Gametophyte or Prothallus of or Fern (Slide - Spot)
Gametophyte or Prothallus of
or Fern (Slide - Spot)
Fig. 25: Adiantum, a Mature prothallus.
Fig. 26: Prothallus (Gametophyte)of Fern
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
The- male organs are called
Female organs are known as archegonia which are borne
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