= Vernalization
<Vernalization> is acquisition of the capacity to <flower> following prolonged cold. In <Arabidopsis thaliana>, persistent silencing of the floral repressor <FLC> helps retain information about winter after temperatures rise.
The memory's lifetime differs from its acquisition. Experiments on resetting between generations show why an individual <plant> can remember cold while its descendants still need their own cold exposure. Perennial <plants> can use different seasonal reactivation patterns, as illustrated by <PEP1> in <Arabis alpina>.<Epigenetic reprogramming that prevents transgenerational inheritance of the vernalized state by Pedro Crevillén and others>[2014, resetting of vernalization memory]{ref}<PEP1 regulates perennial flowering in Arabis alpina by Renhou Wang and others>[2009, seasonal flowering]{ref}
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