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SUMMARY:“Powers of two (flagella)" - Kirsty Wan (DAMTP)
DTSTART:20150528T110000Z
DTEND:20150528T120000Z
UID:TALK59276@talks.cam.ac.uk
CONTACT:Salvatore Tesoro
DESCRIPTION:Aqueous environments\, with which we are familiar\, such as pu
 ddles\, rivers\, ponds\, and oceans\, are teeming with microorganisms. Oft
 en propulsion is generated by the vigorous beating dynamics of organelles 
 known as cilia and flagella. Like microscopic analogues of limbs\, these o
 ften come in pairs. The twin anterior flagella of the tiny alga Chlamydomo
 nas reinhardtii executes a bilateral breaststroke when actuated synchronou
 sly\, but when this bilateral symmetry is broken\, they are also capable o
 f turning the cell. The latter phenomenon underlies tactic reorientation\,
  which brings cells closer to sources of light or nutrients. The phylogene
 tic lineage to which Chlamydomonas belongs also includes the large spheric
 al alga Volvox carteri: adult colonies possess dense coverings of biflagel
 late somatic cells whose flagellar beating exhibits remarkable spatiotempo
 ral coherence\, much like the cilia in our lungs or metachronal waves in a
  football stadium. From the few to the many\, what are the strategies devi
 sed by these cilia and flagella to coordinate their beating in the absence
  of a brain or semblance of a nervous system? 
LOCATION:TCM Seminar room\, 530 Mott building
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