The upcoming discussion will update you about the differences between photoperiodism and vernalisation.
Photoperiodism:
1. It is a process of stimulating flower induction by exposing the plants to appropriate photoperiods.
2. It provides both stimulus and induction of flowering.
3. The stimulus is perceived by only the green leaves.
4. The stimulus itself induces flowering.
5. It is mediated through florigen.
6. Exposure to 2 to 3 appropriate photoperiods is enough to induce flowering.
7. Photoperiodic induction cannot be reversed or nullified by exposure to unfavourable photoperiods.
8. Gibberellic acid can replace exposure to long photoperiods in long day plants only,
Vernalisation:
1. It is a process of preparing the plants for perceiving stimulus for flower induction by cold treatment.
2. It only prepares a plant for perceiving the flowering stimulus. It does not induce flowering.
3. The stimulus is perceived by meristems, embryos or leaves.
4. The stimulus itself does not induce flowering. It must be followed by appropriate photoperiod and temperature.
5. It is mediated through vernalin which induces the synthesis of florigen.
6. Exposure to low temperature (between — 2°C to 12°C) for about 50 days is needed to induce flowering.
7. Plants can be devernalizd i.e., vernalization can be reversed or nullified by exposure to high temperature (about 40 °C).
8. Gibberellic acid can replace cold treatment to induce vernalization.