1 / 26

Seedless Plants

Seedless Plants. Plant Evolution. Plant Evolution. Nonvascular Seedless plants (Ordovician - 475 mya) Vascular Seedless plants (Devonian - 400 mya) Vascular Seed plants (Carboniferous - 360 mya) Flowering plants (Cretaceous - 130 mya). Plant Evolution (Common with Algae).

bruno-rojas
Download Presentation

Seedless Plants

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Seedless Plants

  2. Plant Evolution

  3. Plant Evolution • Nonvascular Seedless plants • (Ordovician - 475 mya) • Vascular Seedless plants • (Devonian - 400 mya) • Vascular Seed plants • (Carboniferous - 360 mya) • Flowering plants • (Cretaceous - 130 mya)

  4. Plant Evolution(Common with Algae) • Multicellular and Eukaryotic • Cell walls made of Cellulose • Chlorophyll a and b • Store excess sugar as starch

  5. Adaptations to Terrestrial Life • Apical Meristems • Multicellular Dependent Embryos • Alternation of Generation • Walled Spores produced in Sporangia • Other Adaptations • Cuticle, stomata, Xylem & Phloem, secondary compounds

  6. Apical Meristems

  7. Multicellular Dependent Embryos

  8. Alternation of Generation

  9. Walled Spores produced in Sporangia

  10. Other Adaptations

  11. Adaptations in Shallow Water Algae • Subjected to occasional drying • Protection of gametes and embryos in gametangia • Sporopollenin

  12. Nonvascular Seedless plants Bryophyta Mosses Hepatophyta Liverworts Anthocerophyta Hornworts Vascular Seedless plants Lycophyta Club mosses Psilophyta Whiskferns Spenophyta Horsetails Pterophyta Ferns Classification of Seedless Plants

  13. Nonvascular Seedless Plants • Plant is a thallus (no vascular tissue) • no true leaves, roots, stems • Embryophytes • gametangia • (antheridium and archegonium) • sporangium (produces spores)

  14. Hepatophyta • Liverworts • Two forms • leafy (80%) • thalloid (20%)

  15. Hepatophyta • Liverworts • Reproduction • asexual (gemmae cups) • sexual

  16. Anthocerophyta • Hornworts • Similar to liverworts except for sporophytes • Most closely related to higher plants

  17. BryophytaMosses

  18. BryophytaMosses

  19. Vascular Seedless Plants • Formation of vascular tissue • Xylem (water) • Phloem (food) • True leaves, roots, and stems • Lignin • Sporophyte generation dominate • Sperm with flagella

  20. Lycophyta • Lycophytes • true leaves • microphylls • true stems • true roots • sporophylls • leaves that produce spores

  21. Psilophyta • Whisk Ferns • no true leaves • no true roots

  22. Sphenophyta • Horsetails • true leaves • microphylls • true stems • silica • true roots

  23. Division: Pterophyta

  24. Division: Pterophyta

  25. Fern Life Cycle

More Related