Germination is a crucial stage in the life of a plant, as it will leave the stage of seed resistant to various environmental constraints (climatic conditions, absence of nutritive elements, etc.) to become a seedling that is much more vulnerable. The survival of the young plant depends on the timing of this transition. It is therefore essential that this stage be finely controlled.
Click here for original story, An internal thermometer tells seeds when to germinate, researchers find
Source: Phys.org