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ANR funded project

JCJC - SVSE 7 - Biodiversité, évolution, écologie et agronomie (JCJC SVSE 7)
Edition 2012


MAGNIPHY


Floral evolution in Magnoliidae: an integrated phylogenetic and Evo-Devo approach

Diversification of floral shape: zoom on a key chapter of evolution
Using three complementary approaches (evolutionary relationships, ancestral shape reconstruction, and the study of floral genes), this project aims at better understanding the history and processes of floral evolution in a large group of flowering plants, Magnoliidae

Scientific context and goals of MAGNIPHY
Flowers are the showcase of the evolution of the angiosperms (or flowering plants) and played a key role in their success and diversification. Yet little is known on the evolution of flowers at the scale of angiosperms. The ultimate goal of the proposed project is to produce a new synthesis of floral evolution in Magnoliidae, a large group of 10,000 species that is remarkably diverse in floral structure (incl. magnolias, laurels, black pepper, and pipevines).

Methods implemented in MAGNIPHY
We will: (1) reconstruct a robust, dated phylogeny (evolutionary relationships) of Magnoliidae by combining DNA sequences (271 genera x 12 genes) and the rich fossil record of the group; (2) create a database of floral traits of Magnoliidae and test whether particular floral shapes have significantly favored species diversification; (3) characterize the floral transcriptomes (complete genomes expressed in the flower) of 20 species and determine patterns of expression of known and new floral genes.

Results

n/a

Outlook

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Scientific outputs and patents

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Partners

Université Paris-Sud 11 UMR 8079 Écologie, Systématique, Évolution (ESE)

ANR grant: 250 000 euros
Beginning and duration: janvier 2013 - 48 mois

Submission abstract

Flowers are the showcase of the evolution of the angiosperms (or flowering plants) and played a key role in their success and diversification. Surprisingly, little is known on the evolution of flowers at the scale of angiosperms. This project proposes to investigate floral evolution in Magnoliidae, a large monophyletic group consisting of four orders (Canellales, Laurales, Magnoliales, Piperales) and about 10,000 species. Magnoliidae are remarkably diverse in floral structures in contrast with monocots and eudicots, which appear to have relatively well-conserved floral groundplans. To understand the evolutionary, developmental, and ecological processes responsible for the floral diversity of Magnoliidae, we will: (1) reconstruct a robust, dated phylogeny for the group by combining a deep-sampling approach (271 genera x 12 genes), a phylotranscriptomic approach (20 species), and calibrations from the rich fossil record of the group; (2) create a comprehensive database of floral traits of Magnoliidae combining literature data with new SEM and µCT observations, and test for correlations among floral characters as well as between floral morphology, pollinating vectors, and diversification rates; (3) characterize the floral transcriptomes of 20 species using RNA-Seq and determine patterns of expression of known and new candidate floral genes. Unraveling the history and mechanisms of floral diversification in Magnoliidae will not only shed light on an enigmatic piece of the puzzle of angiosperm evolution, but will also provide invaluable insights into early floral evolution and the origin of monocots and eudicots.

 

ANR Programme: JCJC - SVSE 7 - Biodiversité, évolution, écologie et agronomie (JCJC SVSE 7) 2012

Project ID: ANR-12-JSV7-0015

Project coordinator:
Monsieur Hervé SAUQUET (UMR 8079 Écologie, Systématique, Évolution (ESE))
herve.sauquet@nullgmail.com

 

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The project coordinator is the author of this abstract and is therefore responsible for the content of the summary. The ANR disclaims all responsibility in connection with its content.