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SUMMARY:The role of polar auxin transport in bud activation - Martin Van R
 ongen (Leyser Lab)
DTSTART:20140425T123000Z
DTEND:20140425T125500Z
UID:TALK51398@talks.cam.ac.uk
CONTACT:Megan Cooper
DESCRIPTION:Shoot branching in plants is a highly plastic trait\, enabling
  them to adjust to changing environmental conditions. While growth of the 
 primary axis occurs through activity of the shoot apical meristem at the p
 rimary shoot apex\, secondary axes arise through outgrowth of axillary bud
 s. This in turn depends on the activity of axillary shoot apical meristems
 . In many plants\, including Arabidopsis thaliana\, the primary shoot apex
  is able to impose dormancy on axillary buds\, an effect that has long bee
 n attributed to the plant hormone auxin\, exported from the primary apex a
 nd transported down the main stem. The transport of auxin is facilitated t
 hrough specialised efflux carriers\, called PIN-FORMED (PIN) proteins\, al
 lowing polar movement of auxin throughout the plant. Auxin positively regu
 lates its own transport through these transporters and movement from an au
 xin source to an auxin sink results in a progressive narrowing of its tran
 sport stream\, a process called canalisation. For buds to activate\, we hy
 pothesise that they need to be able to export their auxin and that this ex
 port is dependent on canalisation of auxin transport from the bud to the m
 ain stem. Here I present several experiments aimed at investigating how au
 xin transport canalisation between the axillary shoot apex and the main st
 em may play a role in bud activation.
LOCATION:Department of Plant Sciences\, Large Lecture Theatre
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