Exercise : L.S of an Angiospermic
ovule.
Aim: To study and identify
the L.S. of an Angiospermic Ovule.
Principle: In female reproductive
part of a flower, the basal swollen part is ovary. The ovules are present
inside the ovary, later they develops to seed.
Requirement: Permanent slide of L.S.
of Ovule, microscope
·
Ovule or megasporangium is protected by one / two coverings called
integuments.
·
The stalk of the ovule is called funicle.
·
The point of attachment of funicle to the body of the ovule is
known as hilum.
·
The body of the ovule is made up of a central mass of
parenchymatous tissue called nucellus.
·
The integuments form a pore called micropyle and the region
opposite to the micropyle is called as chalaza.
·
The nucellus has a large, oval, sac like structure towards the
micropylar end called embryo sac.
·
A mature ovule, has 8 nuclei in its embryo sac.
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