Vernalization refers to the acceleration of flowering that occurs following prolonged exposure of seeds or young seedlings to low temperatures. Plants that are vernalized do not flower immediately upon exposure to higher temperatures, but often weeks later.

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    Biennial plants require exposure to the cold of winter to overcome a block to flowering in the spring. The molecular role of FRIGIDA, a key component of the system that establishes the cold requirement in Arabidopsis, is to assemble a protein super-complex that promotes expression of a flowering repressor in the autumn.

    • Richard Amasino
    Nature Plants 4, 752-753