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A Conserved Molecular Framework for Compound Leaf Development

Abstract : Diversity in leaf shape is produced by alterations of the margin: for example, deep dissection leads to leaflet formation and less-pronounced incision results in serrations or lobes. By combining gene silencing and mutant analyses in four distantly related eudicot species, we show that reducing the function of NAM/CUC boundary genes (NO APICAL MERISTEM and CUP-SHAPED COTYLEDON) leads to a suppression of all marginal outgrowths and to fewer and fused leaflets. We propose that NAM/CUC genes promote formation of a boundary domain that delimits leaflets. This domain has a dual role promoting leaflet separation locally and leaflet formation at distance. In this manner, boundaries of compound leaves resemble boundaries functioning during animal development.
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Submitted on : Friday, August 2, 2019 - 6:47:07 PM
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Thomas T. Blein, Amada Pulido, Aurélie Vialette-Guiraud, Krisztina Nikovics, Halima H. Morin, et al.. A Conserved Molecular Framework for Compound Leaf Development. Science, American Association for the Advancement of Science (AAAS), 2008, 322 (5909), pp.1835-1839. ⟨10.1126/science.1166168⟩. ⟨hal-02263093⟩



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