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Diversity in the plant kingdom

Diversity in the plant kingdom. © 2008 Paul Billiet ODWS. Bryophyta. Small terrestrial plants restricted to damp habitats Water is needed for fertilisation Spores ensure dispersal. © 2008 Paul Billiet ODWS. www.flwildflowers.com/flwildflowers.html. Bryophyta. Hepaticae the liverworts

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Diversity in the plant kingdom

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  1. Diversity in the plant kingdom © 2008 Paul Billiet ODWS

  2. Bryophyta • Small terrestrial plants restricted to damp habitats • Water is needed for fertilisation • Spores ensure dispersal © 2008 Paul Billiet ODWS

  3. www.flwildflowers.com/flwildflowers.html Bryophyta • Hepaticae the liverworts • Prostrate thallus with rhizoids © 2008 Paul Billiet ODWS

  4. Bryophyta • Musci the mosses • Erect stem with leaflets +/- rhizoids http://www.univ-ubs.fr/ © 2008 Paul Billiet ODWS

  5. Filicinophyta the ferns • Water still needed for fertilisation • Spores ensure dispersal • Vascular plants • Lignified tissue (wood) may be present • Differentiated into: leaves, stem, roots, rhizome © 2008 Paul Billiet ODWS

  6. procosara.org/san_rafael_en,photo,64?PHPSESSI... www.rook.org/earl/bwca/nature/ferns/index.html Filicinophyta

  7. Coniferophyta the conifers • Vascular plants • Seed plants • Seeds contain a food store for an embryo inside protective coat • Seeds ensure dispersal • Naked seeds born in cones http://www.nasa.gov/centers/goddard/news/topstory/2006/forest_changes_prt.htm © 2008 Paul Billiet ODWS

  8. http://www.nearctica.com/trees/conifer/places/eastern.htm Coniferophyta Araucaria sp. (Monkey-puzzle) http://www.britannica.com/ebc/art-21824/Monkey-puzzle-tree

  9. Angiospermophytathe flowering plants • Vascular plants • Seed plants • Seeds protected by an ovary which becomes a fruit • Fruit, a structure that encourages seed dispersal © 2008 Paul Billiet ODWS

  10. Summary © 2008 Paul Billiet ODWS

  11. Dicotyledons & Monocotyledons • Angiosperms are divided into two groups • The basic distinguishing feature are embryonic leaves (coytledons) • Cotyledons are found in the seeds of these plants © 2008 Paul Billiet ODWS

  12. Seed coat or testa Cotyledons acting as a food reserve Plumule (to become the first true leaf) Micropyle Radicle (to become the first root) Dicotyledon seed © 2008 Paul Billiet ODWS

  13. Seed coat Endosperm (food reserve) Cotyledon Plumule Radicle Monocotyledon seed © 2008 Paul Billiet ODWS

  14. Dicots v Monocots – other differences © 2008 Paul Billiet ODWS

  15. Vascular tissue Vascular tissue Cortex Pith Epidermis Dicots v Monocots – other differences © 2008 Paul Billiet ODWS

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