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SUMMARY:Submerged by 4-way junctions: how the early embryo of the brown al
 ga Saccharina e-copes     - Bénédicte Charrier    
DTSTART:20221031T143000Z
DTEND:20221031T153000Z
UID:TALK183116@talks.cam.ac.uk
CONTACT:Elena Scarpa
DESCRIPTION:Saccharina is a brown marine alga (kelp) that develops a pea
 r-shaped monolayered cell sheet during embryogenesis. Notably\, this sha
 pe is maintained throughout embryogenesis and\, within the sheet\, the c
 ells are cuboids arranged in a grid\, resulting in the so-called 4-way jun
 ctions pattern. Interestingly\, this tissue pattern has been described a
 s rare and unstable in land plants (Thompson\, 1942\; Lloyd\, 1991) wher
 eas it is commonly observed in kelp embryos  (Sauvageau\, 1918). \n\nU
 sing a 2D-vertex mechanical model\, we have studied the cellular parameter
 s that underlie the formation of this grid during growth\, while maintai
 ning the initial shape of the embryo. I will show the extent to which 
 Saccharina must control these parameters\, especially under stochastic
  conditions aimed to reflect real-life fluctuations in cell turgor and i
 n cell division time\, position and orientation. In particular\, I will 
 assess the extent to which this model can account for the diversity of s
 hapes observed in living algal embryos. 
LOCATION:Online
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