Reproduction in flowering plants (also known as angiosperms) is sexual reproduction involving the formation of flowers, pollination, fertilization, seed formation, and fruit development. Here's an overview:
1. Structure of a Flower
A typical flower has four main parts:
Sepals (protect the flower bud)
Petals (attract pollinators)
Stamens (male reproductive part): made of anther (produces pollen) and filament
Carpels/Pistil (female reproductive part): consists of stigma, style, and ovary (contains ovules)
2. Pollination
Transfer of pollen from anther to stigma. It can be:
Self-pollination: same flower or same plant
Cross-pollination: between different plants of the same species (promotes genetic diversity)
Pollinators include insects, birds, wind, and water.
3. Fertilization
Pollen grain lands on the stigma, grows a pollen tube down through the style to the ovary.
Sperm cells travel through the tube to fertilize the ovule (egg cell).
This results in zygote formation which develops into an embryo.
4. Seed and Fruit Formation
The fertilized ovule becomes a seed.
The ovary develops into a fruit, which protects the seeds and aids in their dispersal.
5. Seed Dispersal and Germination
Seeds are dispersed by wind, water, animals, or mechanical forces. When conditions are right, a seed germinates, giving rise to a new plant.