Question

what are the three types of endosperm? describe them briefly

Answer 1

Answer:

Three main types of endosperm development in flowering plants are:

(i) Nuclear type

(ii) Cellular type

(iii) Helobial type

Explanation:

(i) Nuclear type:

In the nuclear type of endosperm, the first division of the primary endosperm nucleus and a few subsequent nuclear divisions are not accompanied by wall formation.

(ii) Cellular type:

In this case, there is cytokinesis after each nuclear division of the endosperm nucleus.

(iii) Helobial type:

It is an intermediate type between the nuclear and cellular types. The first division is accompanied by cytokinesis but the subsequent ones are free nuclear.

A large number of nuclei are formed in the micropylar chamber by free nuclear divisions while the nucleus of the chamber towards the chalazal end divides to form fewer free nuclei or may not divide at all.

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