-lapse images, we generated a 4D atlas of early flower development, including cell lineage, cellular growth rates, and the expression patterns of regulatory genes. This information was introduced in MorphoNet, a web-based platform. Using computational models, we found that the literature-based molecular network only explained a minority of the gene expression patterns. This was substantially improved by adding regulatory hypotheses for individual genes. Correlating growth with the combinatorial expression of multiple regulators led to a set of hypotheses for the action of individual genes in morphogenesis. This identified the central factor LEAFY as a potential regulator of heterogeneous growth, which was supported by quantifying growth patterns in a leafy mutant. By providing an integrated view, this atlas should represent a fundamental step toward mechanistic models of flower development.
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https://hal.inrae.fr/hal-03299500
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Submitted on : Tuesday, July 27, 2021 - 1:04:14 PM
Last modification on : Thursday, November 4, 2021 - 3:58:02 AM
Long-term archiving on: : Thursday, October 28, 2021 - 6:23:43 PM

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Yassin Refahi, Argyris Zardilis, Gaël Michelin, Raymond Wightman, Bruno Leggio, et al.. A multiscale analysis of early flower development in Arabidopsis provides an integrated view of molecular regulation and growth control. Developmental Cell, Elsevier, 2021, 56 (4), pp.540-556.e8. ⟨10.1016/j.devcel.2021.01.019⟩. ⟨hal-03299500⟩

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