Sexual Reproduction In Flowering Plants – Notes
Male Reproductive Organs Of a Flower
The flower is a modified shoot with shortened internodes.
The androecium, a whorl of stamens, is the male reproductive part of a flower.
The stamen consists of a bilobed anther and a filament.
Each lobe contains of a bilobed anther and a filament.
Each lobe contains a microsporangium that is surrounded by a multi-layered wall consisting of the epidermis, endothecium, middle layers and the tapetum.
The centre of the microsporangium is occupied by sporogenous tissue made up of microspore mother cells.
Microspore mother cells divide meiotically to form microspores by a process called microsporogenesis.
The microspores separate from the tetrad and develop into young pollen grains, the male gametophyte of a flowering plant.
Female Reproductive Organs of a Flower
The gynoecium is the female reproductive organ.
Depending on the number of carpels, the gynoecium can be: