Circadian regulation of sunflower heliotropism, floral orientation, and pollinator visits

@article{Atamian2016CircadianRO,
  title={Circadian regulation of sunflower heliotropism, floral orientation, and pollinator visits},
  author={Hagop S. Atamian and Nicky M. Creux and Evan A. Brown and Austin G Garner and Benjamin K Blackman and Stacey L Harmer},
  journal={Science},
  year={2016},
  volume={353},
  pages={587-590}
}
Young sunflower plants track the Sun from east to west during the day and then reorient during the night to face east in anticipation of dawn. In contrast, mature plants cease movement with their flower heads facing east. We show that circadian regulation of directional growth pathways accounts for both phenomena and leads to increased vegetative biomass and enhanced pollinator visits to flowers. Solar tracking movements are driven by antiphasic patterns of elongation on the east and west sides… CONTINUE READING
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