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Fibonacci phyllotaxis in plants and algae, a biological convergence with a physical origin

Presented by: 
Yves Couder Laboratoire Matière et Systèmes Complexes
Thursday 21st September 2017 - 09:40 to 10:20
INI Seminar Room 1
Plants and brown algae do not belong to the same lineage. Phylogenetic analysis demonstrates that the divergence between these two clades occurred approximately 1800 million years ago. Their most recent common ancestors were unicellular eukaryotic organisms and the transition to multi-cellularity occurred independently in the two lineages. It is therefore remarkable that similar global morphologies can be observed in both clades. The role of physical laws and evolution in these convergences will be discussed using the Fibonacci spiral organization as a test case. 
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University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons