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Differentiate between photoperiodism and vernalisation.

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Photoperiodism 

  • Phenomenon in which the plants respond to relative length of day and night to which they are exposed for flowering is called as photoperiodism. 
  • Site of perception of light for photoperiodism is the leaf where a pigment called phytochrome perceives the light stimulus.
  • Mediated through Florigen.

Vernalisation : 

  • A method of promoting flowering by exposing the young plant to low temperature.
  • Gibberellin acid can replace cold treatment to induce vernalization.
  • Mediated through Vernalin.

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