Mechanisms of age-dependent response to winter temperature in perennial flowering of Arabis alpina.

@article{Bergonzi2013MechanismsOA,
  title={Mechanisms of age-dependent response to winter temperature in perennial flowering of Arabis alpina.},
  author={Sara Bergonzi and Maria C Albani and Emiel Ver Loren van Themaat and Karl J. V. Nordstr{\"o}m and Renhou Wang and Korbinian Schneeberger and Perry D. Moerland and George Coupland},
  journal={Science},
  year={2013},
  volume={340 6136},
  pages={1094-7}
}
Perennial plants live for more than 1 year and flower only after an extended vegetative phase. We used Arabis alpina, a perennial relative of annual Arabidopsis thaliana, to study how increasing age and exposure to winter cold (vernalization) coordinate to establish competence to flower. We show that the APETALA2 transcription factor, a target of microRNA miR172, prevents flowering before vernalization. Additionally, miR156 levels decline as A. alpina ages, causing increased production of SPL… CONTINUE READING
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