The synthesis of alpha -amylase, for example, is induced by seed germination. Transcription inhibitors like chloramphenicol do not influence the increase in activity. Consequently has the enzyme or its mRNA already to be present during germination. Other enzymes like alpha -amylase turn up much later. They develop into organs, in which cells combined in tissues specialize even further.
Germination does thus start at the most favourable time of the growing season.
It interrupts seed dormancy. In such areas exist species whose seeds start to germinate only after a certain threshold of rain days has been reached. The ones that germinate early use every rainy day for their development while those with a higher threshold value wait for possible better times. In dormant seeds occurs no DNA replication and protein biosynthesis works at a hardly detectable level. The synthesis rate of nucleic acids and proteins rises rapidly, the activity of the required enzymes changes dramatically and after exposure of the shoot bud to light begins the synthesis of chlorophyll.