MIB1 - Pteridophytes
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Pteridophytes undergo a two-stage life cycle of sporophyte and gametophyte generations. The sporophyte produces spores through sporangia clustered in sori on fertile fronds. When spores germinate they grow into heart-shaped gametophytes that produce egg and sperm cells. Fertilization occurs when sperm swim down the neck of archegonia to fertilize eggs, forming zygotes that will grow into new sporophyte plants.
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MIB1 - Pteridophytes
- 1. GERMINATION AND DEVELOPMENTGERMINATION AND DEVELOPMENT OF PTERIDOPHYTESOF PTERIDOPHYTES Muslima P. Liwalug MIB 1
- 3. • 3-10mm long and 2-8 mm wide broad • green, photosynthetic structure • Usually heart or kidney shaped • Produces gametes
- 4. • Small spherical structures • produce flagellate sperm
- 5. • flask-shaped structure • produces a single egg at the bottom, reached by the sperm by swimming down the neck
- 7. • is a cluster of sporangia • form a yellowish or brownish mass on the edge or underside of a fertile frond
- 8. • Fruit cover • thin membrane covering the sorus • often shrivels away when spores are ready to be dispersed
- 9. • Spore case • single-celled or many- celled structure in which spores are produced
- 12. The End.The End.