1. Mahatma Fule Mahavidyalaya, Warud
MORPHOGENESIS IN
PTERIDOPHYTE
DR. O. S. DESHMUKH
Department of Botany
Mahatma Fule Mahavidyalaya, Warud
2018

2. Index Introduction Gametophyte Sporophyte Ecology Heterospory
Reproduction
Life cycle
Conclusion
References

3. Introduction A Pteridophyte normally exists in two diverse
morphological forms during its life history.
The small simple haploid gametophyte and the
large morphologically complex diploid
sporophyte in the typical life cycle the two
generations are isolated from each by meiosis
and syngamy.
Pteridophyte- gametophyte is totally
independent for support and nutrition in fern
or fern ally.
Apogamy- haploid sporophyte develop directly
from the prothallus e.g. Pellaea, Trichomanes.

4. Gametophyte Prothallus (monoecious/ dioecious) Free living
Usually photosynthetic
Without vascular tissue, cuticle and stomates
Producing male and female gametangia
(antheridia and archegonia)

5. Sporophyte Independent of the gametophyte at maturity
With vascular tissue, cuticle and stomates
Varying in size and complexity
Producing spores-
eusporangiate/leptosporantiate
Spores all of one size (homosporous)
Two sizes, large and small (heterosporous)
Root, stem and leaves.
3 d

7. T. S. Stem Rhynia
T. S. Stem Selaginella
T. S. Stem
Selaginella
T. S. Stem Equisetum
T. S. Stem Marsilea

10. Ecology Represented today by a variety of growth habit (life form)
Hence occupying a wide range of habitat
Notwithstanding the dependence on the
viability of liquid water for sexual reproduction
Aquatic (Marsileales, Salviniales)
Rhizomatous
Clumped
Terrestrial, epiphytic
Arboreal (Dicksoniaceae, tree fern)
Some times extremely weedy (Pteridium)
As a group much more abundant and diverse
Dispersal occurs via spore

11. Heterospory Is the production of different kinds of spore
Microspore- male gametophyte
Megaspore- female gametophyte

12. Reproduction Reproduce by spore which are produce within sporangia
Sporophyll
Sorous
Sporocarp

13. Life cycle Heteromorphic This fern life cycle is representative of all
Pteridophyte

15. Conclusion Plants with sporophytic organization mainly
because of the factors, physical, pressure,
gradient of growth hormones.
The manifestation of sporophytic organization
environmental factors
Considering alternation of generation as a
morphogenetic problem which still require more
investigation and information with a newer
technique for its complete elucidation

16. References Pandey, B.P. (2003). College Botany Vol.II
Rastogi Publication, Merrat:
Parihar, N.S. (1977). An introduction to
Embryophyta Vol.II- Pteridophyte, Allahabad
Publication, Allahabad:
Vashistha, P. C. (2000). Botany for Degree
Students Pteridophyta (Vascular Cryptogams),
S. Chand and Co. New Delhi:

17. Thanks