In the life of most flowering plants, 3 distinct phases are seen.
i) Seed germination and vegetative growth phase
ii) Reproductive phase
iii) Senescence and death
Germination of Seed
The seed is the outcome of sexual reproduction in flowering plants. It represents the beginning of a new generation. A seed is defined as a fertilised mature ovule that possesses an embryonic plant, stored food material and a protective coat. A seed represents a miniature plant with an adequate supply of reserve food material for nourishment of the developing embryo inside the seed.
During this period, all life activities are temporarily suspended and the seed is said to be in suspended animation. When conditions become favourable, the seed assumes active life, germinates and grows into a new plant.