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SUMMARY:Symplasmic auxin movement and the evolution of plant architecture 
 - Yoan Coudert
DTSTART:20211122T143000Z
DTEND:20211122T153000Z
UID:TALK162520@talks.cam.ac.uk
CONTACT:100480
DESCRIPTION:The successful colonization of land by plants was accompanied 
 by the diversification of their branching architecture. The phytohormone a
 uxin is a major regulator of branch initiation and has a similar inhibitor
 y role in flowering plants and mosses\, two major land plant lineages that
  diverged from their most recent common ancestor several hundred million y
 ears ago. PIN-mediated polar auxin transport is crucial for auxin function
  in flowering plant branching control. Long-range tropic auxin gradients a
 re sustained locally through the regulation of cell-to-cell connectivity a
 t the level of plasmodesmata\, although this is comparatively a minor path
 way. In the moss Physcomitrella patens\, an extant representative of early
  land plants\, PIN proteins have a minor role in leafy shoot branching con
 trol and the symplasmic pathway could instead represent the main route for
  auxin movement in the stem. Using a combination of developmental genetics
  and computational modeling\, we explore the role of symplasmic fields and
  plasmodesmal gating in auxin movement\, and thereby assess their contribu
 tion to the evolution of plant morphogenesis.
LOCATION:Online
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