Muséum National d’Histoire Naturelle
Institut de Systématique, Évolution, Biodiversité
ISYEB UMR 7205 CNRS-MNHN-UPMC-EPHE
57 Rue Cuvier - CP39
75005 Paris, France
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Development and Evolution of Plant Architecture
A key aim in biology is to understand the mechanisms underpinning the evolution of form through time. In plants, form diversity mainly results from the varied branching patterns emerging from the coordinated activity of meristems at the shoot tips. An interplay between the hormones auxin, cytokinin and strigolactone, controls branching in flowering plants, a plant lineage that radiated about 150 million years ago. It has recently been evidenced that the same hormonal cues have been independently recruited, and integrated in a distinct manner, to regulate a convergent branch mechanism in mosses, extant representatives of the earliest land plants that evolved more than 400 million years ago.
Therefore, an ancient hormonal interplay provides a fundamental mechanism for branching control in distantly related plant species. However, it is still unknown how the same cues can generate the diversity of branching forms observed in nature.
My team investigates how this ancient hormonal interplay has been remodeled in evolution to generate architectural diversity in plants. We use mosses as model organisms in our research.