Pteridophyta

PTERIDOPHYTA PPT BY VISHNU SHESHATHRI

1. SCIENCE SEMINAR VISHNU SHESHATHRI MOUNT LITERA ZEE SCHOOL, TIRUPPUR 1

2. What is Pteridophyta? A  pteridophyte   is a  vascular plant  (with  xylem  and  phloem ) that reproduces via  spores . The term is now used only informally to denominate a  fern  ( monilophyte ) or  lycophyte . Because pteridophytes produce neither  flowers  nor  seeds , they are also referred to as " cryptogams ". The pteridophytes include the ferns,  horsetails , and the lycophytes. 2

3. Pteridophyta Characteristics Pteridophytes are the first true land plants. They are seedless, vascular cryptogams. Life cycle is heterologous diplohaplontic type. Sporophyte has true roots, stem and leaves. Spores develop in sporangia are homosporous or heterosporous . Sporangia are produced in groups on sporophylls . 3

4. The Thallophytes,Bryophytes and Pteridophytes have naked embroys that are called spores. All these have hidden reproductive organ. 4

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6. THANK YOU! VISHNU SHESHATHRI N.D. 6