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Mosses, Ferns and Lycopods

Mosses, Ferns and Lycopods. BIOL 1407. Non-Vascular Plants. Characteristics No vascular tissue Small Moist habitats No true roots, stems or leaves Photo Credit: Manfred Morgner, 2002, Wikimedia Commons. Non-Vascular Plants. Gametophyte dominant Sporophyte dependent. Non-Vascular Plants.

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Mosses, Ferns and Lycopods

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  1. Mosses, Ferns and Lycopods BIOL 1407

  2. Non-Vascular Plants • Characteristics • No vascular tissue • Small • Moist habitats • No true roots, stems or leaves • Photo Credit: Manfred Morgner, 2002, Wikimedia Commons

  3. Non-Vascular Plants • Gametophyte dominant • Sporophyte dependent

  4. Non-Vascular Plants • Spores for dispersal

  5. Non-Vascular Plants • Swimming sperm • Photo Credit for Moss Antheridial slide: Dr. Steve Bostic, 2008

  6. Modern Non-Vascular Plants • “Bryophytes” • Mosses • Liverworts • Hornworts • Photo Credit for mosses & liverworts: ACC Field Biology Student, Enchanted Rock

  7. Mosses

  8. Moss Gametophytes & Sporophytes • Photo Credit: ACC Field Biology Student, Austin Nature Center

  9. Evolution of Vascular Plants • Vascular Tissue • Support  taller • Branches  more sporangia and spores • Transportation • Water • Minerals • Sugars

  10. Vascular Plant Characteristics • Vascular Tissue Present • Xylem • Phloem • True roots, stems and leaves

  11. Vascular Plants Photo Credit for Leaves: Doyle Cross, El Yunque, Puerto Rico, 2007

  12. Seedless Vascular Plants • Sporophyte dominant • Gametophyte independent and small

  13. Seedless Vascular Plants • Spores for dispersal • Photo Credit for Fern Sporophyte: Doyle Cross, 2007, El Yunque, Puerto Rico

  14. Seedless Vascular Plants • Swimming sperm • Photo Credit for Fern Sperm SEM: Dr. Karen Renzaglia, Southern Illinois University Carbondale

  15. Modern Seedless Vascular Plants • Lycophytes • Spike moss (Selaginella) • Club mosses (Lycopodium)

  16. Modern Seedless Vascular Plants • Ferns and Fern Allies • Ferns • Horsetails • Photo Credits: Doyle Cross, 2007, El Yunque, Puerto Rico (ferns); ACC student, Austin Nature Center field trip, 2006 (horsetails)

  17. Fern Sporophytes and Gametophyte • Photo Credit for Sporophytes: ACC Field Biology Student, Austin Nature Center, 2006 • Photo Credit for Gametophyte: Betsy Maxim, 2008

  18. Strobili • Located near top of stem • Spore-bearing leaves • Sporophylls  Spores • Photo Credits: Doyle Cross, El Yunque, Puerto Rico, 2007

  19. Homospory • Homosporous plants • One spore size • Bisexual gametophytes • Photo Credits: Dr. Steve Bostic, 2008

  20. Heterospory • Heterosporous plants • Two types of spores • Megaspores • Microspores • Photo Credits: Doyle Cross, El Yunque, Puerto Rico, 2007

  21. Megaspores • Grow into female gametophytes • Photo Credit: Dr. David Byres, Florida Community College at Jacksonville

  22. Microspores • Grow into male gametophytes • Photo Credit: Dr. David Byres, Florida Community College at Jacksonville

  23. The End Unless otherwise specified, all images in this presentation came from: Campbell, et al. 2008. Biology, 8th ed. Pearson Benjamin Cummings.

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