Seeing On A Cellular Scale
The prothallus is a based foundation for most ferns.
The prothallus start forming, just after the gameophyte divides cells to form a green heart shape.
Where the asexual reproduction organs are around the centre part of the prothallus.
The role of prothallus is the reproduction can occur to regeneration a new offspring, as well it also give nutrients to young sporophyte fern.
With the heart shape prothallus, where the female archegonia are found near the notch of the heart and just above the rhizoids roots.
The prothallus is where the male antheridia are found the inner edge of the heart shape around the rhizoids roots.
The prothallus role after fertilization is of food source for the sporophyte fern.
The sporophyte fern needs the prothallus to help maintain healthy source of photosynthesis.
As well the prothallus is use as a stable platform for the rhizoids roots to hold firmly into the soil.