Vernalization
Vernalization teaches that major transitions require multiple validation signals, not just one trigger.
The plant requires both signals: 'winter happened' + 'spring is here' = safe to flower.
Vernalization is a cold-sensing mechanism that ensures flowering only happens after winter is over. Winter wheat requires exposure to cold temperatures (0-10°C) for 4-8 weeks before it can transition to flowering. The mechanism involves epigenetic changes - chemical tags that silence flowering repressor genes accumulate week by week during winter. After sufficient cold exposure, the block is lifted, and when spring brings warmth and long days, flowering genes activate. This is a two-signal system: Signal 1 (cold/vernalization) removes the block, Signal 2 (photoperiod/long days) activates flowering. Both must turn for the door to open.
Business Application of Vernalization
Vernalization teaches that major transitions require multiple validation signals, not just one trigger. Companies should verify both 'winter has passed' (survival of difficult period) and 'spring is here' (favorable conditions ahead) before executing major transitions.
Discovery
Amasino (2004)
Characterized how FLOWERING LOCUS C is epigenetically silenced by prolonged cold exposure