Question

what is endosperm ? give ab account of structure and its types?​

Answer 1

The endosperm is a tissue produced inside the seeds of most of the flowering plants following fertilization. It is triploid in most species. It surrounds the embryo and provides nutrition in the form of starch, though it can also contain oils and protein. This can make endosperm a source of nutrition in animal diet....

Answer 2

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Endosperm is the type of food laden tissue which is meant for nourishing the embryo in seed plants. In gymnosperms it represents the female gametophyte.

Depending upon the mode of its formation, angiospermic endosperm is of 3 types :-

• Nuclear Endosperm
• Cellular Endosperm
• Helobial Endosperm

Nuclear Endosperm :- The primary endosperm nucleus divides repeatedly without wall formation to produce a large number of free nuclei.

e. g. Maize , wheat, Rice etc.

Cellular endosperm :- Every division of the primary endosperm nucleus is followed by cytokinesis. Hence, endosperm becomes cellular from the very beginning.

e. g. Balsum, Datura etc.

Helobial Endosperm :- e.g. Helobiales of monocots. This is the first division of primary endosperms nucleus which is followed by transverse cytokinesis to form two different cell, larger micropyler and smaller chalazal.