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SUMMARY:CANCELLED: Circadian regulation of sunflower development - Profess
 or Stacey Harmer\, UC Davies\, USA
DTSTART:20230223T121500Z
DTEND:20230223T134500Z
UID:TALK194692@talks.cam.ac.uk
CONTACT:Jake Harris
DESCRIPTION:This talk has unfortunately been cancelled. We will look to re
 arrange for a later date.\n\nPlants display a remarkable degree of plastic
 ity\, altering their growth and development in response to an array of env
 ironmental cues. We use domesticated sunflower as a model to investigate h
 ow this plasticity is modified by the circadian system. Domesticated sunfl
 ower is well-known for its heliotropic behavior\, with stems bending to fo
 llow the sun from east to west during the day and then bending from west t
 o east during the night so they face east before the sun rises in the morn
 ing. Sunflowers are also famous for the remarkable spiral arrangement of f
 lorets on their composite inflorescences\, a pattern imposed early in deve
 lopment.  It is less recognized that during late-stage floral development 
 this spiral pattern is transformed into one of concentric rings. We find t
 hat both solar tracking of stems and spatial patterns seen in late-stage f
 loral development are generated by interactions between the circadian syst
 em and environmental signaling pathways and demonstrate the importance of 
 this coordination for plant reproductive fitness.
LOCATION:CANCELLED
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