Chapter 2 Biology

SEXUAL REPRODUCTION IN FLOWERING PLANTS…🥀

All Flowering plants show sexual reproduction

Flowers are the object of aesthetic ornamental social religious and cultural value

Flowers ours are morphological and andrological marvales and site of sexual reproduction

Pedicle = flower stalk

Petiole = leaf stalk

Peduncle = inflorescence stalk

Androecium

Consists of male part of flower that is stamen

ANTHER

Bilobed
Dithecous
Tetrasporangiate

ANTHER wall layers

1. Epidermis.

2. Endothecium

3. Middle layer

4. Tapetum

Functions of all 4 wall layers of ANTHER

Microsporogenesis

Pollen grain

Pollen grains are microscopic structures, which bear androecium – a male reproductive organ of a flower. The interior section of pollen grain contains cytoplasm along with the tube cell, which converts into a pollen tube and the generative cell releases the sperm nuclei.