Q. Assertion : Vernalisation is the promotion of flowering by a period of low temperature.
Reason : It prevents precocious reproductive development late in the growing season.

 2321  231 Plant Growth and Development Report Error

Solution:

There are plants for which flowering is either quantitatively or qualitatively dependent on exposure to low temperature. This treatment is termed as vernalisation. It prevents precocious reproductive development late in the growing season, and enables the plant to have sufficient time to reach maturity.