Gametophyte or Prothallus of or Fern (Slide - Spot)

Gametophyte or Prothallus of or Fern (Slide - Spot)

Gametophyte or Prothallus of
or Fern (Slide - Spot)
V
i'
Prothallus
Archegonium
Antheridia
Rhizoids
Fig. 25: Adiantum, a Mature prothallus.
Fig. 26: Prothallus (Gametophyte)of Fern
l.
2'
3'
4'
l:
The gametophyte is a heart-shaped body, called prothallus. '
From the under surface of prothallus a number rhizoids arise which
fix it into the soil.
The prothallus is a gametophyte. It produces two different types of reproductive
organs, male
and female.
The- male organs are called
in shape.
5'
Female organs are known as archegonia which are borne
the prothallus.
6'
7
'
antheridia which are developed. towards the rhizoids, and spherical
in the central multicellular region of
The archegonium is.a flask-shaped body consists of a lower swollen part, the
venter and an
upper tube like portion, the neck.
The venter contains an egg cell and a venter canal cell. Egg cell is the female
gamete.
40 PracticalJournal
Botany Xl