Development of Endosperm: Nuclear Endosperm, Cellular Endosperm, Helobial Endosperm, Special Points

• Endosperm develops from the primary endosperm nucleus after the fertilization which stored food materials.
• It is utilized by the embryo during the early development then after at the time of seed germination.
• Food is present in the form of starch in endosperm. The endosperm is of three types on the basis of development:-

Nuclear Endosperm: This type of endosperm mostly found in Dicotyledons (Polypetalae). Nuclear endosperm is also present in Capsella.

• Such type …

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Fertilization

• The fusion of male gamete with female gamete is called fertilization. Firstly fertilization was discovered by Strasburger (1884) in Monotropa plant.
• The male gametes are brought to the egg present in female gametophyte by a pollen tube. This phenomenon is called siphonogamy which was discovered by G. B. Amici in Portulaca plant.
• In angiosperms pollen grains are deposited on the stigma, whereas in gymnosperms they usually land directly on the nucellus.
• This proc…

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