NON-VASCULAR PLANTS - PowerPoint PPT Presentation

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non vascular plants n.
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NON-VASCULAR PLANTS

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  1. NON-VASCULAR PLANTS JRMG 2010 Bio1

  2. WHAT ARE PLANTS?????

  3. KINGDOM PLANTAE • Multicellular eukaryotes • CW: cellulose • Chlorophyll a and b • “STATIONARY ANIMALS EAT SUNLIGHT” • Immobile • Alternation of Generations

  4. Basic Plant LIFE CYCLE

  5. NEEDS of PLANTS • Sunlight • Water • Minerals • Gas

  6. Overview of Plant Evolution • Algae- water • Land plants • Light and CO2 • Water and Minerals • Shoot system • Cuticle (2º product) • Lignin • Sporopollenin*

  7. HOW DID PLANTS BECOME SUCCESFUL ON LAND????????

  8. PLANT EVOLUTION:AS EMBRYOPHYTES • Gametes: non-aquatic environment • Embryos: protected • From EARLY PLANTS: • Gametangia • Production, protection, site of fertilization • Transformation to Embryophytes

  9. EVOLUTIONARY ORIGINS • Oxygen existence • Algae • Photosynthetic prokaryotes • Ancestral algal species • Charophytes • Cooksonia

  10. CHAROPHYTES • branch of Phylum Chlorophyta • plant ancestor Chara braunii

  11. CHAROPHYTES Chaetosporidium Choleochaete orbicularis

  12. Cooksonia

  13. Kingdom Plantae

  14. History of Terrestrial Adaptation Charophytes: aquatic ancestors • 1ST ADAPTATION: Spores→Sporopollenin • Jacketed gametangia • EMERGENCE OF BRYOPHYTES

  15. Sporopollenin Cuticle

  16. Gametangia

  17. 2ND ADAPTATION: Vascular tissues • EMERGENCE OF VASCULAR PLANTS

  18. 3RD ADAPTATION: ORIGIN OF SEED • Colonization of land plants • Naked seeds • EMERGENCE OF GYMNOSPERMS

  19. 4TH ADAPTATION: Modification of seeds • Protective coat • EMERGENCE OF ANGIOSPERMS

  20. BREAKDOWN OF K. PLANTAE • Non- vascular plants • P. Bryophyta, P. Hepatophyta and P. Anthocerophyta • Vascular plants/ TRACHEOPHYTA • Gymnosperms • Angiosperms

  21. NON- VASCULAR PLANTS • Without vascular tissue • Life cycle depends: water (reproduction)

  22. PHYLUM BRYOPHYTA • Environment: water • Moist habitat and nutrient poor soil • Can tolerate low temp • STRUCTURE • Stalk + capsule= sporophyte • Leaf like and stem like structure • gametophyte • Life cycle (http://www.zo.utexas.edu/faculty/sjasper/bio213/plants.html)

  23. Sphagnum

  24. PHYLUM HEPATOPHYTA • Liverworts • Gametophyte: umbrella like (gametangia) • Archaegonium • Antheridium • ASEXUAL REPRODUCTION: Gemmae • Haploid cells • Gemmae cups

  25. Marchantia polymorpha

  26. Female gametophyte Male gametophyte

  27. SEXUAL REPRODUCTION

  28. RHIZOID

  29. Asexual Reproduction

  30. PHYLUM ANTHOCEROPHYTA • Damp soil • Sporophyte: horn-like • Sporophyte reamins attached to the gametophyte • divides continuously • Large chloropast/cell

  31. Anthoceros Dendroceros

  32. Dendroceros

  33. LIFE CYCLE: SEXUAL