Question

What is devernalization?

Answer 1

Hint: Every plant grows in a particular season in appropriate conditions. Usually, plants need sunlight, water and carbon dioxide to grow, but to bear flowers and fruits they need a particular environment. That is why flowers and food are seasonal.

Complete answer:
Plants bear flowers and fruits. Every plant grows flowers in a particular season of the year. Every flower has a certain temperature and sunlight intensity required to flourish them.
If we want to grow them without their season that means, before their season, we can vernalize them by exposing them to the low temperature. This will also enhance seed production in flowers.
The reversal of this process can be called devernalization. That means when we expose the plants to high temperature, we can delay the flowering in plants and also the seed production. This treatment is brought after cold treatment.
For example- the onion we eat is exposed to low and high temperatures. Before planting onions are made to devernalize to enlarge the bulb, they do not require making flowers.
The vernalization is usually done at the 1-7 degrees Celsius – the chill hours. The period of dormancy is induced in the plants, then the devernalization will recover them from that requisite period.

Note: The vernalization process was discovered by P. chouard. This was done to modify agricultural practices. This was initially known as the chilling treatment. Vernalization and devernalization have greatly helped in the commercial aspects. Gibberellin is the hormone that regulates plant development.