abscission :

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  • n  shedding of flowers and leaves and fruit following formation of scar tissue in a plant
  • n  the act of cutting something off

  • Leaf loss happens by a process called abscission, triggered by shortening day length. The plant forms a layer of cells that isolate the leaf from its twig, and where the leaf can readily detach.
  • Abscission is a very complex process and involves sebveral plant hormones.

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