Tamil Nadu Board of Secondary EducationHSC Science Class 12

Pre-fertilization in Plant: Structure and Events

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Notes

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
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