Jeudi 8 Décembre
Résumé :
One of the most fundamental issues in biology is the nature of evolutionary
transitions from single cell organisms to multicellular ones. Not surprisingly for
microscopic life in a fluid environment, many of the processes involved are related to
transport and locomotion, for efficient exchange of chemical species with the environment
is one of the most basic features of life. This is particularly so in the case of
flagellated eukaryotes such as green algae, whose members serve as model organisms
for the study of transitions to multicellularity. In this talk I will summarize recent
theoretical and experimental work addressing a number of interrelated aspects of
evolutionary transitions in the Volvocine green algae, which range from unicellular
Chlamydomonas to Volvox, with thousands of cells. Phenomena to be discussed include
allometry of nutrient uptake, phenotypic plasticity,
flagellar synchronization,
hydrodynamic bound states, and the dynamics of adaptive phototaxis.
RECRUTEMENT ACCES DIRECT
Le département de physique
Fête de la Science 2018 