- There are plants for which flowering is either quantitatively or qualitatively dependent on exposure to low temperature, this phenomenon is termed vernalisation.
- Vernalisation refers specially to the promotion of flowering by a period of low temperature.
- Some important food plants, wheat, barley, rye have two kinds of varieties: winter and spring varieties.
- The ‘spring’ variety is normally planted in the spring and come to flower and produce grain before the end of the growing season.
- Winter varieties, if planted in spring, would normally fail to flower or produce mature grain within a span of a flowering season.
- Another example of vernalisation is seen in biennial plants, which are monocarpic plants that normally flower and die in the second season.
For example- sugerbeet, cabbages, carrots.