1. GYNOECIUM- It is the female reproductive part of plant. It consist of single pistil (monocarpellary) or may have more than one pistil (multicarpellary).
PARTS OF CARPLE :-
Ovary has an ovarian cavity with one or more chambers (locule).
The placenta is located inside the ovarian cavity .Arising from the placenta
are the megasporangia commonly called ovules
1 FUNICLE
-The stalk of ovule by which it remains attached to placenta.
2. HILUM
– It is the point of attachment of funiculus to the body of ovule.
3. INTEGUMENT
– It is the protective envelop surrounding the body of ovule.
4.MYCROPYLOR
– It is a small opening near the tip of integument
5.CHALAZA
-It is a basal part of ovule.
6.NUCELLUS
-it provide nourishment to embryo sac
7.EMBRYO SAC
-is located in the nucellus -it
-called female gametophyte.
The process of formation of megaspore from megaspore mother cell (MMC) is called megasporogenesis.
Ovules generally differentiate a single megaspore mother cell (MMC).
The MMC undergoes meiosis and forms a linear tetrad of four haploid megaspore. Out of which one remain functional (chalazal end) and three degenerate (micropylar end).
One of the functional megaspore develops into female gamete.
The process of formation of embryo sac from the single functional megaspore is termed as monosporic development.
EGG APPARATUS
– It is located at mycropylor end.
– having 1 egg cell, synergids 2
CENTRAL CELL
-It has 2 poller nuclei.
ANTIPODALS
-It is located at chalazal end.
-has 3 cell at the basal end