The two key parts of the pistil that develop into fruits and seeds are: Ovary: This swollen base of the pistil contains ovules, the precursors to seeds. After fertilization, the ovary wall thickens and ripens to become the fruit. Ovules: These are tiny structures within the ovary that contain egg cells. Once fertilized, ovules develop … Read more
Pollination and fertilisation is not required in apomixis as there is no involvement of male gametes in this process.
Parthenocarpy is the natural or artificially induced development of seedless fruits without fertilization.
The layer that supplies nourishment to the developing pollen grains is called the tapetum.
Hydrophily is the pollination of plants by water. Pollen grains are dispersed and carried by the flow of water to reach compatible female structures for fertilization.
Megasporogenesis is a crucial process in the sexual reproduction of flowering plants (angiosperms) and some gymnosperms. It refers to the development of megaspores, which are haploid spores that give rise to the female gametophyte, also known as the embryo sac.
While each pollen grain has two male gametes, at least 20 are needed for 20 ovules due to double fertilization. One gamete fuses with the egg, and the other with the central cell, requiring a 1:1 ratio of pollen to ovules. This ensures both fertilization and endosperm formation for embryo development.
In a mature embryo sac there are 6 haploid cells. These are: 3 antipodal cells 2 synergids 1 egg cell
The stigma is the part of the gynoecium that determines the compatible nature of pollen grains.