Pre-fertilization in Plant: Structure and Events

Pre-fertilisation in Plant: Structure and Events -

• Much before the actual flower is seen on a plant, the decision that the plant is going to flower has taken place.
• Several hormonal and structural changes are initiated which lead to the differentiation and further development of the floral primordium.
• Inflorescences are formed which bear the floral buds and then the flowers.
• Pre-fertilisation events include male reproductive organ (androecium), female reproductive organ (gynoecium), pollination and fertilisation.
• In the flower, the male and female reproductive structures, the androecium and the gynoecium differentiate and develop. 
• The androecium consists of a whorl of stamens representing the male reproductive organ and the gynoecium represents the female reproductive organ.
• The following pre-fertilisation events can be studied:

1. Pollen grain formation
2. Embryo sac formation
3. Pollination
4. Pollen Pistil interaction