Name: Events Before Fertilisation
Uploaded: 2019-07-19
Duration: 11 min 9 s
Description: The development of male and female gametes is a significant event among the pre-fertilisation events. Learn more about these stages in this interesting video.

Question

Explain the different types of endosperms in angiosperms.

Accepted Answer

The endosperm is the triploid structure formed by the triple fusion in angiosperms. It provides essential nutrition to the developing embryo. On the basis of the process of development, there are three types of endosperms:

Nuclear endosperm

The primary endosperm nucleus forms many nuclei by free nuclear divisions.

These nuclei get arranged on the periphery and a large vacuole is formed.

E.g. Coconut water

Cellular endosperm

The primary endosperm nucleus divides into two nuclei and a cell wall is formed between these two nuclei.

Each subsequent nuclear division is followed by cell wall formation.

E.g. Members of gamopetalae class

Helobial Endosperm

The first division of the primary endosperm nucleus is followed by wall formation resulting in the formation of a large and a small cell

It is a mixed form of nuclear and cellular type of endosperm

E.g. Members of helobial order of monocot plants

Explain the different types of endosperms in angiosperms.

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